Combining observation and imagery of an action enhances human corticospinal excitability

Masanori Sakamoto, Tetsuro Muraoka, Nobuaki Mizuguchi, Kazuyuki Kanosue

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

The present study investigated whether combining observation and imagery of an action increased corticospinal excitability over the effects of either manipulation performed alone. Corticospinal excitability was assessed by motor-evoked potentials in the biceps brachii muscle following transcranial magnetic stimulation over the motor cortex during observation, imagery or both. The action utilized was repetitive elbow flexion/extension. Simultaneous observation and imagery of the elbow action facilitated corticospinal excitability as compared to that recorded during observation or imagery alone. However, facilitation due to the combination of observation and imagery was not obtained when the participants imagined the action pattern while they observed the same action presented out of phase. These findings suggest that a combination of observation and imagery can enhance corticospinal excitability. This enhancement depends on phase consistency between the observed and imagined actions.

Original languageEnglish
Pages (from-to)23-27
Number of pages5
JournalNeuroscience Research
Volume65
Issue number1
DOIs
Publication statusPublished - 2009 Sep 1

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Keywords

  • Corticospinal excitability
  • Imagery
  • Motor-evoked potentials
  • Observation
  • Transcranial magnetic stimulation

ASJC Scopus subject areas

  • Neuroscience(all)

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