Three-Dimensional Analysis of Scapular Kinematics During Arm Elevation in Baseball Players With Scapular Dyskinesis: Comparison of Dominant and Nondominant Arms

The knowledge of 3-dimensional scapular kinematics is essential for understanding the pathological lesions of the shoulder and elbow in throwing athletes. Many studies about alterations of the resting scapular position, dynamic scapular motion, or scapular dyskinesis (SD) have been conducted, yet no...

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Bibliographic Details
Published in:Journal of sport rehabilitation 2020-01, Vol.29 (1), p.93-101
Main Authors: Park, Jin-Young, Kim, Junhyun, Seo, Beom Ho, Yu, Ho Dong, Sim, Ju Hyun, Lee, Jae Hyung, Oh, Kyung Soo, Chung, Seok Won
Format: Article
Language:English
Subjects:
Adolescent
Adult
Athletic Injuries - diagnostic imaging
Athletic Injuries - physiopathology
Baseball
Baseball - physiology
Biomechanical Phenomena
Cross-Sectional Studies
Dimensional analysis
Elbow Joint - diagnostic imaging
Elbow Joint - physiopathology
Functional Laterality - physiology
Humans
Imaging, Three-Dimensional
Kinematics
Range of Motion, Articular
Scapula - diagnostic imaging
Scapula - physiopathology
Shoulder Injuries - diagnostic imaging
Shoulder Injuries - physiopathology
Tomography, X-Ray Computed
Young Adult
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Summary:The knowledge of 3-dimensional scapular kinematics is essential for understanding the pathological lesions of the shoulder and elbow in throwing athletes. Many studies about alterations of the resting scapular position, dynamic scapular motion, or scapular dyskinesis (SD) have been conducted, yet none of them have identified a consistent pattern of altered scapular kinematics in throwing athletes. Hypothesis/Purpose: To analyze the 3-dimensional scapular kinematics of dominant and nondominant arms in baseball players with a pathological condition of the shoulder or elbow. Cross-sectional study. Bilateral scapular positions, consisting of upward rotation (UR), superior translation (ST), internal rotation (IR), protraction (PRO), and anterior tilting (AT) with an arm at rest and at 150° forward elevation, were measured among 319 baseball players with SD using 3-dimensional computed tomography. Angular values of scapula were compared between dominant and nondominant arms with statistical analysis. Level III, diagnostic study. The scapular position of dominant arms showed significantly more AT, less ST at rest and more UR and IR and less ST, PRO, and AT at 150° full forward elevation compared with the nondominant arms. The magnitude of mean change of UR, IR, PRO, and AT during arm elevation increased significantly between the paired arms (P value: UR, ST, PRO, and AT:
ISSN:1056-6716
1543-3072
DOI:10.1123/jsr.2017-0216