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 language | English |
|---|---|
| Article number | e26006 |
| Journal | PLoS One |
| Volume | 6 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2011 Oct 13 |
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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 journal › Article
}
TY - JOUR
T1 - The modulation of corticospinal excitability during motor imagery of actions with objects
AU - Mizuguchi, Nobuaki
AU - Sakamoto, Masanori
AU - Muraoka, Tetsuro
AU - Nakagawa, Kento
AU - Kanazawa, Shoichi
AU - Nakata, Hiroki
AU - Moriyama, Noriyoshi
AU - Kanosue, Kazuyuki
PY - 2011/10/13
Y1 - 2011/10/13
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=80054067078&partnerID=8YFLogxK
U2 - 10.1371/journal.pone.0026006
DO - 10.1371/journal.pone.0026006
M3 - Article
C2 - 22022491
AN - SCOPUS:80054067078
VL - 6
JO - PLoS One
JF - PLoS One
SN - 1932-6203
IS - 10
M1 - e26006
ER -