Research on the electroencephalogram characteristics of motor imagery guided by synchronous action hearing and observation
10.16289/j.cnki.1002-0837.2024.03002
- VernacularTitle:运动想象同步视听刺激的脑电特征研究
- Author:
Yiming HE
1
;
Zhizeng LUO
Author Information
1. 杭州电子科技大学智能控制与机器人研究所,杭州 310018
- Keywords:
motor imagery;
synchronous action observation;
synchronous action hearing;
the event-related desynchronization;
correlation coefficient of multivariate power spectrum
- From:Space Medicine & Medical Engineering
2024;35(3):143-148,172
- CountryChina
- Language:Chinese
-
Abstract:
Objective Active rehabilitation based on motor imagery(MI)is believed to help in the reshaping of the sensorimotor cortex.This study aims to investigate the activation of the sensorimotor cortex under visual and auditory guidance and its correlation,providing neurophysiological basis for audiovisual-assisted MI.Methods Participants were instructed to imagine flexing and lifting the left arm during training,while watching a video or hearing a corresponding audio command,constituting visual or auditory guidance for the left arm movement.The changes in the rate of variations in EEG μ rhythm event-related desynchronization(ERD)band energy in the associated brain areas and the multivariate power spectrum correlation coefficient between channels in the sensorimotor cortex were analyzed to characterize brain activity and correlation.Results Experimental results comparing the characteristics of MI,MI guided by synchronous action observation,MI guided by synchronous action hearing,and MI guided by synchronous action hearing and observation guidance showed that ERD measurements were in the order of MI guided by synchronous action hearing and observation>MI guided by synchronous action observation>MI guided by synchronous action hearing>MI.The multivariate power spectrum correlation coefficient for C4 channel with O1,Oz,and O2 channels was highest in the MI guided by synchronous action hearing and observation group and second highest in the MI guided by synchronous action observation group,with no clear differences between the other two groups.For C4 channel with T7 and T8 channels,the MI guided by synchronous action hearing group had the highest correlation,followed by the MI guided by synchronous action hearing and observation group,with no significant differences between the other two groups.The O1,Oz,and O2 channels with T7 and T8 channels showed the highest correlation in the MI guided by synchronous action hearing and observation group,with no clear differences between the other three groups.Conclusion MI synchronized with visual and auditory stimulation of imagined actions can significantly enhance sensorimotor cortex activity and strengthen functional connectivity between cortical regions,especially with the addition of audiovisual guidance.
