Article

Synaptic actions of cutaneous Aδ fibers on primate motoneurons

Marine Biomedical Institute, Departments of Physiology and Biophysics and Anatomy, University of Texas Medical Branch, Galveston, TX 77550-2772U.S.A.
Brain Research DOI:10.1016/0006-8993(84)90808-4 pp.195-199

ABSTRACT Postsynaptic potentials were recorded from flexor and extensor motoneurons in the lumbosacral enlargement of α-chloralose- and sodium pentobarbital-anesthetized monkeys spinalized at a lower thoracic level, in response to volleys in Aδ fibers in a cutaneous peripheral nerve (sural nerve). These potentials could be recorded and analyzed in most primate motoneurons with greater ease than in the cat. They correlated well with the third negative wave of the cord dorsum potential (N3 wave) which is also characteristically more distinct in the monkey than in the cat.

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Keywords

analyzed
 
cord dorsum potential
 
cutaneous peripheral nerve
 
extensor motoneurons
 
greater
 
lower thoracic level
 
lumbosacral enlargement
 
Postsynaptic potentials
 
sodium pentobarbital-anesthetized monkeys spinalized
 
α-chloralose-
 

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