WO2025236473A1 - Rehabilitation training method and apparatus for unilateral spatial neglect, device, and storage medium - Google Patents

Abstract

A rehabilitation training method and apparatus for unilateral spatial neglect, a device, and a storage medium. The method comprises: controlling multiple graphic symbols to flicker randomly at different flickering frequencies; collecting a first SSVEP signal when a user gazes; when it is determined that the user's attention is sufficiently focused, control at least two target graphic symbols to move in a specific movement direction and at a specific movement speed within the user's unilateral visual neglect space range; then acquiring a second SSVEP signal when the user gazes; and when it is determined that the user is focusing attention on completing a training task, control an electrical stimulator placed on the user's neck to send a transcutaneous electrical nerve stimulation signal. Thus, whether a subject's attention is sufficiently focused can be determined before training, and when it is determined that the subject is effectively gazing at the training content, an instruction is issued to provide an electrical stimulation signal, thereby forming a closed loop; the effectiveness of training can be ensured, the training effect can be improved, and popularization in patients with unilateral spatial neglect is facilitated.

Description

Unilateral spatial neglect rehabilitation training methods, devices, equipment, and storage media Technical Field

This invention belongs to the field of brain-computer interface technology, specifically relating to a method, device, equipment, and storage medium for unilateral spatial neglect rehabilitation training based on brain-computer interface.

Background Technology

Unilateral spatial neglect (USN) is a common functional impairment following stroke, often manifesting as an inability to pay attention to stimuli on the side opposite the lesion, resulting in visual, auditory, and tactile neglect. Clinically, approximately 28.6% of stroke patients experience varying degrees of unilateral spatial neglect, with the most common being left-sided visual neglect following damage to the right dominant hemisphere. Typically, the patient's vision, eye movements, and visual field are normal, but due to attention deficit, the patient often "ignores" objects on the side opposite the damaged brain region. USN is essentially a complex cognitive impairment that not only affects spatial attention but also significantly impacts rehabilitation adherence and the recovery of other functions such as cognition and motor function. Currently, unilateral neglect has been listed as an independent risk factor for predicting stroke prognosis.

Brain-computer interface (BCI) technology is a human-computer interaction technology that establishes a direct communication and control channel between the brain and a computer or other electronic devices. It can enhance the interaction between patients with motor dysfunction and the outside world, and its research and application in the fields of neuroengineering, rehabilitation, and brain science are becoming increasingly widespread. Based on the different methods of acquiring EEG signals, BCI is divided into invasive and non-invasive types. Among them, the non-invasive BCI system based on steady-state visual evoked potentials (SSVEP) and motor imagery is currently the most widely researched and applied.

SSVEP-based BCI systems typically determine the focus target by obtaining frequency information from EEG signals induced by periodic visual stimuli. Motor imagery, on the other hand, refers to the activation of specific brain regions even when a person imagines their limbs or muscles moving without actual physical movement. Motor imagery-based BCI systems can read the user's subjective motor awareness and determine their motor intentions by identifying specific EEG changes induced by different tasks, thus achieving peripheral control at the central level.

Existing BCI systems used in USN rehabilitation training are mostly based solely on motor imagery. This means they execute a pre-set procedure and provide feedback based on whether the subject successfully imagines the set content. This places very high demands on the subject's attention and comprehension, resulting in poor training effectiveness and making it unsuitable for widespread application to patients with unilateral spatial neglect.

Summary of the Invention

The purpose of this invention is to provide a method, device, equipment, and storage medium for rehabilitation training of unilateral spatial neglect, which can ensure the effectiveness of training, improve training results, and facilitate promotion for patients with unilateral spatial neglect.

The first aspect of this invention discloses a unilateral spatial neglect rehabilitation training method, comprising:

Control multiple patterns and symbols to flash randomly at different flashing frequencies at multiple positions on the display;

Collect the first steady-state visual evoked potential signal of the user looking at the display, and determine whether the user's attention is sufficiently focused based on the first steady-state visual evoked potential signal;

When it is determined that the user's attention is sufficiently focused, at least two target pattern symbols on the display are controlled to move within the space that is ignored by the user's visual perception on one side, with a specific movement direction and a specific movement speed; wherein, the specific movement direction is from the healthy side to the ignored side, and the target pattern symbol is any pattern symbol among a plurality of pattern symbols;

Acquire the second steady-state visual evoked potential signal when the user gazes at the target pattern symbol, and determine whether the user has focused their attention to complete the training task based on the second steady-state visual evoked potential signal;

When the user is determined to have focused attention on completing the training task, a transcutaneous electrical nerve stimulation signal is emitted from an electrical stimulator placed on the user's neck, with the stimulator located on the side that the user is ignoring.

