RT - Journal Article T1 - The effect of cutaneous mechanical stimulations of lateral plantar surface on the excitability of ipsilateral and contralateral motoneurons JF - Physiol-Pharmacol YR - 2007 JO - Physiol-Pharmacol VO - 11 IS - 3 UR - http://ppj.phypha.ir/article-1-244-en.html SP - 218 EP - 227 K1 - H-reflex K1 - Mechanical stimulation K1 - Lateral plantar nerve K1 - Motorneuron excitability K1 - Human AB - Mechanoreceptors of foot sole likely contribute in the reflex regulations. Stimulation of these receptors in the lateral aspect of the foot is corresponded to the lateral plantar division of the tibial nerve. Therefore, it was hypothesized that repetitive low threshold afferents stimulation would have an inhibitory effect on the soleus H-reflexes. Methods: Sixteen normal subjects voluntarily participated in this study and were randomly allocated. Subjects were remained in prone position. The cutaneous mechanical pressure (CMP) equal to 50% of leg and foot weight was applied to the ipsilateral lateral plantar surface using a special instrument through a square plate (30x30 mm). H reflexes as indicator for excitability of motoneurones was bilaterally elicited before and after the application of the CMP and the Hreflex parameters were measured. Results: The amplitude of H reflex and H/M ratio showed significant differences before and after the ipsilateral CMP stimulation of the lateral side of the foot (p LA eng UL http://ppj.phypha.ir/article-1-244-en.html M3 ER -