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Vestibular inputs to brain stem neurons that participate in motor learning in the primate vestibuloocular reflex.

Publication ,  Journal Article
Broussard, DM; Lisberger, SG
Published in: J Neurophysiol
November 1992

1. Previous studies have described a subpopulation of interneurons in the vestibuloocular reflex (VOR) pathways that express large changes in their responses to head turns in conjunction with motor learning in the VOR. These neurons are called flocculus target neurons (FTNs) because they are inhibited at monosynaptic latencies by stimulation of the flocculus and ventral paraflocculus. 2. Electrical stimulation of the vestibular labyrinth revealed that FTNs receive excitatory monosynaptic inputs from the ipsilateral vestibular labyrinth and longer-latency, excitatory inputs from the contralateral labyrinth. 3. Our data show that commissural inhibition, which has been thought to be an important feature of vestibular processing, does not provide the dominant inputs from the contralateral labyrinth to FTNs. Instead, the inputs from both labyrinths are excitatory and may be functionally antagonistic. Changes in the balance of excitatory inputs from the two horizontal canals to FTNs could contribute to motor learning in the VOR.

Duke Scholars

Published In

J Neurophysiol

DOI

ISSN

0022-3077

Publication Date

November 1992

Volume

68

Issue

5

Start / End Page

1906 / 1909

Location

United States

Related Subject Headings

  • Vestibule, Labyrinth
  • Synapses
  • Stereotaxic Techniques
  • Reflex, Vestibulo-Ocular
  • Neurons
  • Neurology & Neurosurgery
  • Male
  • Macaca mulatta
  • Learning
  • Brain Stem
 

Citation

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Broussard, D. M., & Lisberger, S. G. (1992). Vestibular inputs to brain stem neurons that participate in motor learning in the primate vestibuloocular reflex. J Neurophysiol, 68(5), 1906–1909. https://doi.org/10.1152/jn.1992.68.5.1906
Broussard, D. M., and S. G. Lisberger. “Vestibular inputs to brain stem neurons that participate in motor learning in the primate vestibuloocular reflex.J Neurophysiol 68, no. 5 (November 1992): 1906–9. https://doi.org/10.1152/jn.1992.68.5.1906.
Broussard, D. M., and S. G. Lisberger. “Vestibular inputs to brain stem neurons that participate in motor learning in the primate vestibuloocular reflex.J Neurophysiol, vol. 68, no. 5, Nov. 1992, pp. 1906–09. Pubmed, doi:10.1152/jn.1992.68.5.1906.

Published In

J Neurophysiol

DOI

ISSN

0022-3077

Publication Date

November 1992

Volume

68

Issue

5

Start / End Page

1906 / 1909

Location

United States

Related Subject Headings

  • Vestibule, Labyrinth
  • Synapses
  • Stereotaxic Techniques
  • Reflex, Vestibulo-Ocular
  • Neurons
  • Neurology & Neurosurgery
  • Male
  • Macaca mulatta
  • Learning
  • Brain Stem