In some embodiments, before controlling at least two target pattern symbols on the display to move within a spatial range that is ignored by the user's unilateral visual perception in a specific direction and at a specific speed, the method further includes:

Get the maximum displacement of the user's eyeball while reading a single line of moving sample text on the monitor;

The critical line for unilateral visual neglect by the user is determined based on the maximum displacement, and the spatial range for unilateral visual neglect by the user is determined based on the critical line.

In some embodiments, before controlling at least two target pattern symbols on the display to move within a spatial range that is ignored by the user's unilateral visual perception in a specific direction and at a specific speed, the method further includes:

Obtain the average eye movement velocity of the user's eyes while reading a single line of moving sample text on the monitor;

A specific movement speed is determined based on the average eye movement speed.

In some embodiments, determining whether the user's attention is sufficiently focused based on the first steady-state visual evoked potential signal includes:

The first steady-state visual evoked potential signal is decoded and classified to obtain a first classification label;

The user's classification accuracy is obtained by comparing the first category label with the preset label;

When the classification accuracy reaches a specified percentage, it is determined that the user's attention is sufficiently focused.

In some embodiments, determining whether a user has focused their attention to complete a training task based on the second steady-state visual evoked potential signal includes:

The second steady-state visual evoked potential signal is decoded and classified to obtain a second classification label;

When the second category label is the same as the prompt label corresponding to the target pattern symbol, it is determined that the user has focused their attention to complete the training task.

A second aspect of the present invention discloses a unilateral spatial neglect rehabilitation training device, comprising:

The test unit is used to control multiple pattern symbols to flash randomly at different flashing frequencies at multiple positions on the display.

The first acquisition unit is used to acquire the first steady-state visual evoked potential signal of the user's gaze at the display;

The first judgment unit is used to determine whether the user's attention is sufficiently focused based on the first steady-state visual evoked potential signal.

The training unit is used to control at least two target pattern symbols on the display to move within a space that is visually ignored on one side of the user's side, with a specific movement direction and a specific movement speed, when it is determined that the user's attention is sufficiently focused; wherein, the specific movement direction is from the healthy side to the ignored side, and the target pattern symbols are any pattern symbols from a plurality of pattern symbols;

The second acquisition unit is used to acquire the second steady-state visual evoked potential signal when the user gazes at the target pattern symbol;

The second judgment unit is used to determine whether the user has focused their attention to complete the training task based on the second steady-state visual evoked potential signal.

An electrical stimulation unit is used to control an electrical stimulator placed on the user's neck to emit transcutaneous electrical stimulation signals when the user is determined to be concentrating on completing a training task. The electrical stimulator is located on the side that the user ignores.

In some embodiments, the apparatus further includes:

The first acquisition unit is used to acquire the maximum displacement of the user's eyeball during the process of reading a single line of moving example text on the display before the training unit controls at least two target pattern symbols on the display to move within a space that is ignored by the user's unilateral visual perception, in a specific moving direction and at a specific moving speed.

The range determination unit is used to determine the critical line for unilateral visual neglect by the user based on the maximum displacement, and to determine the spatial range for unilateral visual neglect by the user based on the critical line.

In some embodiments, the apparatus further includes:

The second acquisition unit is used to acquire the average eye movement speed of the user's eyeballs during the process of reading a single line of moving example text on the display before the training unit controls at least two target pattern symbols on the display to move within a space that is ignored by the user's unilateral vision in a specific moving direction and at a specific moving speed.

A velocity determination unit is used to determine a specific movement speed based on the average eye movement speed.

A third aspect of the present invention discloses an electronic device, including a memory storing executable program code and a processor coupled to the memory; the processor calls the executable program code stored in the memory to execute the unilateral spatial neglect rehabilitation training method disclosed in the first aspect.

