MODULATION OF THE SOLEUS H-REFLEX FOLLOWING GALVANIC VESTIBULAR STIMULATION AND CUTANEOUS STIMULATION IN PRONE HUMAN SUBJECTS
MODULATION OF THE SOLEUS H-REFLEX FOLLOWING GALVANIC VESTIBULAR STIMULATION AND CUTANEOUS STIMULATION IN PRONE HUMAN SUBJECTS
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DOI：
10.1002/mus.21275
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发表时间：
2009-08-01
期刊：
影响因子：
3.4
通讯作者：
Bent, Leah R.
中科院分区：
文献类型：
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作者：
Lowrey, Catherine R.;Bent, Leah R.
有证据表明，前庭和躯体感觉输入可能会相互作用时，他们被中枢神经系统处理，虽然这种相互作用的个人感觉的贡献的性质是未知的。我们研究了前庭和皮肤条件刺激对运动神经元池的影响，运动神经元池通过霍夫曼反射（H反射）供应比目鱼肌。我们应用前庭电刺激（GVS;双极，双耳，500毫秒，2.5毫安方波脉冲）和皮肤刺激（足底内侧神经; 11毫秒，三脉冲串，200赫兹），以俯卧的人类受试者，并检查H反射的振幅的变化。GVS单独引起的便利化（约20%）的H-反射，而同侧皮肤刺激单独引起26%的抑制。成对的GVS和皮肤刺激导致的线性总和的个人条件反射的影响。在GVS和皮肤刺激配对条件反射后观察到的H反射幅度可以从个体条件反射观察到的幅度预测。这些结果表明，在俯卧位，当肌肉不姿势从事，前庭和体感信息似乎总和以线性方式影响下肢运动神经元的反射反应。肌肉神经40：213-220，2009
There is evidence to suggest that vestibular and somatosensory inputs may interact when they are processed by the central nervous system, although the nature of the individual sensory contributions to this interaction is unknown. We examined the effects of a combined vestibular and cutaneous conditioning stimulus on the motoneuron pool that supplies the soleus muscle via the Hoffman reflex (H-reflex). We applied galvanic vestibular stimulation (GVS; bipolar, binaural, 500 ms, 2.5-mA square-wave pulse) and cutaneous stimulation (medial plantar nerve; 11 ms, three-pulse train, 200 Hz) to prone human subjects and examined changes in the amplitude of the H-reflex. GVS alone caused facilitation (approximately 20%) of the H-reflex, whereas ipsilateral cutaneous stimulation alone caused a 26% inhibition. Paired GVS and cutaneous stimulation resulted in a linear summation of the individual conditioning effects. H-reflex amplitudes observed after paired conditioning with GVS and cutaneous stimulation could be predicted from the amplitudes observed with individual conditioning. These results suggest that in the prone position, when the muscles are not posturally engaged, vestibular and somatosensory information appear to sum in a linear fashion to influence the reflex response of lower limb motoneurons. Muscle Nerve 40: 213-220, 2009