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Extracellular recording of vestibulo-thalamic neurons projecting to the spinal cord in the cat

Authors
Journal
Neuroscience Letters
0304-3940
Publisher
Elsevier
Publication Date
Volume
104
Identifiers
DOI: 10.1016/0304-3940(89)90323-6
Keywords
  • Vestibular Neuron
  • Thalamus
  • Axonal Branching
  • Spinal Cord
  • Cat

Abstract

Abstract Forty vestibulo-thalamic (VT) neurons were recorded extracellularly in the vestibular nuclei of the anesthetized cat. More than half of the VT neurons responded monosynaptically to vestibular nerve stimulation; the others responded polysynaptically. The VT neurons were activated antidromically from one or two sites in the contralateral VPL, VPM, VL, VM, SG, and PO in the thalamus. Their axonal arborizations in the thalamus were likely restricted in narrow areas. About three quarters of the VT neurons were also activated antidromically from the ventral funiculus in the C 1 segment. Axonal branchings were found in the contralateral C 1 gray matter. The VT neurons were mainly localized in the descending vestibular nucleus.

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