The effects of finger extension on shoulder muscle activity

[Purpose] This study aims to examine the effects of the extension of the fingers (distal upper limb) on the activity of the shoulder muscles (proximal upper limb). [Subjects and Methods] This study involved 14 healthy male adults with no musculoskeletal disorder or pain related to the shoulders and...

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Published inJournal of Physical Therapy Science Vol. 27; no. 9; pp. 2719 - 2721
Main Authors Yi, Chae-Woo, Shin, Ju-Yong, Kim, Youn-Joung
Format Journal Article
LanguageEnglish
Published Japan The Society of Physical Therapy Science 2015
Subjects
Finger extension
Infraspinatus
Review
Rhomboid major
Rhomboid major
Finger extension
Infraspinatus
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Summary:[Purpose] This study aims to examine the effects of the extension of the fingers (distal upper limb) on the activity of the shoulder muscles (proximal upper limb). [Subjects and Methods] This study involved 14 healthy male adults with no musculoskeletal disorder or pain related to the shoulders and hands. The subjects in a sitting posture abducted the angle of the shoulder joints at 60° and had their palms in the front direction. Electromyography (EMG) was comparatively analyzed to look at the activities of the infraspinatus (IS) and rhomboid major (RM) when the fingers were extended and relaxed. [Results] The activity of the IS was statistically significantly higher when the fingers were extended than when they were relaxed. [Conclusion] According to the result of this study, finger extension is considered to affect the muscles for connected shoulder joint stability.
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ISSN:0915-5287
2187-5626
DOI:10.1589/jpts.27.2719