SOME OBSERVATIONS ON CULMINATION AND DIRECTIONAL PREPONDERANCE OF THE POSTSTIMULATORY NYSTAGMUS

1962 ◽  
Vol 72 (1) ◽  
pp. 79???103 ◽  
Author(s):  
NICHOLAS TOROK
Keyword(s):  
Directional Preponderance

Directional preponderance in visual motion perception

1989 ◽  
Vol 7 (2-4) ◽  
pp. 309-310
Author(s):  
S. Mateeff ◽  
J. Hohnsbein ◽  
W.H. Ehrenstein ◽  
Z. Bohdanecký ◽  
T. Radil
Keyword(s):  
Motion Perception ◽  
Visual Motion ◽  
Visual Motion Perception ◽  
Directional Preponderance

Reference Values for Serial Vestibular Testing

1986 ◽  
Vol 95 (1) ◽  
pp. 83-90 ◽  
Author(s):  
Leonard Proctor ◽  
Robert Glackin ◽  
Craig Smith ◽  
Hiroshi Shimizu ◽  
Paul Lietman
Keyword(s):  
Reference Values ◽  
Test Scores ◽  
Vestibular Function ◽  
Normal Subjects ◽  
Caloric Test ◽  
Initial Value ◽  
Short Acting ◽  
Normal Limits ◽  
Vestibular Testing ◽  
Directional Preponderance

This study defines the normal limits of day-to-day variation in vestibular function. A short-acting caloric test was used and nystagmus intensity was measured by means of an interactive computerized technique. Data were analyzed from 30 normal subjects tested on three successive days and from ten of these subjects who were also tested on 11 additional occasions. Individual caloric test scores generally remained between 55% and 170% of their initial value; narrower ranges resulted when scores were averaged together. There was very little habituation of caloric responses. The upper normal limits of test-retest variation in scores for right-left difference and directional preponderance of caloric responses were 24% and 22%, respectively.

Multivariate vestibular testing: Laterality of unilateral Ménière's disease

2002 ◽  
Vol 11 (6) ◽  
pp. 405-412
Author(s):  
P.S. Dimitri ◽  
C. Wall ◽  
S.D. Rauch
Keyword(s):  
Discrimination Performance ◽  
Meniere’S Disease ◽  
Menière’S Disease ◽  
Meniere's Disease ◽  
Ménière’S Disease ◽  
Positional Nystagmus ◽  
Menière's Disease ◽  
Vestibular Testing ◽  
Ménière's Disease ◽  
Directional Preponderance

This paper discusses the use of vestibular testing to discriminate between right (n = 29) and left (n = 27) Ménière's disease. We examined reduced vestibular response (RVR), directional preponderance, and spontaneous and positional nystagmus measurements from electronystagmography, as well as the asymmetry measurements from the sinusoidal harmonic acceleration test, to determine whether multivariate logistic regression could improve upon the discrimination performance of RVR alone. We found that patients with a spontaneous or positional nystagmus often had a “recovery nystagmus”, beating in the opposite direction of that predicted for an acute lesion. When present, the direction and magnitude of such nystagmus could be used in the classification algorithm to increase the discriminatory power over RVR alone, but in these patients the rotation test asymmetry measurements were rendered useless. In the absence of spontaneous or positional nystagmus, asymmetry measurements significantly enhanced right/left discrimination. Directional preponderance was insignificant in determining the side of lesion.

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