Factors affecting cutaneous mechanoreceptor response. I. Constant-force versus constant-displacement stimulation.
Factors affecting cutaneous mechanoreceptor response. I. Constant-force versus constant-displacement stimulation.
复制标题
影响皮肤机械感受器反应的因素。
DOI：
10.1152/jn.1982.47.3.515
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发表时间：
1982
影响因子：
2.5
通讯作者：
PubolsJr,BH
中科院分区：
文献类型：
--
作者：
PubolsJr,BH
4.提供刺激斜坡是足够高的速度，适应I型无毛皮肤机械感受器是更迅速的恒定位移比恒定力的刺激。然而，以下较低的斜坡速度，速率的适应恒定的力量和恒定的位移刺激可能是可比的。5. I型机械感受器对恒定位移的适应并不“平行”应力松弛。即使在反作用力已经变得相对稳定之后，在中等缓慢适应的单位中，放电速率在10- 15 s内下降到零，并且在非常缓慢适应的单位中，放电速率继续下降许多秒或分钟。6.对于这两类I型机械感受器，对数函数最恰当地描述了机械刺激力和初级传入放电率之间的关系。7.结果与以前的研究结果进行比较，在非皮肤缓慢适应mechanoreceptor和皮肤的mechanoreceptor活性的粘弹性的贡献方面进行了讨论。可以得出结论，皮肤表面的机械事件有助于，但不单独占，皮肤机械感受器的放电特性。
4. Provided stimulus ramps are of sufficiently high velocity, adaptation of type I glabrous skin mechanoreceptors is more rapid with constant-displacement than with constant-force stimuli. However, following lower ramp velocities, rates of adaptation to constant-force and constant-displacement stimuli may be comparable. 5. Adaptation of type I mechanoreceptors to constant displacements does not “parallel” stress relaxation. Even after reactive force has become relatively stable, discharge rate drops to zero within 10-l 5 s in moderately slowly adapting units and continues to decline for many seconds or minutes in very slowly adapting units. 6. For both categories of type I mechanoreceptor, a logarithmic function most appropriately describes the relationship between mechanical stimulus force and primary afferent discharge rate. 7. Results are compared with previous findings in noncutaneous slowly adapting mechanoreceptors and are discussed in terms of the contributions of viscoelastic properties of skin to cutaneous mechanoreceptor activity. It is concluded that mechanical events at the skin surface contribute to, but do not alone account for, the discharge properties of cutaneous mechanoreceptors.