把握運動は複数のフィードバックループによって制御されている

Spinal and cortical feedback loops differentially contribute to the control of the primate grasping

  • 武井 智彦 (国立精神・神経医療研究センター神経研究所モデル動物開発研究部)
  • 関 和彦 (国立精神・神経医療研究センター神経研究所モデル動物開発研究部)
  • Tomohiko Takei（National Institute of Neuroscience, Department of Neurophysiology）
  • Kazuhiko Seki（National Institute of Neuroscience, Department of Neurophysiology）

The contributions of the spinal reflex loop and the transcortical loop to the control of the voluntary movement are still unclear. Here we explore it by recording LFPs of spinal and cortical neurons and by examining their coherence with the EMG activities in monkeys performing a precision grip task. Spinomuscular (SMC) and corticomuscular coherence (CMC) showed a significant beta-band peak (~20Hz), and the directed coherence analysis revealed that they consisted of the bi-directional interactions. Interestingly, SMC and CMC emerged alternatively during the precision grip task. These results suggested that the two feedback loops are independently utilized for the control of hand grasping.
Last-modified: 2012-12-18 (火) 15:56:32