痉挛患者单个运动单位的力量和放电模式调节受损。
Impaired regulation of force and firing pattern of single motor units in patients with spasticity.
作者信息
Rosenfalck A, Andreassen S
出版信息
J Neurol Neurosurg Psychiatry. 1980 Oct;43(10):907-16. doi: 10.1136/jnnp.43.10.907.
Abstract
Patients with spasticity were unable to maintain a constant force of the anterior tibial muscle. The force at maximal effort was reduced to less than 40% of normal, partly because motor units fired at a reduced rate even at high levels of contraction. Force and instantaneous frequency fluctuated slowly. The fast regulation of the firing rate, which characterises normal muscle, was absent. The variation between successive intervals was less than normal and the serial correlation coefficient between intervals increased.
摘要
患有痉挛的患者无法维持胫前肌的恒定力量。最大用力时的力量降至正常水平的40%以下，部分原因是即使在高收缩水平下运动单位的放电频率也降低了。力量和瞬时频率缓慢波动。正常肌肉所特有的放电频率的快速调节不存在。连续间隔之间的变化小于正常情况，间隔之间的序列相关系数增加。
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