Buchthal F
Muscle Nerve. 1982;5(9S):S52-9.
Spontaneous electrical activity of muscle originates either from one, a few, or a large number of muscle fibers; the responses from the latter are similar to those of motor units. Responses from one or a few fibers are those arising in the end-plate zone of normal muscle and the electrical activity is associated with denervation and myotonia. The motor unit-like activity may either be discharged at randomly varying intervals, as in fasciculations, or at intervals similar to the discharges during voluntary effort, as in hemifacial spasm, Isaacs' syndrome, and in infantile spinal muscular atrophy.
肌肉的自发电活动起源于一根、几根或大量肌纤维；大量肌纤维产生的反应与运动单位的反应相似。一根或几根肌纤维产生的反应源于正常肌肉的终板区，其电活动与去神经支配和肌强直有关。类似运动单位的活动可能以随机变化的间隔发放，如肌束震颤，或以与随意用力时发放相似的间隔发放，如面肌痉挛、艾萨克综合征和婴儿型脊髓性肌萎缩。
