2012 Fiscal Year Final Research Report
Examination ofgeneration mechanisms behind corticomuscular coherence from a standpoint of somatosensory afferent feedback
| Project/Area Number |
23700683
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Physical education
|
|---|
| Research Institution | Keio University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2011 – 2012
|
| Keywords | 運動皮質 / Ia求心性神経 / 緊張性振動反射 |
|---|
| Research Abstract |
This study aimed to examine the contribution of somatosensory afferent feedback to generation of corticomuscular coherence observed during tonic isometric voluntary contraction. As results, I have obtained following findings:
1) The magnitude of corticomuscular coherence was decreased after prolonged tendon vibration, which is known as a technique attenuating Ia afferent feedback, in half of the participants;
2) Involuntary muscle activity induced by muscle or tendon vibration, so-called “tonic vibration reflex”, was significantly coupled with electroencephalogram activity over the sensorimotor cortex at around 20 Hz;
3) motor unit activities during tonic vibration reflex could be divided into the firing derived from spinal stretch reflex loop and the one derived from efferent input from the cortex.
|
Research Products
(11 results)
