Document Detail

Ocular counterrolling as an indicator of vestibular otolith function.
MedLine Citation:
PMID:  6605496     Owner:  NLM     Status:  MEDLINE    
Sixteen normal subjects, 8 patients with unilateral vestibular nerve section, and 11 patients with acoustic neuromas underwent dynamic ocular counterrolling (OCR) testing. Both eyes were photographed at every 10 degrees as the subject was tilted about the naso-occipital axis at a constant velocity of 3 degrees/sec. Normal subjects differed from patients in four characteristics: (1) The binocular OCR patterns of normal subjects were consistent from one trial to the next. (2) The two eyes were mostly conjugate in movement. (3) The patterns were smooth. (4) OCR was approximately symmetric to right and left tilts. In the patients, patterns were abnormal when tilted to the side opposite the lesion. In quantified measures of the four characteristics, differences between the normal group and the group of patients with unilateral vestibular nerve sections were significant in consistency and total scores. In the patients with acoustic neuromas, OCR abnormalities corresponded to the size and location of the tumors and the extent to which they impinged on the utricular nerve and brainstem.
S G Diamond; C H Markham
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Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Neurology     Volume:  33     ISSN:  0028-3878     ISO Abbreviation:  Neurology     Publication Date:  1983 Nov 
Date Detail:
Created Date:  1983-12-17     Completed Date:  1983-12-17     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0401060     Medline TA:  Neurology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1460-9     Citation Subset:  AIM; IM; S    
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MeSH Terms
Eye Movements*
Middle Aged
Neuroma, Acoustic / physiopathology*,  surgery
Vestibule, Labyrinth / innervation,  physiology*

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