The fourth aspect of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program causes a computer to perform the unilateral spatial neglect rehabilitation training method disclosed in the first aspect.

The beneficial effects of this invention are as follows: By controlling multiple pattern symbols to randomly flash at different frequencies at multiple positions on the display, a first steady-state visual evoked potential signal is acquired when the user gazes at the display, determining whether the user's attention is sufficiently focused; when the user's attention is sufficiently focused, at least two target pattern symbols on the display are controlled to move within the user's unilateral visual neglected space range in a specific direction and at a specific speed; wherein, the specific movement direction is from the healthy side to the neglected side, and the target pattern symbols are any pattern symbols from multiple pattern symbols; then, a second steady-state visual evoked potential signal is acquired when the user gazes at the target pattern symbols, determining whether the user has concentrated their attention to complete the training task; when the user has concentrated their attention to complete the training task, a transcutaneous electrical nerve stimulation signal is emitted from an electrical stimulator placed on the user's neck, wherein the electrical stimulator is located on the neglected side of the user, thereby determining whether the subject's attention is sufficiently focused before training, and immediately issuing an instruction to deliver a transcutaneous electrical nerve stimulation signal to stimulate the user's neck after ensuring that the subject effectively gazes at the training content, forming a closed loop, which can ensure the effectiveness of training, improve training results, and facilitate promotion for patients with unilateral spatial neglect.

Attached Figure Description

The accompanying drawings illustrate specific examples of the technical solutions described in this invention and, together with the detailed embodiments, form part of the specification, serving to explain the technical solutions, principles, and effects of this invention.

Unless otherwise specified or defined, the same reference numerals in different figures represent the same or similar technical features, and different reference numerals may be used to represent the same or similar technical features.

Figure 1 is a flowchart of a unilateral spatial neglect rehabilitation training method disclosed in an embodiment of the present invention;

Figure 2 is an architectural diagram of a unilateral spatial neglect rehabilitation training system disclosed in an embodiment of the present invention;

Figure 3 is a schematic diagram of a unilateral spatial neglect rehabilitation training device disclosed in an embodiment of the present invention;

Figure 4 is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present invention.

Explanation of reference numerals in the attached figures:

301. Test unit; 302. First acquisition unit; 303. First judgment unit; 304. Training unit; 305. Second acquisition unit; 306. Second judgment unit; 307. Electrical stimulation unit; 401. Memory; 402. Processor.

Detailed Implementation

Unless otherwise specified or defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. When combined with the technical solutions of the invention in a real-world scenario, all technical and scientific terms used herein may also have meanings corresponding to the purpose of achieving the technical solutions of the invention. The terms "first," "second," etc., used herein are merely for distinguishing names and do not represent a specific number or order. The term "and/or," as used herein, includes any and all combinations of one or more of the associated listed items.

It should be noted that when a component is considered "fixed" to another component, it can be directly fixed to the other component or there can be an intervening component; when a component is considered "connected" to another component, it can be directly connected to the other component or there can be an intervening component; when a component is considered "mounted" on another component, it can be directly mounted on the other component or there can be an intervening component; when a component is considered "placed" on another component, it can be directly placed on the other component or there can be an intervening component.

Unless otherwise specified or defined, the terms "described" or "the" as used herein refer to the technical features or technical content mentioned or described prior to the relevant section, which may be the same as or similar to the technical features or technical content mentioned herein. Furthermore, the terms "comprising" and "having," and any variations thereof, as used herein, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus.

This invention discloses a unilateral spatial neglect rehabilitation training method, which can be implemented through computer programming. The execution subject of this method can be an electronic device such as a computer, laptop, or tablet, or a unilateral spatial neglect rehabilitation training device embedded in an electronic device; this invention does not limit this. To facilitate understanding of this invention, specific embodiments will be described in more detail below with reference to the accompanying drawings.

As shown in Figure 1, the method includes the following steps 110-150:

110. Control multiple patterns and symbols to flash randomly at different flashing frequencies at multiple positions on the display.

