Attention regulating method based on transcranial direct current stimulation

An attention, direct current technology, applied in the field of neural regulation and attention evaluation, can solve the problems of unclear regulation effect, rare, lack of objective evaluation indicators of regulation effect, etc., and achieve considerable social benefits.

Pending Publication Date: 2019-04-09
TIANJIN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above studies have proved that tDCS can regulate the cognitive affective disorder of depressed patients and improve the cognitive function of healthy subjects. Involves the frontal cortex tDCS on the ERP research of facial emotion processing, and lacks objective evaluation indicators

Method used

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  • Attention regulating method based on transcranial direct current stimulation
  • Attention regulating method based on transcranial direct current stimulation
  • Attention regulating method based on transcranial direct current stimulation

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Experimental program
Comparison scheme
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Embodiment 1

[0039] A method of attention regulation based on transcranial direct current stimulation, see figure 1 , the method includes the following steps:

[0040] 101: Write the stimulation interface with Psychtoolbox, present the interface through the computer monitor, collect and save the EEG signal and behavioral data under the Oddball task state;

[0041] 102: Perform tDCS neural regulation on the EEG signal, and further collect data after the regulation;

[0042] 103: Preprocess the EEG data before and after regulation by downsampling, filtering, data segmentation, etc., and then use the coherent average algorithm to calculate the P300 difference between positive and negative emotions. index;

[0043] 104: Calculate the classification accuracy rate under positive and negative emotions through behavioral data, and extract the emotion misclassification rate as the regulation effect;

[0044] 105: Compare the changes of electrophysiological indicators and behavioral indicators befo...

Embodiment 2

[0047] Combine below figure 1 , figure 2 , and specific examples further introduce the scheme in embodiment 1, see the following description for details:

[0048] 1. Data collection

[0049] The Oddball task in the embodiment of the present invention requires the subject to press buttons to respond to positive emotions or negative emotions in the experiment. The experiment included 6 bloks (modules), of which 3 bloks required subjects to press buttons on faces with positive emotions, and 3 bloks needed to make button responses to faces with negative emotions. Each blok was neutral, positive, and negative. The faces of the sexual emotions alternate randomly in a ratio of 7:1.5:1.5.

[0050] The flow of a single trial in the stimulus interface and the sequence of faces that may appear in the stimulus are as follows figure 2 As shown, during the experiment, the subjects sat on a chair about one meter away from the monitor, stared at the screen and followed the prompts to co...

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Abstract

The invention discloses an attention regulating method based on transcranial direct current stimulation. The method comprises the following steps: sequentially carrying out downsampling, filtering anddata striping preprocessing on EEG data before and after the transcranial direct current stimulation; calculating a P300 difference value in positive and negative emotions by using a coherent averaging algorithm, and taking the P300 difference value as an electrophysiological index for evaluating the regulating effect; calculating classification accuracy in the positive and negative emotions through behavioral data, and extracting the emotion error rate to serve as the regulation effect; comparing the change conditions of the electrophysiological indexes and behavioral indicators before and after regulation, and comprehensively evaluating the regulation effect according to a P300 difference value index and an emotion error rate index, so as to obtain a final regulation effect. According to the attention regulating method disclosed by the invention, the problem that evaluation and detection of emotional attention mainly rely on scale and subjective scoring, which leads to poor objectivity is solved.

Description

technical field [0001] The invention relates to the fields of neural regulation and attention evaluation, in particular to an attention regulation method based on transcranial direct current stimulation. Background technique [0002] In the context of emotional processing, selective attention is a key mechanism that determines how the body perceives and interprets emotional information in the environment. More and more studies have shown that people have a bias in processing and responding to negative information, that is, compared with neutral The human brain is more sensitive to negative stimuli, and the body's special sensitivity to negative emotions in the environment becomes the negative bias of emotions. In cognitive tasks, negativity bias is mainly manifested in three aspects, one is increased attention to negative information, the other is insufficient attention to positive information, and the other is negative interference information Insufficient suppression. Co...

Claims

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Application Information

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IPC IPC(8): A61N1/20
CPCA61N1/20
Inventor 郭冬月刘爽明东刘潇雅盛悦何雨晨张力新
Owner TIANJIN UNIV
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