Document Detail

Sensing and controlling rotational orientation in normal subjects and patients with loss of labyrinthine function.
MedLine Citation:
PMID:  8238269     Owner:  NLM     Status:  MEDLINE    
The disability resulting from uni-or bilateral loss of vestibular function was assessed by exposing subjects, in darkness, to random rotational displacements on a motorized chair away from a "center" position and requiring them to rotate themselves back to center using a "joystick" control. Normal subjects were accurate within 10 to 15 percent over 180-degree rotations. Alabyrinthine subjects failed to sense their rotation to any useful extent. Subjects with unilateral loss of function as a result of surgery produced hypometric responses to ipsilateral rotation and large amplitude, but inaccurate responses to contralateral rotation. This pattern became more symmetric and normometric with adaptation to loss of function. The procedure promises to be a more useful measure of adaptation than assessing vestibulo-ocular reflexes.
G B Brookes; M A Gresty; T Nakamura; T Metcalfe
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The American journal of otology     Volume:  14     ISSN:  0192-9763     ISO Abbreviation:  Am J Otol     Publication Date:  1993 Jul 
Date Detail:
Created Date:  1993-12-22     Completed Date:  1993-12-22     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7909513     Medline TA:  Am J Otol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  349-51     Citation Subset:  IM; S    
Department of Neuro-otology, National Hospital for Neurology and Neurosurgery, London, England.
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MeSH Terms
Ear, Inner / physiopathology*
Middle Aged
Nystagmus, Pathologic / complications
Reflex, Vestibulo-Ocular*
Vestibular Diseases / complications,  diagnosis,  physiopathology*
Vestibular Function Tests
Vestibule, Labyrinth / physiology,  physiopathology*

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