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Effects of motor imagery are dependent on motor strategies.

Authors
  • Liang, Nan
  • Ni, Zhen
  • Takahashi, Makoto
  • Murakami, Tsuneji
  • Yahagi, Susumu
  • Funase, Kozo
  • Kato, Takashi
  • Kasai, Tatsuya
Type
Published Article
Journal
Neuroreport
Publisher
Ovid Technologies (Wolters Kluwer) - Lippincott Williams & Wilkins
Publication Date
Aug 06, 2007
Volume
18
Issue
12
Pages
1241–1245
Identifiers
PMID: 17632275
Source
Medline
License
Unknown

Abstract

To investigate whether the facilitatory effects of motor imagery (MI) are dependent on motor strategies that vary with posture, we used transcranial magnetic stimulation to examine the effects of two forearm positions on motor-evoked potentials during an MI of index-finger abduction. MI-enhanced motor-evoked potentials of the first dorsal interosseous (prime mover) muscle in the forearm prone position were larger than those in the forearm neutral position. The opposite effects were seen in the extensor carpi radialis (synergist) muscle. These effects correspond to the different electromyography activities in the muscles when performing the actual movements in these two forearm positions. It is suggested that MI reflects different motor strategies in the contribution of agonist and synergist muscles towards a motor task.

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