The dynamic functional connectivity of brain network during motor imagination and execution of upper limbs based on EEG signals
10.3969/j.issn.1001-1242.2024.03.004
- VernacularTitle:基于脑电信号的上肢运动想象与运动执行脑网络的动态功能连接研究
- Author:
Jinglu HU
1
;
Dongju GUO
;
Dezheng WANG
Author Information
1. 山东大学齐鲁医院康复科,山东省济南市,250012
- Keywords:
motor execution;
motor imagination;
functional connectivity;
pearson correlation;
isolated movement
- From:
Chinese Journal of Rehabilitation Medicine
2024;39(3):326-333
- CountryChina
- Language:Chinese
-
Abstract:
Objective:The electroencephalogram(EEG)signals were collected for analysis to define the differences in dy-namic functional connectivity of the brain network of related nodes in the primary motor area(M1)and pre-motor area(PMA)during motor imagination and motor execution.The relationship between muscle synergy and isolated movement was also explored. Method:Ten stroke patients with right hemiplegia and nineteen healthy adults participated in this study.All participants performed motor imagination(MI)and motor execution(ME)tasks according to visual instruc-tions.We recorded and analyzed the EEG signals at 12 sites located in Ml and PMA areas.The chosen EEG signals were filtered and analyzed based on the modified S-transform(MST).All data were normalized to avoid individual differences.Then we analyzed the data with Pearson correlation to identify the dynamic func-tional connectivity(FC)and the differences with Fisher's exact test for node degrees. Result:All the distribution trend of correlation degree of chosen node about left or right MI and ME of stroke patients was similar to that of healthy participants.Compared with the motion execution,the function connection strength and density of each node were elevated at MI,which was also consistent with healthy par-ticipants.When healthy adults underwent left hand MI,the degree of the C4 node in the Ml area was signifi-cantly higher than that of C3 on the opposite side(P＜0.05),while at right hand MI,the sum of the node de-grees of FC3 and FC1 in the left PMA area was significantly higher than that of the lateral symmetric chan-nel FC4 and FC2(P＜0.05).When the right upper limb isolated movement was performed,the node degree of C3 decreased significantly(P＜0.05). Conclusion:The major region of function connectivity of the right hand MI was in the left PMA area,and the node degree at MI was higher than ME.The functional connectivity of each node at the left hand MI was dispersed.The main channels activated by the muscle synergy are different from the isolated movement.
