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Method for optimizing audio-visual cognitive event-related potential experimental paradigm

A technology of event-related potential and optimization method, applied in the direction of mechanical mode conversion, computer components, input/output of user/computer interaction, etc. The effect of efficiency

Active Publication Date: 2012-11-28
TIANJIN UNIV
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Problems solved by technology

[0007] The correlative potential experimental paradigm of combined audio-visual stimulation in the prior art does not optimize the stimulation mode and sequence parameters of the Oddball sequence in the combined stimulation received by each subject to obtain the individual differences. The optimal Oddball sequence cannot achieve the highest recognition accuracy and the execution efficiency of the BCI system

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  • Method for optimizing audio-visual cognitive event-related potential experimental paradigm
  • Method for optimizing audio-visual cognitive event-related potential experimental paradigm

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] In order to optimize and construct the Oddball sequence of joint stimulation mode for cognitive tasks, obtain the optimal Oddball sequence for each subject, reduce the influence of individual differences on the correct rate of target stimulus recognition in the BCI system, and improve the execution efficiency of the BCI system, see figure 1 with figure 2 , the embodiment of the present invention provides an audio-visual cognitive event-related brain electrical stimulation method, see the following description for details:

[0022] The subjects are 10-20 normal adults (about 20-40 years old, half male and half male, healthy physically and mentally, without mental or psychological barriers).

[0023] 101: For each subject, cond...

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Abstract

The invention discloses a method for optimizing an audio-visual cognitive event-related potential experimental paradigm. The method comprises the following steps of: on the basis of two first optimal Oddball sequences, performing combined stimulation of different matching modes of target stimulation and background stimulation modes on each subject respectively to induce a cognitive electroencephalographic experiment, establishing a plurality of second Oddball sequences, synchronously recording a plurality of second electroencephalographic signals, performing off-line analysis, and acquiring a plurality of second event-related potential data; acquiring the second Oddball sequence which corresponds to the second event-related potential data with the highest identification correct rate, wherein the second Oddball sequence is taken as a second optimal Oddball sequence of each subject; and gradually changing the appearance proportion of target stimulation, the duration and the stimulation interval of each subject in the second optimal Oddball sequence to induce cognitive electroencephalographic signals, acquiring a plurality of event-related potential data respectively, performing off-line analysis, and constructing an effective Oddball sequence scheme. The method is used for the auxiliary identification of the target stimulation, and can accurately position the target stimulation.

Description

technical field [0001] The invention relates to the technical field of BCI, in particular to an optimization method of an audio-visual cognition event-related potential experimental paradigm. Background technique [0002] The definition of Brain-computer interface is: "BCI (Brain-Computer Interface) is a communication control system that does not depend on the normal output channels of the peripheral nerves and muscles of the brain." In the current research results, the BCI system mainly It collects and analyzes the EEG signals of people in different states, extracts the EEG information characteristics reflecting the user's intention through signal processing, and converts them into operation commands for controlling external devices. It can provide a new way to communicate and control information with the outside world for the disabled, especially those who have lost basic language and limb motor functions but have normal thinking. That is, you can directly express your wi...

Claims

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Application Information

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IPC IPC(8): A61B5/0476G06F3/01
Inventor 付兰万柏坤綦宏志陈龙许敏鹏安兴伟明东
Owner TIANJIN UNIV
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