Synaptic connections of a periodontal primary afferent neuron within the subnucleus oralis of the cat

Yong Chul Bae, Yoshitaka Nagase, Atsushi Yoshida, Yoshio Shigenaga, Tomosada Sugimoto

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The central axon of a primary afferent neuron that responded to light mechanical stimulation of the lower premolar teeth in a fast adapting fashion was intra-axonally injected with horseradish peroxidase in the cat. The labeled terminals within the rostrodorsomedial (Vo.r) and dorsomedial (Vo.dm) parts of subnucleus oralis were examined electron microscopically. The labeled ending had pale axoplasm, contained clear spherical synaptic vesicles, and formed multiple synapses with dendrites and/or unlabeled axonal endings with pleomorphic vesicles (P-endings). In these synaptic contacts, the labeled primary ending was presynaptic to dendrites and postsynaptic to P-endings. Labeled endings simultaneously synapsing with both dendrites and P-endings were more frequent in Vo.dm (28%) than in Vo.r (8.3%).

Original languageEnglish
Pages (from-to)175-179
Number of pages5
JournalBrain Research
Volume606
Issue number1
DOIs
Publication statusPublished - Mar 19 1993

Keywords

  • Primary neuron
  • Spinal trigeminal nucleus
  • Subnucleus oralis
  • Trigeminal nerve
  • Ultrastructure

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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