Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/9453
Title: Study on connectivity between coherent central rhythm and electromyographic activities
Authors: Meng, F
Tong, KY
Chan, ST
Wong, WW
Lui, KH
Tang, KW
Gao, X
Gao, S
Issue Date: 2008
Publisher: IOP Publishing Ltd
Source: Journal of neural engineering, 2008, v. 5, no. 3, p. 324-332 How to cite?
Journal: Journal of Neural Engineering 
Abstract: Whether afferent feedback contributes to the generation of cortico-muscular coherence (CMCoh) remains an open question. In the present study, a multivariate autoregressive (MVAR) model and partial directed coherence (PDC) were applied to investigate the causal influences between the central rhythm and electromyographic (EMG) signals in the process of CMCoh. The system modeling included activities from the contralateral and ipsilateral primary sensorimotor cortex (M1/S1), supplementary motor area (SMA) and the time series from extensor carpi radialis (ECR) muscles. The results showed that afferent sensory feedback could also play an important role for the generation of CMCoh. Meanwhile, significant coherence between the EMG signals and the activities in the SMA was found in two subjects out of five. Connectivity analysis revealed a significant descending information flow which possibly reflected direct recruitment on the motoneurons from the SMA to facilitate motor control.
URI: http://hdl.handle.net/10397/9453
DOI: 10.1088/1741-2560/5/3/005
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