Document Detail

The vestibulospinal reflex in humans: effects on paraspinal muscle activity.
MedLine Citation:
PMID:  14575397     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To elucidate the electromyographic (EMG) patterns elicited in the superficial paraspinal muscles (sacrospinalis, ileocostalis lomborum, longissimus dorsi and splenium cervicis). MATERIAL AND METHODS: In normal subjects adapted to the dark and standing on a force platform, EMG patterns were elicited in the superficial paraspinal muscles by means of unilateral cold caloric stimulation of the labyrinth. RESULTS: Almost concomitantly with the occurrence of postural derangement of the subject's trunk and head, the EMG patterns of the paraspinal muscles on both sides showed significant and consistent changes. In particular, the paraspinal muscles ipsilateral to the stimulated side showed a significant reduction in activity, while the homologous muscles of the contralateral side markedly increased their activity, with a consistent delay in comparison to the contralateral muscles. Moreover, the EMG changes occurred in a hierarchic fashion in the caudal-rostral direction. In fact, the more powerful and longer-lasting effects were consistently observed in the more caudal muscles, i.e. the sacrospinalis and ileocostalis, while the effects on the longissimus dorsi and splenium cervicis muscles were weak and inconsistent. CONCLUSION: These results suggest a possible use for the EMG patterns resulting from unilateral cold caloric stimulation for clinical evaluation of the vestibulospinal reflex.
Marcello A Caria; Claudio Tavera; Francesco Melis; Ombretta Mameli
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta oto-laryngologica     Volume:  123     ISSN:  0001-6489     ISO Abbreviation:  Acta Otolaryngol.     Publication Date:  2003 Sep 
Date Detail:
Created Date:  2003-10-24     Completed Date:  2004-02-11     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370354     Medline TA:  Acta Otolaryngol     Country:  Norway    
Other Details:
Languages:  eng     Pagination:  817-25     Citation Subset:  IM    
Department of Biomedical Sciences, Human Physiology Division, Faculty of Medicine, Sassari University, Sassari, Italy.
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MeSH Terms
Caloric Tests / methods
Cold Temperature
Muscle, Skeletal / physiology*
Posture / physiology
Reflex / physiology*
Spine / physiology*
Vestibule, Labyrinth / physiology*

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