In this embodiment of the invention, a unilateral spatial neglect rehabilitation training system is provided, as shown in Figure 2. The training system includes a computer, an electroencephalogram (EEG) device, an LED display screen, and a transcutaneous electrical nerve stimulator (TENS). The computer is communicatively connected to the EEG device, the LED display screen, and the TNS. The EEG device is designed as a cap to be worn on the user's head. The LED display screen is positioned within the user's field of vision and outputs optomotor stimulation signals. The TNS includes electrodes positioned on the user's neck near the trapezius muscle on the side of the user's visual neglect and outputs electrical stimulation signals. The computer has an embedded program for executing the unilateral spatial neglect rehabilitation training method provided by this invention.

120. Collect the first steady-state visual evoked potential signal of the user's gaze at the display, and determine whether the user's attention is sufficiently focused based on the first steady-state visual evoked potential signal.

In this embodiment of the invention, before rehabilitation training, it is necessary to measure whether the user's attention is focused. Specifically, multiple pattern symbols (such as dots, triangles, etc.) are set on the screen, and each pattern symbol is assigned a different flashing frequency. The positions of the pattern symbols remain fixed. While controlling the multiple pattern symbols to flash randomly at multiple positions on the display at different flashing frequencies, each time a pattern symbol is randomly turned red at one of its positions, it prompts the user to focus their attention on that pattern symbol and feel its flashing. This process is repeated until all pattern symbols have been indicated. After all the pattern symbols have been indicated, the system automatically processes the first SSVEP signal collected and determines whether the user's attention is sufficiently focused based on the first SSVEP signal. Specifically, determining whether the user's attention is sufficiently focused may include the following steps S11~S13 (not shown):

S11. Decode and classify the first steady-state visual evoked potential signal to obtain the first classification label.

S12. Compare the first category label with the preset label to obtain the user's classification accuracy.

S13. When the classification accuracy reaches a specified percentage, it is determined that the user's attention is sufficiently focused.

The process involves decoding and classifying the first SSVEP signal, comparing the resulting first classification label with a preset label to determine the user's classification accuracy in assessing attentional concentration. Generally, a classification accuracy of 80% or higher is considered sufficient to indicate adequate user concentration for further training. Conversely, a classification accuracy less than 80% indicates insufficient user concentration, precluding further training and ending the process.

The specific SSVEP signal decoding method is as follows:

A filter bank canonical correlation analysis (FBCCA) decoding method is employed, including filter bank analysis, canonical correlation analysis (CCA) processing, and target recognition. First, the SSVEP signal is decomposed into N sub-band components using different bandpass filters. Here, different sub-band components correspond to harmonics of different flicker frequencies of the SSVEP signal, and the number of sub-band components is the harmonic number of the SSVEP signal. Next, based on the flicker frequency corresponding to each sub-band component, the sine and cosine reference signals for each sub-band component are calculated. And calculate the correlation vector corresponding to each sub-band component. .in Represents quantity, related vector From the corresponding number Each flashing frequency of It consists of several correlation coefficients.

Sine and cosine reference signals With flicker frequency The relationship is:

;

in Indicates the number of harmonics, This indicates the number of sampling points in the harmonics. The number of sampling points = sampling frequency × sampling time. The sampling frequency is typically 1000 Hz, and the sampling time is set independently based on the experiment. Each sub-band component... The correlation vector consists of several correlation coefficients. for:

;

in represent and The correlation coefficient. The sum of the squares of the correlation vectors of each sub-band component multiplied by the corresponding weight coefficients constitutes the EEG signal features corresponding to the overall SSVEP signal. .

;

in Indicates the first Each subband component, and the weighting coefficient corresponding to the correlation coefficient of each subband component. It can be represented as:

;

and It is a constant.

Finally, the EEG signal characteristics of SSVEP signals It is a vector with one row and k columns, where k is the index of the target. EEG signal features are extracted. Next, an artificial neural network model from machine learning was used to perform binary classification of SSVEP EEG signal features, that is, to classify the EEG signal features... Input a pre-trained artificial neural network model, and obtain classification labels (vectors) based on the model's prediction results. The maximum value corresponding to The value is the classification label obtained from the classification, and the flashing frequency corresponding to this classification label is the frequency of the target stimulus. :

;

130. When it is determined that the user's attention is sufficiently focused, control at least two target pattern symbols on the display to move within a space that is ignored by the user's single-sided vision, with a specific movement direction and a specific movement speed.

