Differential effects of plantar cutaneous afferent excitation on soleus stretch and H‐reflex
Differential effects of plantar cutaneous afferent excitation on soleus stretch and H‐reflex
复制标题
足底皮肤传入兴奋对比目鱼肌拉伸和 H 反射的不同影响
DOI：
10.1002/mus.21254
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发表时间：
2009
期刊：
影响因子：
3.4
通讯作者：
K. Nakazawa
中科院分区：
文献类型：
--
作者：
D. Sayenko;A. Vette;H. Obata;M. Alekhina;M. Akai;K. Nakazawa
以往的研究表明，足底皮肤传入可以调节运动神经元的兴奋性，这可能对人体姿势和运动的控制有重要作用。然而，足底皮肤传入在调节伸展和H反射的兴奋性方面的作用仍不清楚。在本研究中，假设电刺激脚底后可能伴随着脊髓兴奋性的调节，这取决于：(1)刺激位置和(2)所研究的反射。在这些实验中，16名健康受试者在坐姿下被诱发了条件性和非条件性伸展和H反射。在四个不同的条件性测试(CT)时间间隔，在足跟和跖骨两个不同部位，通过非伤害性电刺激足底皮肤传入，对两种反射进行条件化处理。对足跟的条件性刺激对所有CT间期的比目鱼肌牵拉反射都有显著的促进作用，而比目鱼肌H反射仅在50ms的CT间期有显著的促进作用，而在较长的CT间期有显著的抑制作用。然而，提供给跖骨区域的刺激主要导致伸展和H反射尺寸减小。这项研究扩展了已报道的关于脚底皮肤传入在脊髓神经元间反射回路中的作用的报道，因为它们的位置和所研究的反射是功能的。肌肉神经，2008
Previous studies have demonstrated that plantar cutaneous afferents can adjust motoneuron excitability, which may contribute significantly to the control of human posture and locomotion. However, the role of plantar cutaneous afferents in modulating the excitability of stretch and H‐reflex with respect to the location of their excitation remains unclear. In the present study, it was hypothesized that electrical stimulation delivered to the sole of the foot might be followed by modulation of spinal excitability that depends on: (1) the stimulation location and (2) the reflex studied. In these experiments, conditioned and unconditioned stretch and H‐reflexes were evoked in 16 healthy subjects in a seated position. Both reflexes were conditioned by non‐noxious electrical plantar cutaneous afferent stimulation at two different sites, the heel and metatarsal regions, at four different conditioning–test (CT) intervals. The conditioning stimulation delivered to the heel caused a significant facilitation of the soleus stretch reflex for all CT intervals, whereas the soleus H‐reflex had significant facilitation only at CT interval of 50 ms and significant inhibition at longer CT intervals. Stimulation delivered to the metatarsal region, however, resulted mainly in reduced stretch and H‐reflex sizes. This study extends the reported findings on the contribution of plantar cutaneous afferents within spinal interneuron reflex circuits as a function of their location and the reflex studied. Muscle Nerve, 2008
足底皮肤传入的电刺激可以促进比目鱼肌牵张反射吗？
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Sayenko D. G.;Vette A. H.;Kamibayashi K.;Nakajima T.;Akai M.;Nakazawa K.
通讯作者：
Nakazawa K.