VESTIBULAR NUCLEAR NEURON ACTIVITY DURING ACTIVE AND PASSIVE HEAD MOVEMENT IN THE ALERT RHESUS MONKEY

Authors
  1. Schwarz, D.W.F.
  2. Khalsa, S.B.S.
  3. Tomlinson, R.D.
  4. Landolt, J.
Corporate Authors
Toronto Univ, Toronto ONT (CAN) Dept of Otolaryngology;Toronto Univ, Toronto ONT (CAN) Dept of Physiology;Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The purpose of the study was to determine whether cells in the brain stem of the Rhesus monkey receiving horizontal semicircular-canal input differ in their response characteristics during active and passive head rotations. If motor programs for active head rotation can induce changes in the apparent firing characteristics via the efferent vestibular system, such changes should be apparent at the level of the second order neurons. Results appear to indicate that programs initiating active head rotations cannot change the signal derived from the semicircular canal. In view of the extensive collateralization of efferent axons within a given semicircular-canal end organ with axons branching to vestibular organs on both sides, it seems unlikely that different vestibular afferents are influenced by specific motor programs.
Report Number
DCIEM86-P-50 — Contract Report (Final)
Date of publication
01 Jan 1985
Number of Pages
34
DSTKIM No
86-02373
CANDIS No
97086
Format(s):
Hardcopy;Originator's fiche received by DSIS

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