The specific movement direction is from the healthy side to the ignored side, that is, from the side that is not ignored by the user to the side that is ignored by the user; the target pattern symbol is any pattern symbol among multiple pattern symbols.

Before performing step 130, the method also includes the following steps S21-S23 (not shown):

S21. Obtain the maximum displacement and average eye movement speed of the eyeball during the user's reading of a single line of moving sample text on the monitor.

Specifically, a video electronystagmography (EEG) device can be used to measure the speed and maximum displacement of the user's eyes while reading sample text. Measuring the maximum displacement is to determine the threshold at which the user's vision is ignored. When measuring the maximum displacement of the user's eyes, the average eye movement speed from the start of movement to reaching the threshold is calculated based on the user's eye movement speed while reading the sample text.

Before the measurement, the user's preset neglected side can be obtained. For example, if the user's clinical symptoms indicate left-sided visual-spatial neglect, the user's preset neglected side can be determined as the left and the healthy side as the right, based on human-computer interaction. During the measurement, a single line of moving example text is moved from the right healthy side towards the neglected side. Specifically, during the test, the user sits facing the monitor, keeping their line of sight at the same level as the screen. A video electronystagmography (VEOG) device is used to measure the user's eye movement speed and displacement as they read a single line of moving example text on the computer screen to determine the user's visual neglect threshold. The vertical line on the monitor that represents the maximum displacement and is perpendicular to the movement path of the single line of moving example text is the threshold line.

S22. Determine the critical line for unilateral visual neglect by the user based on the maximum displacement, and determine the spatial range for unilateral visual neglect by the user based on the critical line.

The critical line divides the display vertically into two parts, and the part closer to the user's preset neglected side is defined as the spatial range that the user visually ignores on one side. For example, if the user's preset neglected side is the left side, and the critical line divides the display vertically into left and right parts, then the left part of the display is defined as the spatial range that the user visually ignores on one side.

S23. Determine a specific movement speed based on the average eye movement speed.

In this embodiment of the invention, the measured average eye movement speed can be directly used as the specific movement speed of the visual stimulus symbol in subsequent brain-computer interface training, or the average eye movement speed can be calculated according to a certain proportion to obtain the specific movement speed, for example, 80%, 90% or 110% of the average eye movement speed can be taken as the specific movement speed.

Specifically, in step 130, the method of controlling at least two target pattern symbols on the display to move within the space neglected by the user's unilateral vision in a specific direction and at a specific speed is as follows: controlling at least two target pattern symbols on the display to move at a uniform speed from the healthy side to the neglected side within the space. For example, moving at an eye movement speed of 30-120°/s.

In this embodiment of the invention, the design of the stimulus interface is completed using MATLAB software programming. Specifically, the display simultaneously shows two pattern symbols with a diameter of 5cm, arranged vertically at the boundary line of the user's visual neglect. One pattern symbol is fixed, while the other pattern symbol moves at a constant speed from the healthy side to the neglected side. After moving to the boundary of the display, it starts to cycle continuously from the origin. The speed and range of the pattern symbol movement are set according to the user's average eye movement speed and the neglected spatial range. The vertical arrangement order of the two pattern symbols appears randomly.

140. Obtain the second steady-state visual evoked potential signal when the user gazes at the target pattern symbol, and determine whether the user has focused their attention to complete the training task based on the second steady-state visual evoked potential signal.

The specific implementation method for determining whether a user has focused their attention to complete the training task based on the second steady-state visual evoked potential signal is as follows: the second steady-state visual evoked potential signal is decoded and classified to obtain a second classification label; when the second classification label is the same as the prompt label corresponding to the target pattern symbol, it is determined that the user has focused their attention to complete the training task.

The method for decoding and classifying the second steady-state visual evoked potential signal is described above for the method for decoding and classifying the first steady-state visual evoked potential signal, and will not be repeated here.

150. When it is determined that the user is concentrating on completing the training task, the electrical stimulator placed on the user's neck is controlled to emit a transcutaneous electrical stimulation signal, wherein the electrical stimulator is located on the side that the user ignores.

