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SHORT COMMUNICATION: LONG‐LASTING DEPOLARIZATION OF THE CENTRAL TERMINALS OF CUTANEOUS AFFERENTS IN L7 SEGMENT EVOKED BY VOLLEYS ASCENDING FROM THE SACRAL CORD IN THE CAT
Author(s) -
Lupa K.,
Wójcik G.,
Tarnecki R.,
Niechaj A.
Publication year - 1988
Publication title -
clinical and experimental pharmacology and physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 103
eISSN - 1440-1681
pISSN - 0305-1870
DOI - 10.1111/j.1440-1681.1988.tb01020.x
Subject(s) - depolarization , spinal cord , afferent , cats , anatomy , neuroscience , inhibitory postsynaptic potential , medicine , biology
SUMMARY 1. In 72% of non‐anaesthetized spinal cats, single volleys ascending from the sacral cord evoke long‐lasting primary afferent depolarization in L7 segment. It occurs in the central terminals of cutaneous but not in Ia muscle afferents. 2. Volleys descending to L7 segment evoke only short‐lasting presynaptic depolarization. 3. It is concluded that presynaptic inhibition in L7 segment produced by ascending volleys is more effective than that evoked by descending volleys.