Cerebral plasticity after subcortical stroke as revealed by cortico-muscular coherence.
The latency estimation of cortico-muscular coherence (CMCoh) could provide valuable information, especially for the pathological study. However, the conduction time from the central cortical rhythm to peripheral oscillations has not been explored for stroke patients. In this study one recently proposed method, maximizing coherence, was applied into the coherence analysis to estimate the latency by which the extensor carpi radialis electromyographic signals lagged behind the electroencephalographic time series with seven subcortical stroke subjects. Significantly prolonged conduction time was found in affected sides compared with the unaffected sides. The interhemispheric spatial displacement was also calculated using electrodes projection optimization and spherical surface laplacian. The results showed that the CMCoh could help investigate the cerebral reorganization after stroke.
Meng
Fei
F
Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China. mf99@mails.tsinghua.edu.cn
Tong
Kai-Yu
KY
Chan
Suk-Tak
ST
Wong
Wan-Wa
WW
Lui
Ka-Him
KH
Tang
Kwok-Wing
KW
Gao
Xiaorong
X
Gao
Shangkai
S
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009044:Motor Cortex / Q000503:physiopathology*; D009119:Muscle Contraction; D018482:Muscle, Skeletal / Q000503:physiopathology*; D009431:Neural Conduction; D009473:Neuronal Plasticity; D010291:Paresis / Q000503:physiopathology*; D020521:Stroke / Q000150:complications / Q000503:physiopathology*; D055815:Young Adult