Specifically, before BCI training begins, the user is ensured to be awake, able to receive test questions at an auditory or visual level, and in a relaxed state with their eyes looking straight ahead at the display. The patient is instructed to follow the movement of a bright spot with their eyes while keeping their head still. A relatively quiet testing environment is selected to begin the test task. First, the audio version of the test instructions is played, and simultaneously, the user interface "Please look at the moving pattern symbol" is displayed on the display. After the audio instructions finish playing, a 2-second wait is set, and then the display shows a fixed and moving pattern symbol interface for 5 seconds. The user is instructed to look at the pattern symbol to fully experience the target motion stimulus. The user's EEG signals during the test are recorded using an EEG recording device and transmitted in real time to the computer. The stimulation device determines the target pattern symbol selected by the user using relevant algorithms and then provides transcutaneous electrical nerve stimulation (TENS) on the neglected side of the neck to provide somatosensory feedback to the subject.

In this test, the user gazes at a moving pattern on a computer screen, and an EEG recording device records the user's EEG signals during the test. Algorithms are then used to determine the user's level of attention to the target pattern. For the hardware, the Neuroscan Synamps2 EEG recording system is used for EEG signal acquisition and recording. The placement of its 64-electrode caps conforms to the improved international 10-20 standard. A 1920 × 1080 resolution display with a 60 Hz refresh rate is used to present the stimulation interface. In addition, audio and video recording equipment is used, and the recording devices are kept on throughout the test to save the entire audio or video file, as well as the recorded EEG signals.

In the programming and data transmission environment section, the user interactive stimulation interface is coded using the Psychtoolbox software under MATLAB. The network environment is set up by establishing a local area network connection between the stimulation end computer and the acquisition end device. The TCP/IP protocol is set up to realize the real-time transmission of EEG data from the acquisition end to the stimulation end device.

During data acquisition and transmission, electrode caps are fitted to the user and connected to the amplifier section of the EEG recorder. Conductive paste is applied to the corresponding electrode positions to reduce the impedance to below 10kΩ and maintain stability. The test stimulation interface is then displayed to establish the data transmission environment. Simultaneously, the data acquisition unit begins recording the user's EEG data during the test task. The sampling rate is set to 1000 Hz, and a 50 Hz notch filter is used to remove power frequency interference.

Finally, provide feedback to the user based on whether they have completed the attention-focusing task.

When the user is able to concentrate on completing the gaze task, the computer identifies the attention success signal based on the EEG signal and issues an instruction to the TENS device to control the electrical stimulator to emit a transcutaneous electrical nerve stimulation signal. The frequency of the transcutaneous electrical nerve stimulation signal is set to 100Hz, the pulse duration is set to 100us, and the average intensity is set to 0.5uA/mm.

If it is determined that the user is unable to concentrate on completing the training task, voice prompts or manual guidance can be provided. Finally, the number of times the user has completed the attention tracking task and the user's personal information are displayed on the interface to complete the test.

In summary, by implementing the embodiments of the present invention, the visuomotor training method is transformed based on SSVEP-BCI, requiring only user gaze to complete. This allows the user to perceive neglected visuospatial spaces through training their visual tracking function, and simultaneously perceive neglected limb sensations through somatosensory stimulation provided by TENS. Providing stimulation simultaneously at both the central and peripheral levels forms a closed loop for neurorehabilitation, ensuring the effectiveness of the training.

This invention ensures the effectiveness of attention by decoding user attention based on SSVEP and motor imagery-BCI. At the same time, it uses the BCI system to connect visual-motor stimulation technology and TENS stimulation to form a closed-loop training mode, integrating active and passive attention. The closed-loop BCI can train both channels simultaneously, improving the training effect.

As shown in Figure 3, this embodiment of the invention discloses a unilateral spatial neglect rehabilitation training device, including a testing unit 301, a first acquisition unit 302, a first judgment unit 303, a training unit 304, a second acquisition unit 305, a second judgment unit 306, and an electrical stimulation unit 307, wherein...

Test unit 301 is used to control multiple pattern symbols to flash randomly at multiple positions on the display at different flashing frequencies;

The first acquisition unit 302 is used to acquire the first steady-state visual evoked potential signal of the user looking at the display.

The first judgment unit 303 is used to determine whether the user's attention is sufficiently focused based on the first steady-state visual evoked potential signal.

