上游充通大粤 2.肌肉的控制系统 SHANGHAI JIAO TONG UNIVERSITY Cell body of Gray Quadriceps sensory neuron in matter muscle dorsal root ganglion White- matter Hamstring muscle Spinal cord (cross section) ●Sensory neuron ●Motor neuron ●Interneuron https://www.gfsstp.comhttps://www.gfsstp.com 2. 肌肉的控制系统