A hybrid brain-computer interface target presentation method and device
A brain-computer interface and target technology, which is applied in the field of hybrid brain-computer interface target presentation methods and devices, can solve problems such as poor correlation and reduce visual attention, and achieve the goals of reducing difficulty, enhancing the sense of image, and improving correlation Effect
Active Publication Date: 2022-05-13
INST OF BIOMEDICAL ENG CHINESE ACAD OF MEDICAL SCI
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Problems solved by technology
[0005] In the above-mentioned existing schemes, in order to induce a stable steady-state visual evoked potential, the stimulation keys used for flashing all use components such as squares or arrows, and the observer needs to focus visual attention on such components for flashing. In terms of stimulation, it is also necessary to perform motor imagery tasks on components such as the above-mentioned squares or arrows. The correlation between the two tasks performed by these methods is poor, and it is easy to forget motor imagery or focus on imagery and reduce visual attention. Force situation
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[0070] In one example, such as figure 2 As shown, the present disclosure also provides a specific embodiment of target presentation of a hybrid brain-computer interface using the above method, as follows:
[0071] 201. Determine three body parts, and each body part corresponds to three groups of target pictures;
[0072] In this scheme, a total of 9 groups of target pictures are collected, which are the target pictures in the set corresponding to the left hand, and the flickering frequencies are , , , the switching frequency is , , ; For the target pictures in the set corresponding to the right hand, the flickering frequency is , , , the switching frequency is , , ;The target pictures in the set corresponding to both feet, the flickering frequency is respectively , , , the switching frequency is , , .
[0073] 202, select the screen refresh rate as 120 The display unit determines corresponding flickering frequency and switching frequency ...
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The present disclosure provides a target presentation method and device for a hybrid brain-computer interface, including collecting a target picture, the content of the target picture is a body part; the body part corresponds to the first motion state and the second motion state, and the target picture includes a body part corresponding to the first motion state. The first state sub-picture of the state and the second state sub-picture corresponding to the second motion state; determine the switching frequency and the flickering frequency of the target picture; present the target picture to guide the user to perform the motor imagery task when the user gazes at the target picture, and present In the target picture, the sub-picture in the first state and the sub-picture in the second state are switched at a switching frequency, and the sub-picture in the first state and the sub-picture in the second state are both flickering at a flickering frequency.
Description
technical field [0001] The present disclosure relates to the technical field of brain-computer interface, and in particular to a hybrid brain-computer interface target presentation method and device. Background technique [0002] A brain-computer interface is a communication or control system that decodes the neural activity of the brain into specific instructions and realizes the interaction between the brain and external devices. The non-invasive brain-computer interface uses non-invasive neuroimaging techniques to collect brain signals, such as functional magnetic resonance imaging, functional near-infrared imaging, magnetoencephalography, and electroencephalography. EEG has been widely used in brain-computer interface research due to its high temporal resolution, portability, and low cost. [0003] Steady-state visually evoked potential BCI and motor imagery BCI are two classic EEG-based single-modal BCIs. The steady-state visual evoked potential brain-computer interfa...
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IPC IPC(8): G06F3/01G06V40/20
CPCG06F3/011G06F3/015G06F2203/011
Inventor 陈小刚崔红岩迟新一
Owner INST OF BIOMEDICAL ENG CHINESE ACAD OF MEDICAL SCI