Serratrice G, Azulay J P, Serratrice J, Pouget J
Cliniques des Maladies du Système nerveux et de l'Appareil locomoteur, Hopital de la Timone, Marseille, France.
J Neurol Neurosurg Psychiatry. 1995 Aug;59(2):182-4. doi: 10.1136/jnnp.59.2.182.
Palmaris brevis spasm syndrome is a rare and benign condition of localised muscular hyperactivity. In five men, the hypothenar eminence underwent spontaneous, irregular, tonic contractions of the palmaris brevis muscle. An EMG showed spontaneous high frequency discharges of normal motor units, without evidence of neuropathy or of nerve compression. This syndrome resembles other restricted muscle hyperactivity syndromes although there are some differences. Curiously, the palmaris brevis muscle is not under voluntary control. The mechanism of the syndrome could be an ephaptic transmission possibly secondary to the transient and repeated stretching of the ulnar nerve superficial branch. In one patient a root compression was the probable origin.
掌短肌痉挛综合征是一种罕见的局限性肌肉活动亢进的良性病症。在五名男性患者中，小鱼际肌出现了掌短肌的自发性、不规则、强直性收缩。肌电图显示正常运动单位的自发性高频放电，没有神经病变或神经受压的证据。尽管存在一些差异，但该综合征与其他局限性肌肉活动亢进综合征相似。奇怪的是，掌短肌不受自主控制。该综合征的机制可能是一种ephaptic传导，可能继发于尺神经浅支的短暂反复拉伸。在一名患者中，神经根受压可能是病因。
