Horizontal canal input to cat extraocular motoneurons

Y. Uchino, S. Suzuki, T. Miyazawa, S. Watanabe

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Synaptic potential were recorded in identified extraocular motoneurons in the anesthetized cat, following stimulation of the horizontal canal nerve (HCN). Weak stimulation of the HCN evoked disynaptic EPSPs in ipsilateral medial rectus (i-MR), contralateral lateral rectus (c-LR) and disynaptic IPSPs in i-LR motoneurons. Weak stimulation of the HCN produced longer latency IPSPs (probably trisynaptic) in c-MR motoneurons. It is suggested that the HCN projects to an excitatory interneuron in the vestibular nucleus whose axon in turn projects to a third order inhibitory interneuron in the IIIrd nucleus which finally projects to c-MR motoneurons. Essentially there is no influence of the HCN stimulation on bilateral superior rectus (SR), inferior rectus (IR), superior oblique (SO) and inferior oblique (IO) motoneurons.

Original languageEnglish
Pages (from-to)231-240
Number of pages10
JournalBrain Research
Volume177
Issue number2
DOIs
Publication statusPublished - 1979 Nov 16
Externally publishedYes

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Horizontal canal input to cat extraocular motoneurons'. Together they form a unique fingerprint.

  • Cite this

    Uchino, Y., Suzuki, S., Miyazawa, T., & Watanabe, S. (1979). Horizontal canal input to cat extraocular motoneurons. Brain Research, 177(2), 231-240. https://doi.org/10.1016/0006-8993(79)90774-1