Training unit 304 is used to control at least two target pattern symbols on the display to move within the space ignored by the user's visual attention on one side, with a specific movement direction and a specific movement speed, when the first judgment unit 303 determines that the user's attention is sufficiently focused; wherein, the specific movement direction is from the healthy side to the ignored side, and the target pattern symbol is any pattern symbol among a plurality of pattern symbols;

The second acquisition unit 305 is used to acquire the second steady-state visual evoked potential signal when the user gazes at the target pattern symbol;

The second judgment unit 306 is used to determine whether the user has focused their attention to complete the training task based on the second steady-state visual evoked potential signal.

The electrical stimulation unit 307 is used to control the electrical stimulator placed on the user's neck to emit a transcutaneous nerve electrical stimulation signal when the second judgment unit 306 determines that the user is concentrating on completing the training task, wherein the electrical stimulator is located on the side that the user ignores.

As an optional implementation, the training device also includes the following units (not shown):

The first acquisition unit is used to acquire the maximum displacement of the user's eyeball during the process of reading a single line of moving example text on the display before the training unit 304 controls at least two target pattern symbols on the display to move in a specific direction and at a specific speed within a space ignored by the user's unilateral vision.

The range determination unit is used to determine the critical line for unilateral visual neglect by the user based on the maximum displacement, and to determine the spatial range for unilateral visual neglect by the user based on the critical line.

As an optional implementation, the training device also includes the following units (not shown):

The second acquisition unit is used to acquire the average eye movement speed of the user's eyeballs during the process of reading a single line of moving example text on the display before the training unit 304 controls at least two target pattern symbols on the display to move in a specific direction and at a specific speed within a space that is ignored by the user's unilateral vision.

A velocity determination unit is used to determine a specific movement speed based on the average eye movement speed.

Further optionally, the first determination unit 303 includes the following sub-units (not shown):

The first decoding subunit is used to decode and classify the first steady-state visual evoked potential signal to obtain a first classification label;

The comparison subunit is used to compare the first classification label with the preset label to obtain the user's classification accuracy.

The first decision subunit is used to determine whether the user's attention is sufficiently focused when the classification accuracy reaches a specified percentage.

Further optionally, the second break unit 306 includes the following sub-units (not shown):

The second decoding subunit is used to decode and classify the second steady-state visual evoked potential signal to obtain a second classification label;

The second judgment subunit determines that the user has focused their attention to complete the training task when the second classification label is the same as the prompt label corresponding to the target pattern symbol.

As shown in Figure 4, an embodiment of the present invention discloses an electronic device, including a memory 401 storing executable program code and a processor 402 coupled to the memory 401.

The processor 402 calls the executable program code stored in the memory 401 to execute the unilateral spatial neglect rehabilitation training method described in the above embodiments.

This invention also discloses a computer-readable storage medium storing a computer program that causes a computer to execute the unilateral spatial neglect rehabilitation training method described in the above embodiments.

The purpose of the above embodiments is to reproduce and derive the technical solution of the present invention by way of example, and to fully describe the technical solution, purpose and effect of the present invention. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosure of the present invention, and not to limit the scope of protection of the present invention.

The above embodiments are not an exhaustive list based on the present invention, and there may be many other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims (10)

