[abstract] A COMPARISON OF CALORIC INDUCED NYSTAGMUS IN THE RHESUS MONKEY AT THREE PRESSURE LEVELS.

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[abstract] A COMPARISON OF CALORIC INDUCED NYSTAGMUS IN THE RHESUS MONKEY AT THREE PRESSURE LEVELS.

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Title: [abstract] A COMPARISON OF CALORIC INDUCED NYSTAGMUS IN THE RHESUS MONKEY AT THREE PRESSURE LEVELS.
Author: Correia, MC; Winkleman, PE; Wells, CH
Abstract: Cold water (27.5'C) caloric irrigations were presented in a counter balanced paradigm to the right and left ears of four Rhesus monkeys (Macaca Mulatta) under pressures of zero, 13.4 and 26.8 PSIG. Horizontal eye movements were monitored, using electronystagmographic techniques, during caloric irrigations as well as during transition, at a rate of 4.5 PSIG/min., responses showed no systematic differences between the parameters of slow phase eye velocity, frequency of beats, duration of the response and cuplogram slope at the different pressure levels. This finding suggests that the biodynamics of the cupulaendolymph system of the horizontal semicircular canals are not modified by pressures up to 26.8 PSIG. However, a spontaneous nystagmus was observed in 25% of the dives during change in pressure. This nystagmus commenced on the average at 6.7 PSIG during return to zero PSIG. The direction and time course of the nystagmic response suggests it originated from caloric stimulation of the labyrinth by cooling of residual water in the external auditory canal.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held May 10-11, 1974. Hilton Hotel, Washington, D.C. (http:www.uhms.org)
URI: http://archive.rubicon-foundation.org/62
Date: 1974

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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