Examination ofgeneration mechanisms behind corticomuscular coherence from a standpoint of somatosensory afferent feedback
| Project/Area Number |
23700683
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Physical education
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| Research Institution | Keio University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 運動皮質 / Ia求心性神経 / 緊張性振動反射 / 骨格筋 / 振動刺激 / 運動単位 |
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| 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.
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Report
(3 results)
Research Products
(22 results)
