Price R, Lehmann J F
Department of Rehabilitation Medicine, University of Washington, Seattle 98195.
Arch Phys Med Rehabil. 1990 Sep;71(10):745-8.
The changes in passive mechanical muscle properties due to cooling of the calf in healthy human volunteers were investigated. The technique, using sinusoidal driving of the foot, permitted the separation of muscle stiffness response into its elastic and viscous components. Cooling the calf with ice for 30 minutes increases the rate of change of elastic stiffness with frequency, and it increases the frictional stiffness over a frequency range of 3 to 12Hz. Such cooling would produce an estimated 3% to 10% increase in total stiffness, on average, in a spastic person. This increase in stiffness would counteract reductions in total stiffness achieved during the application of cryotherapy to relieve spasticity. However, one could expect that for a clinically significant reduction of spasticity, the increase in passive stiffness of the muscle generated by cooling would be largely overshadowed by the decrease in reflex reactivity.
研究了健康人类志愿者小腿冷却后被动肌肉力学特性的变化。该技术通过对足部进行正弦驱动，能够将肌肉僵硬度反应分离为弹性和粘性成分。用冰敷小腿30分钟会增加弹性僵硬度随频率的变化率，并在3至12赫兹的频率范围内增加摩擦僵硬度。平均而言，这种冷却会使痉挛患者的总僵硬度估计增加3%至10%。这种僵硬度的增加会抵消在应用冷冻疗法缓解痉挛过程中总僵硬度的降低。然而，可以预期，对于临床上显著减轻痉挛的情况，冷却产生的肌肉被动僵硬度增加在很大程度上会被反射反应性的降低所掩盖。
