Document Detail

Innervation of the trapezius muscle: is cervical contribution important to its function?
MedLine Citation:
PMID:  17071308     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To study the effect of the cervical plexus and the accessory nerve to the function of the trapezius muscle. STUDY DESIGN AND SETTING: Eighteen adult male Sprague-Dawley rats were randomly divided into three groups. The neurotomies were performed in the left sides and the right sides served as within-subject controls. In group A, the accessory nerve was transected. The C2-5 were transected in group B, and both of the accessory nerve and C2-5 were cut in group C. The electrophysiologic, myophysiologic, and histologic changes of the muscles were measured. RESULTS: There were significant differences (P < 0.05) between the three groups in the recovery rates of the transverse area of the muscles. The CMAP recorded from the experimental sides in group B were similar to the control sides. The values of the maximum tension of the tetanus contraction between the two sides showed no differences either (P > 0.05). CONCLUSION: The accessory nerve supplies the most important motor input to the trapezius. Motor innervations of the cervical plexus are not very significant.
Wen Zhao; Jian Sun; Jia-Wei Zheng; Jun Li; Yue He; Zhi-Yuan Zhang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery     Volume:  135     ISSN:  0194-5998     ISO Abbreviation:  Otolaryngol Head Neck Surg     Publication Date:  2006 Nov 
Date Detail:
Created Date:  2006-10-30     Completed Date:  2006-12-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508176     Medline TA:  Otolaryngol Head Neck Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  758-64     Citation Subset:  IM    
Department of Oral and Maxillofacial Surgery, The Ninth People's Hospital of Shanghai, School of Stomatology, Shanghai Jiaotong University, Shanghai, PR, China.
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MeSH Terms
Accessory Nerve / physiology
Cervical Plexus / physiology*
Muscle Contraction / physiology
Muscle, Skeletal / innervation*
Random Allocation
Rats, Sprague-Dawley
Shoulder / innervation*

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