Stein P S
Department of Biology, Washington University, St. Louis, MO 63130.
Acta Biol Hung. 1988;39(2-3):155-60.
We reveal the intrinsic motor capacity of the spinal cord by examining motor behaviours produced by spinal segments caudal to a complete transection of the spinal cord. The turtle spinal cord generates three forms of the scratch reflex in the absence of neural inputs from supraspinal structures. Each form exhibits a characteristic motor neuron discharge pattern. We test the ability of the spinal cord to generate organized motor patterns in the absence of movement-related sensory feedback by examining motor neuron discharge patterns in spinal preparations that are immobilized with a neuromuscular blocking agent. The motor neuron discharge pattern associate with each form is observed in the spinal immobilized preparation. Each of these motor patterns is therefore generated centrally within the spinal cord.
我们通过检查脊髓完全横断后尾侧脊髓节段产生的运动行为，揭示脊髓的内在运动能力。在没有来自脊髓上结构的神经输入的情况下，龟的脊髓会产生三种形式的搔抓反射。每种形式都表现出独特的运动神经元放电模式。我们通过检查用神经肌肉阻滞剂固定的脊髓标本中的运动神经元放电模式，来测试脊髓在没有与运动相关的感觉反馈的情况下产生有组织运动模式的能力。在脊髓固定标本中观察到与每种形式相关的运动神经元放电模式。因此，这些运动模式中的每一种都是在脊髓中央产生的。
