Readiness Potential and Movement Initiation in the Rat
スポンサーリンク
概要
- 論文の詳細を見る
Cortical field potentials were recorded by electrodes implanted chronically on the surface and at a 2.0 mm depth in various cortical areas in the left hemisphere in the rat during self-paced movements of the right forelimb. A surface-negative (s-N), depth-positive (d-P) cortical field potential appeared about 1.0 s (range: 0.5–1.5 s) before movement onset in the rostral (RFA) and caudal (CFA) forelimb areas of the motor cortex, and the somatosensory cortex, but not in the occipital cortex. Bipolar recording of electromyographic activities induced by the electrical stimulation of various cortical loci was also performed by pairs of steel electrodes inserted in the face, trunk, forelimb and hindlimb muscles on both sides. The stimulation of the forelimb motor cortex activated the face and/or forelimb muscles, while that of the somatosensory cortex generally activated several body part muscles including the forelimb muscle. Stronger stimulus intensity was requested to elicit the activities of most of the ipsilateral muscles to the cortex stimulated than the contralateral ones. The minimum intensity for inducing the forelimb muscle activity was lowest in the CFA among cortical areas producing the activity. The stimulation of cortical loci in which the s-N, d-P potential was recorded could induce muscle activities in the forelimb contralateral to the stimulation. It is suggested that the s-N, d-P potential is the readiness potential for activating muscles to initiate movement in the rat forelimb.
- 日本生理学会の論文
日本生理学会 | 論文
- 大脳基底核の機能 : パーキンソン病との関連において
- 低温環境下で飼育したカエルの前根電位の変化
- 2,5-ヘキサンジオン投与によるラット会陰筋のミオシン重鎖アイソフォーム成分の変化
- 後肢懸垂によるラットヒラメ筋線維のミオシン重鎖アイソフォーム発現パターンの変化
- 生体における酸素の効率的利用機構