[Current information on the gamma motor system].
D009046:Motor Neurons / Q000502:physiology*; D009120:Muscle Cramp / Q000503:physiopathology; D009470:Muscle Spindles / Q000033:anatomy & histology / Q000502:physiology*; D009469:Neuromuscular Junction / Q000502:physiology*; D013035:Spasm / Q000503:physiopathology; D009435:Synaptic Transmission