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Microinstability of the Shoulder
Korean J Sports Med 2018;36:173-179
Published online December 1, 2018;  https://doi.org/10.5763/kjsm.2018.36.4.173
© 2018 The Korean Society of Sports Medicine.

Jun-Gyu Moon, Jung-Hoon Kim

Department of Orthopedic Surgery, Korea University Guro Hospital, Seoul, Korea
Correspondence to: Jun-Gyu Moon
Department of Orthopedic Surgery, Korea University Guro Hospital, 148 Gurodong-ro, Guro-gu, Seoul 08308, Korea
Tel: +82-2-2626-3089, Fax: +82-2-2626-1163
E-mail: moonjg@korea.ac.kr
Received October 15, 2018; Revised November 19, 2018; Accepted November 27, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
A variety of theories have been reported as causes of shoulder pain in overhead throwing athletes. Recently, an explanation with microinstability of the shoulder and internal impingement has been proposed. The concept of the microinstability is that pathologic laxity of the anterior capsule caused by repeated abduction and external rotation of the shoulder leads to abnormal glenohumeral biomechanics and causes internal impingement of the shoulder. Based on the understanding of the pathology, it is recommended to identify the causes of shoulder pain in the overhead throwing athletes and perform appropriate rehabilitation or surgical treatment.
Keywords : Shoulder, Microinstability, Internal impingement
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