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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)
DOI: https://doi.org/10.15407/fz

Fiziologichnyi Zhurnal

is a scientific journal issued by the

Bogomoletz Institute of Physiology
National Academy of Sciences of Ukraine

Editor-in-chief: V.F. Sagach

The journal was founded in 1955 as
1955 – 1977 "Fiziolohichnyi zhurnal" (ISSN 0015 – 3311)
1978 – 1993 "Fiziologicheskii zhurnal" (ISSN 0201 – 8489)
1994 – 2016 "Fiziolohichnyi zhurnal" (ISSN 0201 – 8489)
2017 – "Fiziolohichnyi zhurnal" (ISSN 2522-9028)

Fiziol. Zh. 2007; 53(1): 41-47


Effects of experimental muscle painon short and long-latency compo-nents of stretch-reflex in elbowmuscles of unanaesthetized cat

D.V. Lizun, G. V. Dovgalets,A. M. Talnov, A.I. Kostyukov.

    O.O. Bogomolets Physiology Institute of National Academyof Sciences of Ukraine, Kyiv


Abstract

Electromyographic (EMG) activity of the elbow joint muscles induced during passive extension of the joint was recorded from the unaesthetized cat before and after injection of 5% NaCl solution which has been used as an activator of nocicep- tors. It was shown that the amplitude of the long-latency M2 component of flexor stretch-reflex was significantly increased after injection of saline while the amplitude change of shot- latency M1 component was insignificant. The latency of EMG in flexor significantly decreased. The changes of extensor EMG response parameters were similar but less expressed. Dura- tion of such effect could achieve 20 minutes, after that all response parameters of stretch-reflex returned to the standard values.

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