Corticomuscular coherence during bilateral isometric arm voluntary activity in healthy humans

Monica A. Perez, Demetris S. Soteropoulos, Stuart N. Baker

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

Bilateral voluntary contractions involve functional changes in both primary motor cortices. We investigated whether a voluntary contraction controlled by one hemisphere can influence oscillatory processes contralaterally. Corticomuscular coherence was calculated between EEG recorded over the motor cortex hand representation and electromyogram from the first dorsal interosseous muscle when the nondominant hand performed a precision grip task. The dominant arm remained at rest or performed a finger abduction or an elbow flexion task at 10, 40, and 70% of maximal isometric voluntary contraction (MVC). Mean coherence in the 15- to 30-Hz range in the hand performing a precision grip increased during 40% (by 72%) and 70% (by 73%) but not during 10% of MVC in the finger abduction task. Similarly, in the elbow flexion task, mean coherence increased during 40% (by 40%) and 70% (by 48%) but not during 10% of MVC. No differences were observed between the increments in coherence between the finger abduction and elbow flexion tasks at a given force level. We speculate that these results reflect the increased complexity of controlling a fine motor task with one hand while performing a strong contraction with the contralateral hand and suggest that increased oscillatory corticomuscular coupling may contribute to successful task performance.

Original languageEnglish (US)
Pages (from-to)2154-2162
Number of pages9
JournalJournal of neurophysiology
Volume107
Issue number8
DOIs
StatePublished - Apr 15 2012

Keywords

  • Corticospinal drive
  • Oscillations
  • Primary motor cortex
  • Sensorimotor
  • β-Band

ASJC Scopus subject areas

  • Neuroscience(all)
  • Physiology

Fingerprint Dive into the research topics of 'Corticomuscular coherence during bilateral isometric arm voluntary activity in healthy humans'. Together they form a unique fingerprint.

  • Cite this