Influence of nerve supply on hand electromyography coherence during a three-digit task

Cristian F. Pasluosta, Mathieu M. Domalain, Yin Fang, Guang H. Yue, Zong Ming Li

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Intermuscular coupling has been investigated to understand neural inputs to coordinate muscles in a motor performance. However, little is known on the role of nerve innervation on intermuscular coupling. The purpose of this study was to investigate how the anatomy of nerve distribution affected intermuscular coupling in the hand during static grip. Electromyographic (EMG) signals were recorded from intrinsic and extrinsic muscles while subjects performed a static grip. Coherence was computed for muscle pairs innervated by either the same or different nerves. The results did not support the hypothesis that muscles sharing the same nerve exhibit greater coupling than muscles innervated by different nerves. In general, extrinsic muscle pairs displayed higher coherence than intrinsic pairs. The results suggest that intermuscular coupling in a voluntary motor task is likely modulated in a functional manner and that different nerves might transport common neural inputs to functionally coupled muscles.

Original languageEnglish (US)
Pages (from-to)594-599
Number of pages6
JournalJournal of Electromyography and Kinesiology
Issue number3
StatePublished - Jun 2013
Externally publishedYes


  • Coherence
  • Coupling
  • Electromyography
  • Hand muscles
  • Innervations

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Biophysics
  • Clinical Neurology


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