Lenkov D N, Pavlovskaya G G
Neurosci Behav Physiol. 1985 May-Jun;15(3):214-20. doi: 10.1007/BF01182989.
Motor and EMG responses of the limbs to intracortical microstimulation (IM) were studied in 14 rabbits. The motor representations (MR) of contralateral limbs are separately located in the neocortex. The zone of wrist control lies in the center the MR of the forepaw, surrounded by the zones of the forearm and shoulder. Efforts to obtain isolated responses of the digits to IM were not successful. We did not observe a geometrical pattern of organization in the more caudally placed MR of the hindleg, where IM elicited isolated responses in the muscles of the lower leg and the haunch. Minimal thresholds of IM reached 3-10 microA for the MR of the shoulder and forearm, but were as high as 30-200 microA in the MR of the haunch and lower leg. The latent periods of the EMG responses lasted 25-52 msec for the shoulder, 24-73 msec for the forearm, 32-54 msec for the haunch, and 36-71 msec for the lower leg. We conclude that the organization involved in the cortical regulation of limb movement in rabbits is primitive, especially where movement of the hindlimb is involved.
在14只兔子身上研究了肢体对皮质内微刺激（IM）的运动和肌电图反应。对侧肢体的运动代表区（MR）分别位于新皮质中。腕部控制区位于前爪MR的中心，周围是前臂和肩部区域。试图获得手指对IM的孤立反应未成功。在更靠尾侧的后肢MR中，我们没有观察到组织的几何模式，在该区域IM在后腿和臀部的肌肉中引发了孤立反应。肩部和前臂MR的IM最小阈值达到3 - 10微安，但臀部和小腿MR的阈值高达30 - 200微安。肩部肌电图反应的潜伏期持续25 - 52毫秒，前臂为24 - 73毫秒，臀部为32 - 54毫秒，小腿为36 - 71毫秒。我们得出结论，兔子肢体运动的皮质调节所涉及的组织是原始的，特别是涉及后肢运动的情况。
