Construct validity of muscle force tests of the rotator cuff muscles: an electromyographic investigation

Physical Therapy
Rebecca L BrookhamClark R Dickerson

Abstract

Manual muscle tests (MMTs) are used in clinical settings to evaluate the function and strength (force-generating capacity) of a specific muscle in a position at which the muscle is believed to be most isolated from other synergists and antagonists. Despite frequent use of MMTs, few electromyographic evaluations exist to confirm the ability of MMTs to isolate rotator cuff muscles. This study examined rotator cuff isolation during 29 shoulder muscle force tests (9 clinical and 20 generic tests). An experimental design was used in this study. Electromyographic data were recorded from 4 rotator cuff muscles and 10 additional shoulder muscles of 12 male participants. Maximal isolation ratios (mean specific rotator cuff muscle activation to mean activation of the other 13 recorded muscles) defined which of these tests most isolated the rotator cuff muscles. Three rotator cuff muscles were maximally isolated (obtained highest isolation ratios) within their respective clinical test groups (lateral rotator test group for the infraspinatus and teres minor muscles and abduction test group for the supraspinatus muscle). The subscapularis muscle was maximally isolated equally as effectively within the generic ulnar force and clinical medial...Continue Reading

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Citations

Dec 18, 2013·Journal of Shoulder and Elbow Surgery·Iwein PiepersLieven De Wilde
Nov 22, 2015·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Binh P T Ngo, Richard P Wells
Nov 1, 2011·Journal of Shoulder and Elbow Surgery·Yoshihiro KaiNaoto Shiba
Jul 21, 2015·Journal of Biomechanics·Cathryn D PeltzMichael J Bey
May 15, 2015·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Sangeeta RathiRodney A Green
Jan 1, 2014·Physiotherapy Theory and Practice·Michael T CibulkaJack Bennett
Jan 24, 2016·Archives of Physical Medicine and Rehabilitation·Fabien Dal MasoMickaël Begon
Apr 7, 2016·The Journal of Orthopaedic and Sports Physical Therapy·A Burke GurneyJames G Gurney
Apr 1, 2021·Orthopaedic Journal of Sports Medicine·Kaysha HeckFederico Pozzi

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