The correlation between working memory and motor imagery under transcranial electrical stimulation
Objective To study the correlation between brain network topology and characteristic parameters of working memory(WM)and motor imagery(MI)under transcranial direct current stimulation(tDCS).Methods After the subjects were stimulated,the EEG signals(EEG)of the right hand hand movement(stretching arm)and finger movement(holding cup of water in hand)were imagined by observing the plane pictures,and the EEG under the WM load of the third and fourth pictures of the subjects were used for comparative analysis.The changes of EEG network characteristics of MI and WM tasks with different difficulty were analyzed and the correlation of the change rate of the same EEG network characteristic parameters of MI and WM tasks with similar difficulty was verified.Results Following anodal transcranial direct current stimulation(tDCS),the network characteristic parameters in both motor imagery(MI)tasks and memory load tasks significantly increased compared to sham tDCS stimulation(P < 0.05).Additionally,there was a moderate positive correlation between the functional brain network parameters in the arm extension MI task and those in the three-figure load working memory(WM)task.A similar correlation was observed between the cup-grasping MI task and the four-figure load WM task.The intervention of anodal tDCS further enhanced these correlations.Conclusion Anodic tDCS not only enhances WM but also simultaneously improves the characteristics of MI brain network,and there is a positive correlation between them.
motor imageryworking memoryfunctional brain networktranscranial direct current stimulation
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NSTL
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