title: Cerebral plasticity after subcortical stroke as revealed by cortico-muscular coherence.
abstract: 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.
authors.affiliation: Department of Biomedical Engineering, Tsinghua University, Beijing 100084, China. mf99@mails.tsinghua.edu.cn
authors.forename: Fei
authors.initials: F
authors.lastname: Meng
authors.forename: Kai-Yu
authors.initials: KY
authors.lastname: Tong
authors.forename: Suk-Tak
authors.initials: ST
authors.lastname: Chan
authors.forename: Wan-Wa
authors.initials: WW
authors.lastname: Wong
authors.forename: Ka-Him
authors.initials: KH
authors.lastname: Lui
authors.forename: Kwok-Wing
authors.initials: KW
authors.lastname: Tang
authors.forename: Xiaorong
authors.initials: X
authors.lastname: Gao
authors.forename: Shangkai
authors.initials: S
authors.lastname: Gao
mesh_terms: 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