Document Detail

Upper trapezius electromyography aids in the early diagnosis of bulbar involvement in amyotrophic lateral sclerosis.
MedLine Citation:
PMID:  21554033     Owner:  NLM     Status:  Publisher    
Abstract Electromyography (EMG), particularly measurements of the tongue or sternocleidomastoid, aids in the diagnosis of amyotrophic lateral sclerosis (ALS) and may be used to identify lower motor neuron lesions in the bulbar region. Abnormal trapezius EMG recordings were recently shown to be useful in diagnosing ALS. Here, we investigated the role of upper trapezius EMG in assessing bulbar involvement in ALS. Standard EMG measurements were recorded from the upper trapezius in ALS, cervical spondylotic myelopathy (CSM), and normal controls (NC). Forty-three CSM patients were examined pre-operatively and three months post-operatively. Greater spontaneous activity levels were observed in upper trapezius EMG measurements of ALS patients with a disease duration of ≤8 months (70%), compared with patients with a disease duration of >8 months (40%). Significant differences in motor unit action potential parameters were also noted between ALS and CSM or NC. Fewer spontaneous EMG recordings were detected in CSM post-operatively. Furthermore, no differences in neurogenic EMG measurements were observed in ALS between the trapezius and sternocleidomastoid muscles (p = 0.22). In conclusion, upper trapezius EMG recordings may provide valuable information for assessing the clinical and subclinical involvement of bulbar lower motor neurons in ALS patients, particularly at early disease stages.
Ying-Sheng Xu; Ju-Yang Zheng; Shuo Zhang; Dong-Sheng Fan
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-5-9
Journal Detail:
Title:  Amyotrophic lateral sclerosis : official publication of the World Federation of Neurology Research Group on Motor Neuron Diseases     Volume:  -     ISSN:  1471-180X     ISO Abbreviation:  -     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-5-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101283386     Medline TA:  Amyotroph Lateral Scler     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Neurology, Peking University Third Hospital, Haidian District, Beijing, China.
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