The modulation of corticospinal excitability during motor imagery of actions with objects

Nobuaki Mizuguchi, Masanori Sakamoto, Tetsuro Muraoka, Kento Nakagawa, Shoichi Kanazawa, Hiroki Nakata, Noriyoshi Moriyama, Kazuyuki Kanosue

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We investigated whether corticospinal excitability during motor imagery of actions (the power or the pincer grip) with objects was influenced by actually touching objects (tactile input) and by the congruency of posture with the imagined action (proprioceptive input). Corticospinal excitability was assessed by monitoring motor evoked potentials (MEPs) in the first dorsal interosseous following transcranial magnetic stimulation over the motor cortex. MEPs were recorded during imagery of the power grip of a larger-sized ball (7 cm) or the pincer grip of a smaller-sized ball (3 cm) -with or without passively holding the larger-sized ball with the holding posture or the smaller-sized ball with the pinching posture. During imagery of the power grip, MEPs amplitude was increased only while the actual posture was the same as the imagined action (the holding posture). On the other hand, during imagery of the pincer grip while touching the ball, MEPs amplitude was enhanced in both postures. To examine the pure effect of touching (tactile input), we recorded MEPs during imagery of the power and pincer grip while touching various areas of an open palm with a flat foam pad. The MEPs amplitude was not affected by the palmer touching. These findings suggest that corticospinal excitability during imagery with an object is modulated by actually touching an object through the combination of tactile and proprioceptive inputs.

Original languageEnglish
Article numbere26006
JournalPLoS One
Volume6
Issue number10
DOIs
Publication statusPublished - 2011 Oct 13

Fingerprint

Motor Evoked Potentials
evoked potentials
Imagery (Psychotherapy)
Hand Strength
posture
Posture
Bioelectric potentials
Modulation
Touch
Transcranial Magnetic Stimulation
Motor Cortex
foams
Foams
Power (Psychology)
monitoring
Monitoring

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

The modulation of corticospinal excitability during motor imagery of actions with objects. / Mizuguchi, Nobuaki; Sakamoto, Masanori; Muraoka, Tetsuro; Nakagawa, Kento; Kanazawa, Shoichi; Nakata, Hiroki; Moriyama, Noriyoshi; Kanosue, Kazuyuki.

In: PLoS One, Vol. 6, No. 10, e26006, 13.10.2011.

Research output: Contribution to journalArticle

Mizuguchi, Nobuaki ; Sakamoto, Masanori ; Muraoka, Tetsuro ; Nakagawa, Kento ; Kanazawa, Shoichi ; Nakata, Hiroki ; Moriyama, Noriyoshi ; Kanosue, Kazuyuki. / The modulation of corticospinal excitability during motor imagery of actions with objects. In: PLoS One. 2011 ; Vol. 6, No. 10.
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