Physiology and Pharmacology
Physiol Pharmacol
Medical Sciences
http://ppj.phypha.ir
32
journal32
24765236
24765244
10.61186/phypha
(previous ISSN: 17350581)
en
jalali
1386
9
1
gregorian
2007
12
1
11
3
online
1
fulltext
en
The effect of cutaneous mechanical stimulations of lateral plantar surface on the excitability of ipsilateral and contralateral motoneurons
Nervous system (others)
Others
Experimental research article
Experimental research article
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<0.05 p<0.05, respectively decreased). Furthermore, the latencies of H
reflexes were also increased (p<0.05).
Conclusion: Our results highlight the modulatory effects of natural stimulation of cutaneous afferents on excitability of
ipsilateral and contralateral motoneurones. This in respect may have practical application in the management of muscle
tone disorders following brain and spinal cord injuries.
H-reflex, Mechanical stimulation, Lateral plantar nerve, Motorneuron excitability, Human
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http://ppj.phypha.ir/browse.php?a_code=A-10-142-1&slc_lang=en&sid=1
Andisheh
Bastani
andisheh_bas@yahoo.com
320031947532846004077
320031947532846004077
No
mohammad reza
hadian
hadian_ras@yahoo.com
320031947532846004078
320031947532846004078
Yes
saeed
talebian
320031947532846004079
320031947532846004079
No
golamreza
olyaie
320031947532846004080
320031947532846004080
No
hossein
bagheri
320031947532846004081
320031947532846004081
No