Abstract
This study investigated the modulation of somatosensory evoked potentials (SEPs) during precisely controlled force generation and force relaxation in a visuomotor tracking task. Subjects were instructed to track a target line with a line that represented their own force generated by grip movement with the right hand as accurately as possible during concurrent electrical stimulation. The target force line moved up continuously from 0 to 20 % of maximal voluntary contraction (MVC) (the force generation phase: FG phase) and moved down from 20 to 0 % of MVC (the force relaxation phase: FR phase) in 7 s at a constant velocity. We separately obtained SEPs following electrical stimulation of the median nerve at the wrist in each phase. During the visuomotor tracking task, compared with the stationary condition, the N30 at Fz and P27 at C3′ showed a significant reduction in amplitude in the FG and FR phases. In addition, the N30 and P27 were significantly smaller in amplitude in the FG than FR phase. Although the average amount of force exertion was the same in the FG and FR phases, the modulation of SEP amplitude was larger in the FG phase. These results indicated that sensorimotor integration in the somatosensory area was dependent on the context of movement exertion.
| Original language | English |
|---|---|
| Pages (from-to) | 227-233 |
| Number of pages | 7 |
| Journal | Experimental Brain Research |
| Volume | 219 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2012 May |
Fingerprint
Keywords
- Force generation
- Force relaxation
- Gating
- Sensorimotor integration
- SEPs
ASJC Scopus subject areas
- Neuroscience(all)
Cite this
Modulation of somatosensory evoked potentials during force generation and relaxation. / Wasaka, Toshiaki; Kida, Tetsuo; Kakigi, Ryusuke.
In: Experimental Brain Research, Vol. 219, No. 2, 05.2012, p. 227-233.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Modulation of somatosensory evoked potentials during force generation and relaxation
AU - Wasaka, Toshiaki
AU - Kida, Tetsuo
AU - Kakigi, Ryusuke
PY - 2012/5
Y1 - 2012/5
N2 - This study investigated the modulation of somatosensory evoked potentials (SEPs) during precisely controlled force generation and force relaxation in a visuomotor tracking task. Subjects were instructed to track a target line with a line that represented their own force generated by grip movement with the right hand as accurately as possible during concurrent electrical stimulation. The target force line moved up continuously from 0 to 20 % of maximal voluntary contraction (MVC) (the force generation phase: FG phase) and moved down from 20 to 0 % of MVC (the force relaxation phase: FR phase) in 7 s at a constant velocity. We separately obtained SEPs following electrical stimulation of the median nerve at the wrist in each phase. During the visuomotor tracking task, compared with the stationary condition, the N30 at Fz and P27 at C3′ showed a significant reduction in amplitude in the FG and FR phases. In addition, the N30 and P27 were significantly smaller in amplitude in the FG than FR phase. Although the average amount of force exertion was the same in the FG and FR phases, the modulation of SEP amplitude was larger in the FG phase. These results indicated that sensorimotor integration in the somatosensory area was dependent on the context of movement exertion.
AB - This study investigated the modulation of somatosensory evoked potentials (SEPs) during precisely controlled force generation and force relaxation in a visuomotor tracking task. Subjects were instructed to track a target line with a line that represented their own force generated by grip movement with the right hand as accurately as possible during concurrent electrical stimulation. The target force line moved up continuously from 0 to 20 % of maximal voluntary contraction (MVC) (the force generation phase: FG phase) and moved down from 20 to 0 % of MVC (the force relaxation phase: FR phase) in 7 s at a constant velocity. We separately obtained SEPs following electrical stimulation of the median nerve at the wrist in each phase. During the visuomotor tracking task, compared with the stationary condition, the N30 at Fz and P27 at C3′ showed a significant reduction in amplitude in the FG and FR phases. In addition, the N30 and P27 were significantly smaller in amplitude in the FG than FR phase. Although the average amount of force exertion was the same in the FG and FR phases, the modulation of SEP amplitude was larger in the FG phase. These results indicated that sensorimotor integration in the somatosensory area was dependent on the context of movement exertion.
KW - Force generation
KW - Force relaxation
KW - Gating
KW - Sensorimotor integration
KW - SEPs
UR - http://www.scopus.com/inward/record.url?scp=84862866799&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84862866799&partnerID=8YFLogxK
U2 - 10.1007/s00221-012-3082-z
DO - 10.1007/s00221-012-3082-z
M3 - Article
C2 - 22460200
AN - SCOPUS:84862866799
VL - 219
SP - 227
EP - 233
JO - Experimental Brain Research
JF - Experimental Brain Research
SN - 0014-4819
IS - 2
ER -