CONTROL OF CALORIC NYSTAGMUS BY MANIPULATING AROUSAL AND VISUAL FIXATION DISTANCE
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 16, 1961
- Accession Number
- AD0263256
Entities
People
- F.e.jr Guedry
- J.b. Posner
- W.e. Collins
Organizations
- United States Army Medical Research Laboratory