TY - JOUR
T1 - Influence of somatosensory input on corticospinal excitability during motor imagery
AU - Mizuguchi, Nobuaki
AU - Sakamoto, Masanori
AU - Muraoka, Tetsuro
AU - Moriyama, Noriyoshi
AU - Nakagawa, Kento
AU - Nakata, Hiroki
AU - Kanosue, Kazuyuki
N1 - Funding Information:
The authors thank Dr. Larry Crawshaw for English editing. This work was supported by a grant for the fellows of the Japan Society for the Promotion of Science (JSPS) awarded to N.M. and a Grant-in-Aid from the Global COE “Sport Sciences for the Promotion of Active Life”, Waseda University, from the Ministry of Education, Culture, Sports, Science and Technology of Japan .
PY - 2012/4/11
Y1 - 2012/4/11
N2 - Our previous studies showed that corticospinal excitability during imagery of squeezing a foam ball was enhanced by somatosensory input generated by passively holding the ball. In the present study, using the same experimental model, we investigated whether corticospinal excitability was influenced by holding the object with the hand opposite to the imagined hand. Corticospinal excitability was assessed by monitoring motor evoked potentials (MEPs) in the first dorsal interosseous muscle following transcranial magnetic stimulation over the motor cortex during motor imagery. Subjects were asked to imagine squeezing a foam ball with the right hand (experiment 1) or the left hand (experiment 2), while either holding nothing (Null condition), a ball in the right hand (Right condition) or a ball in the left hand (Left condition). The MEPs amplitude during motor imagery was increased, only when the holding hand and the imagined hand were on the same side. These results suggest that performance improvement and rehabilitation exercises will be more effective when somatosensory stimulation and motor imagery are done on the same side.
AB - Our previous studies showed that corticospinal excitability during imagery of squeezing a foam ball was enhanced by somatosensory input generated by passively holding the ball. In the present study, using the same experimental model, we investigated whether corticospinal excitability was influenced by holding the object with the hand opposite to the imagined hand. Corticospinal excitability was assessed by monitoring motor evoked potentials (MEPs) in the first dorsal interosseous muscle following transcranial magnetic stimulation over the motor cortex during motor imagery. Subjects were asked to imagine squeezing a foam ball with the right hand (experiment 1) or the left hand (experiment 2), while either holding nothing (Null condition), a ball in the right hand (Right condition) or a ball in the left hand (Left condition). The MEPs amplitude during motor imagery was increased, only when the holding hand and the imagined hand were on the same side. These results suggest that performance improvement and rehabilitation exercises will be more effective when somatosensory stimulation and motor imagery are done on the same side.
KW - Contralateral
KW - Corticospinal excitability
KW - Motor imagery
KW - Somatosensory
KW - Transcranial magnetic stimulation
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U2 - 10.1016/j.neulet.2012.02.073
DO - 10.1016/j.neulet.2012.02.073
M3 - Article
C2 - 22402190
AN - SCOPUS:84859000719
SN - 0304-3940
VL - 514
SP - 127
EP - 130
JO - Neuroscience Letters
JF - Neuroscience Letters
IS - 1
ER -