Document Detail

Human ocular torsion and perceived roll responses to linear acceleration.
MedLine Citation:
PMID:  16286699     Owner:  NLM     Status:  MEDLINE    
We investigated if human ocular torsion (OT) and perceived roll (PR) are elicited in response to either dynamic interaural linear acceleration or dynamic roll tilt of the gravito-inertial force (GIF). We expanded a previous study [26] that measured only OT across a limited frequency-range (from 0.35 Hz to 1 Hz) by simultaneously measuring OT and PR at three very low (0.01, 0.02 and 0.05 Hz) and one high (1 Hz) frequencies. Three experimental conditions were investigated: (1) Y-Upright with acceleration along the interaural (Y) axis while upright, (2) Y-Supine with acceleration along the Y-axis while supine, and (3) Z-RED with acceleration along the rostro-caudal Z) axis with right-ear-down (RED). OT was measured by video-oculography, while PR was measured by use of a somatosensory bar. OT and PR were qualitatively different. Large OT responses were measured for Y-Upright and Y-Supine, while large perceived roll responses were observed for Y-Upright and Z-RED. OT for Z-RED was small, and PR for Y-Supine was absent. In conclusion, OT and PR appear governed by qualitatively different neural mechanisms. OT appears mostly influenced by central low-pass filtering of interaural graviceptor cues, while PR appears mostly influenced by roll tilt of the GIF.
Lionel H Zupan; Daniel M Merfeld
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of vestibular research : equilibrium & orientation     Volume:  15     ISSN:  0957-4271     ISO Abbreviation:  J Vestib Res     Publication Date:  2005  
Date Detail:
Created Date:  2005-11-15     Completed Date:  2006-01-10     Revised Date:  2014-09-13    
Medline Journal Info:
Nlm Unique ID:  9104163     Medline TA:  J Vestib Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  173-83     Citation Subset:  IM; S    
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MeSH Terms
Eye Diseases / physiopathology*
Gravity Sensing / physiology*
Orientation / physiology
Otolithic Membrane / physiology
Reflex, Vestibulo-Ocular / physiology*
Supine Position
Torsion Abnormality
Grant Support

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