Accession Number:

AD0263256

Title:

CONTROL OF CALORIC NYSTAGMUS BY MANIPULATING AROUSAL AND VISUAL FIXATION DISTANCE

Descriptive Note:

Corporate Author:

ARMY MEDICAL RESEARCH LAB FORT KNOX KY

Report Date:

1961-08-16

Pagination or Media Count:

25.0

Abstract:

Groups of naive and experienced subjects were given a series of aural irrigations under various conditions. Variables manipulated included instructions designed to alert or relax the subjects, fixation distance, and illumination vs. total darkness. The alert condition produced nystagmus of greater amplitude and longer duration and yielded a smoother graphed function than the reverie condition. Near fixation 30.5 cm yielded greater response than ceiling fixation, and two subjects showed no observable reaction to the latter condition. These findings are of importance in clinical situations and in theoretical formulations of vestibular functioning. Instructions which influence arousal and visual fixation distance should not be matters of inadvertent variation in clinical examination procedures. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE