Document Detail

Head and body center of gravity control strategies: adaptations following vestibular rehabilitation.
MedLine Citation:
PMID:  12625570     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: We present for the first time evidence that vestibulopathy impairs coordination of the head with the body center of gravity (CG) during free speed gait over ground. Vestibulopathic individuals demonstrate uncoordinated movement and gait due, at least in part, to impaired head stability and visual fixation. Vestibular rehabilitation increases speed and stability during gait and stair climbing, although the underlying mechanisms are poorly understood. MATERIAL AND METHODS: To determine whether these locomotor improvements are due to reorganized coordination of the head with whole body CG, three-dimensional kinematics were obtained from 10 vestibulopathic individuals before and after vestibular rehabilitation and from 10 matched healthy control subjects during unconstrained, paced and in-place gait. Head control patterns were characterized using both qualitative pattern analysis and quantification of coherence between head and body CG displacements. RESULTS: Patterns of head-CG coordination differ between normal and vestibulopathic individuals in all three directions of head rotation--pitch, roll and yaw--before rehabilitation. Following vestibular rehabilitation, subjects with vestibulopathy demonstrate more normal patterns in pitch and improvements toward normal in roll and yaw. CONCLUSION: These data strongly suggest that compensatory mechanisms, obtained during vestibular rehabilitation, mediate head-CG coordination.
Carolynn Patten; Fay B Horak; David E Krebs
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Acta oto-laryngologica     Volume:  123     ISSN:  0001-6489     ISO Abbreviation:  Acta Otolaryngol.     Publication Date:  2003 Jan 
Date Detail:
Created Date:  2003-03-10     Completed Date:  2003-08-13     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370354     Medline TA:  Acta Otolaryngol     Country:  Norway    
Other Details:
Languages:  eng     Pagination:  32-40     Citation Subset:  IM; S    
Biomotion Laboratory, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02129, USA.
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MeSH Terms
Adaptation, Physiological / physiology
Aged, 80 and over
Fixation, Ocular / physiology
Gait / physiology*
Head Movements / physiology*
Image Processing, Computer-Assisted
Kinesthesis / physiology
Locomotion / physiology*
Mathematical Computing
Middle Aged
Orientation / physiology
Postural Balance / physiology*
Reflex, Vestibulo-Ocular / physiology
Vestibular Diseases / physiopathology,  rehabilitation*
Vestibular Function Tests
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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