A unilateral spatial neglect rehabilitation training method, characterized by comprising: Control multiple patterns and symbols to flash randomly at different flashing frequencies at multiple positions on the display; Collect the first steady-state visual evoked potential signal of the user looking at the display, and determine whether the user's attention is sufficiently focused based on the first steady-state visual evoked potential signal; When it is determined that the user's attention is sufficiently focused, at least two target pattern symbols on the display are controlled to move within the space that is ignored by the user's visual perception on one side, with a specific movement direction and a specific movement speed; wherein, the specific movement direction is from the healthy side to the ignored side, and the target pattern symbol is any pattern symbol among a plurality of pattern symbols; Acquire the second steady-state visual evoked potential signal when the user gazes at the target pattern symbol, and determine whether the user has focused their attention to complete the training task based on the second steady-state visual evoked potential signal; When the user is determined to have focused attention on completing the training task, a transcutaneous electrical nerve stimulation signal is emitted from an electrical stimulator placed on the user's neck, with the stimulator located on the side that the user is ignoring. The unilateral spatial neglect rehabilitation training method as described in claim 1, characterized in that, before controlling at least two target pattern symbols on the display to move within the spatial range of unilateral visual neglect by the user in a specific direction and at a specific speed, the method further includes: Get the maximum displacement of the user's eyeball while reading a single line of moving sample text on the monitor; The critical line for unilateral visual neglect by the user is determined based on the maximum displacement, and the spatial range for unilateral visual neglect by the user is determined based on the critical line. The unilateral spatial neglect rehabilitation training method as described in claim 2, characterized in that, before controlling at least two target pattern symbols on the display to move within the spatial range of unilateral visual neglect by the user in a specific direction and at a specific speed, the method further includes: Obtain the average eye movement velocity of the user's eyes while reading a single line of moving sample text on the monitor; A specific movement speed is determined based on the average eye movement speed. The unilateral spatial neglect rehabilitation training method as described in claim 1, characterized in that, judging whether the user's attention is sufficiently focused based on the first steady-state visual evoked potential signal includes: The first steady-state visual evoked potential signal is decoded and classified to obtain a first classification label; The user's classification accuracy is obtained by comparing the first category label with the preset label; When the classification accuracy reaches a specified percentage, it is determined that the user's attention is sufficiently focused. The unilateral spatial neglect rehabilitation training method as described in any one of claims 1 to 4, characterized in that determining whether the user has focused their attention to complete the training task based on the second steady-state visual evoked potential signal includes: The second steady-state visual evoked potential signal is decoded and classified to obtain a second classification label; When the second category label is the same as the prompt label corresponding to the target pattern symbol, it is determined that the user has focused their attention to complete the training task. A unilateral spatial neglect rehabilitation training device, characterized in that it comprises: The test unit is used to control multiple pattern symbols to flash randomly at different flashing frequencies at multiple positions on the display. The first acquisition unit is used to acquire the first steady-state visual evoked potential signal of the user's gaze at the display; The first judgment unit is used to determine whether the user's attention is sufficiently focused based on the first steady-state visual evoked potential signal. The training unit is used to control at least two target pattern symbols on the display to move within a space that is visually ignored on one side of the user's side, with a specific movement direction and a specific movement speed, when it is determined that the user's attention is sufficiently focused; wherein, the specific movement direction is from the healthy side to the ignored side, and the target pattern symbols are any pattern symbols from a plurality of pattern symbols; The second acquisition unit is used to acquire the second steady-state visual evoked potential signal when the user gazes at the target pattern symbol; The second judgment unit is used to determine whether the user has focused their attention to complete the training task based on the second steady-state visual evoked potential signal. An electrical stimulation unit is used to control an electrical stimulator placed on the user's neck to emit transcutaneous electrical stimulation signals when the user is determined to be concentrating on completing a training task. The electrical stimulator is located on the side that the user ignores. The unilateral spatial neglect rehabilitation training device as described in claim 6, characterized in that it further comprises: The first acquisition unit is used to acquire the maximum displacement of the user's eyeball during the process of reading a single line of moving example text on the display before the training unit controls at least two target pattern symbols on the display to move within a space that is ignored by the user's unilateral visual perception, in a specific moving direction and at a specific moving speed. The range determination unit is used to determine the critical line for unilateral visual neglect by the user based on the maximum displacement, and to determine the spatial range for unilateral visual neglect by the user based on the critical line. The unilateral spatial neglect rehabilitation training device as described in claim 7, characterized in that it further comprises: The second acquisition unit is used to acquire the average eye movement speed of the user's eyeballs during the process of reading a single line of moving example text on the display before the training unit controls at least two target pattern symbols on the display to move within a space that is ignored by the user's unilateral vision in a specific moving direction and at a specific moving speed. A velocity determination unit is used to determine a specific movement speed based on the average eye movement speed. An electronic device, characterized in that it includes a memory storing executable program code and a processor coupled to the memory; the processor calls the executable program code stored in the memory to execute the unilateral spatial neglect rehabilitation training method according to any one of claims 1 to 5. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, wherein the computer program causes a computer to perform the unilateral spatial neglect rehabilitation training method according to any one of claims 1 to 5.