NITROGEN NARCOSIS AND ETHYL ALCOHOL INCREASE THE GAIN OF THE VESTIBULAR OCULAR REFLEX

Authors
  1. Hamilton, K.
  2. Fowler, B.
  3. Landolt, J.
  4. Porlier, G.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);York Univ, Toronto ONT (CAN)
Abstract
The effects of air, helium-oxygen (6.4 ATA), and ethyl alcohol (40% by volume at a dose of 1.5 ml/kg body weight) were examined on the gain, number of beats, and phase lag of the vestibular ocular reflex (VOR) by means of electronystagmography (n = 7). It was found that hyperbaric air and alcohol, both alone and in combination, produced approximately the same increase in the velocity of the slow phase component of the nystagmus, thereby elevating the gain of the system to unity. Hyperbaric helium-oxygen did not influence the gain. These findings suggest that nitrogen narcosis differentially impairs the system controlling the VOR. It is proposed that this impairment may help to explain the disorientation simetimes associated with nitrogen narcosis.
Report Number
DCIEM-89-P-05 — Research Paper; Reprint
Date of publication
01 Jan 1989
Number of Pages
9
Reprinted from
Undersea Biomedical Research, vol 16, no 2, 1989, p 129-137
DSTKIM No
89-03139
CANDIS No
61040
Format(s):
Hardcopy;Originator's fiche received by DSIS

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