Horizontal canal input to cat extraocular motoneurons

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

doi:10.1016/0006-8993(79)90774-1

Horizontal canal input to cat extraocular motoneurons

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 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 language	English
Pages (from-to)	231-240
Number of pages	10
Journal	Brain Research
Volume	177
Issue number	2
DOIs	https://doi.org/10.1016/0006-8993(79)90774-1
Publication status	Published - 1979 Nov 16
Externally published	Yes

ASJC Scopus subject areas

Developmental Biology
Molecular Biology
Clinical Neurology
Neuroscience(all)

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10.1016/0006-8993(79)90774-1

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title = "Horizontal canal input to cat extraocular motoneurons",

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.",

author = "Y. Uchino and S. Suzuki and T. Miyazawa and S. Watanabe",

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T1 - Horizontal canal input to cat extraocular motoneurons

AU - Uchino, Y.

AU - Suzuki, S.

AU - Miyazawa, T.

AU - Watanabe, S.

PY - 1979/11/16

Y1 - 1979/11/16

N2 - 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.

AB - 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.

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JO - Brain Research

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Horizontal canal input to cat extraocular motoneurons

Abstract

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