Department of Physiology, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA.
Neuron. 2009 Dec 10;64(5):593-5. doi: 10.1016/j.neuron.2009.11.030.
C boutons, a major synaptic input to motor neurons, were first described years ago, but their origin and functional significance were unknown. In this issue of Neuron, a group of cholinergic interneurons located near the central canal is identified as the source of C boutons. The rhythmic activity in these neurons during locomotion increases motor neuronal excitability, thereby potentiating the strength of muscle contraction.
C 触突是运动神经元的主要突触输入，多年前就已被描述，但它们的起源和功能意义尚不清楚。在本期《神经元》杂志中，一组位于中央管附近的胆碱能中间神经元被确定为 C 触突的来源。这些神经元在运动过程中的节律性活动增加了运动神经元的兴奋性，从而增强了肌肉收缩的强度。
