| Noninvasive analysis of human neck muscle function. | |
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MedLine Citation:
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PMID: 8610245 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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STUDY DESIGN: Muscle use evoked by exercise was determined by quantifying shifts in signal relaxation times of T2-weighted magnetic resonance images. Images were collected at rest and after exercise at each of two intensities (moderate and intense) for each of four head movements: 1) extension, 2) flexion, 3) rotation, and 4) lateral flexion. OBJECTIVE: This study examined the intensity and pattern of neck muscle use evoked by various movements of the head. The results will help elucidate the pathophysiology, and thus methods for treating disorders of the cervical musculoskeletal system. SUMMARY OF BACKGROUND DATA: Exercise-induced contrast shifts in T2 has been shown to indicate muscle use during the activity. The noninvasive nature of magnetic resonance imaging appears to make it an ideal approach for studying the function of the complex neuromuscular system of the neck. METHODS: The extent of T2 increase was examined to gauge how intensely nine different neck muscles or muscle pairs were used in seven subjects. The absolute and relative cross-sectional area of muscle showing a shift in signal relaxation was assessed to infer the pattern of use among and within individual neck muscles or muscle pairs. RESULTS: Signal relaxation increased with exercise intensity for each head movement. The absolute and relative cross-sectional area of muscle showing a shift in signal relaxation also increased with exercise load. Neck muscles or muscle pairs extensively used to perform each head movement were: extension--semispinalis capitis and cervicis and splenius capitis; flexion--sternocleidomastoid and longus capitis and colli; rotation--splenius capitis, levator scapulae, scalenus, semispinalis capitis ipsilateral to the rotation, and sternocleidomastoid contralateral; and lateral flexion--sternocleidomastoid CONCLUSION: The results of this study, in part, agree with the purported functions of neck muscles derived from anatomic location. This also was true for the few selected muscles that have been examined in human electromyographic studies. Neck muscle function and morphology can be studied at a detailed level using exercise-induced shifts in magnetic resonance images. |
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Authors:
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M S Conley; R A Meyer; J J Bloomberg; D L Feeback; G A Dudley |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Spine Volume: 20 ISSN: 0362-2436 ISO Abbreviation: Spine Publication Date: 1995 Dec |
Date Detail:
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Created Date: 1996-05-30 Completed Date: 1996-05-30 Revised Date: 2010-03-24 |
Medline Journal Info:
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Nlm Unique ID: 7610646 Medline TA: Spine (Phila Pa 1976) Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 2505-12 Citation Subset: IM; S |
Affiliation:
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Department of Exercise Science, University of Georgia, Athens, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Female Head / physiology Humans Magnetic Resonance Imaging Male Muscle Contraction / physiology Neck Muscles / anatomy & histology, physiology* Physical Exertion / physiology Rotation |
| Investigator | |
Investigator/Affiliation:
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D L Feeback / JSC; J J Bloomberg / JSC |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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