Changes in cortical excitability during and just before motor imagery

Koji Aono, Mitsuhiko Kodama, Yoshihisa Masakado, Yoshihiro Muraoka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Objective: Changes in cortical excitability during motor imagery were investigated in order to reveal the effect of hand dominance. During motor imagery, motor evoked potentials (MEPs) were recorded from the first dorsal interosseous (FDI) muscle of the dominant hand using transcranial magnetic stimulation (TMS). Methods: Twelve healthy right-handed subjects participated. Three motor imagery tasks (MITs) were provided; dominant hand grasping, non-dominant hand grasping, and ankle dorsiflexion ipsilateral to the dominant hand. MEPs were also recorded from the FDI muscle of the non-dominant hand during the same tasks. Result: MEPs increased significantly in the dominant hand during MIT, just before MIT of the dominant hand, and prior to ankle dorsiflexion ipsilateral to the dominant hand. MEPs obtained from the FDI muscle of the dominant hand during MITs were greater than that obtained from the FDI muscle of the non-dominant hand. However, this difference was not significant. Conclusion: The left primary motor cortex (M1) was more excited than M1 during MITs of the hand muscles. Cortical excitability increased just before MIT of the contralateral hand and leg muscles.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalTokai Journal of Experimental and Clinical Medicine
Volume38
Issue number1
Publication statusPublished - 2013 Apr 1

Keywords

  • Cortical excitability
  • Lateralization
  • Motor evoked potential
  • Motor imagery
  • Transcranial magnetic stimulation

ASJC Scopus subject areas

  • Medicine(all)

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