Rothwell J C, Traub M M, Marsden C D
J Neurol Neurosurg Psychiatry. 1979 Dec;42(12):1106-14. doi: 10.1136/jnnp.42.12.1106.
We describe a patient who complained of jerking of the right forearm on writing. Active pronation of his arm produced several beats of pronation/supination tremor. A burst of tremor also could be elicited by tendon taps to the volar surface of the wrist, to the finger extensors, and to pectoralis major, and by forcible supination of the wrist delivered by a torque motor. The subject's writing difficulty and tremor were temporarily abolished by partial motor point anaesthesia of pronator teres. We conclude that the tremor was caused by an abnormal response to muscle spindle input from pronator teres.
我们描述了一名患者，他在书写时抱怨右前臂抽搐。其手臂主动旋前会产生几次旋前/旋后震颤。通过轻敲手腕掌侧、手指伸肌和胸大肌的肌腱，以及通过扭矩电机强行旋腕，也能引发一阵震颤。通过对旋前圆肌进行部分运动点麻醉，该受试者的书写困难和震颤暂时消失。我们得出结论，震颤是由旋前圆肌对肌梭输入的异常反应引起的。
