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Electromyographic analysis of shoulder impingement syndrome versus normal subjects
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R Khanmohammadi *   1, S Talebian , A Shadmehr , E Entezari |
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Abstract: (9698 Views) |
Background and aim: Altered muscle activity in the scapulothoracic and
glenohumeral muscles is commonly believed to be a factor contributing to shoulder
impingement syndrome (SIS), then, the aim of the study was to determine and
compare the activity pattern of the shoulder muscles in subjects with and without
SIS.
Materials & Methods: In this case-control study, 9 female subjects with shoulder
impingement syndrome and 13 matched healthy female subjects were participated
voluntarily by simple random sampling. Surface electromyography of serratus
anterior, pectoralis major, upper trapezium, lower trapezium, posterior deltoid,
anterior deltoid muscles of dominant side were recorded during D1ext and D1flex
movement. Muscle activities were processed and compared in subjects with and
without SIS. Non parametric test (Mann-Whitney Test)) was used for data analysis
Results: In both movement patterns, all muscles of the patient showed a greater
normalized RMS than healthy group but this increase was statistically significant in
anterior deltoid (p=0/003, p=0/04), pectoralis major (p=0/01, p=0/02), serratus
anterior (p=0/01) and posterior deltoid (p=0/01) during D1ext and in lower
trapezium (p=0/005,p=0/006) and pectoralis major (p=0/01) during D1flex.
Conclusion: The results of this study indicate that patients with impingement
symptoms show abnormal muscle activity. The findings support the theory that
shoulders impingement may be related to altered muscle activity in the
scapulothoracic and glenohumeral muscles. |
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| Keywords: stroke, stroke survivors, life after stroke, barriers and facilitators |
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Full-Text [PDF 206 kb]
(3615 Downloads)
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Type of Study: Research |
Subject:
General
Received: 2011/04/13 | Accepted: 2011/06/25 | Published: 2013/08/6
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