Rotation Control of Shoulder Joint During Shoulder Internal Rotation: A Comparative Study of Individuals With and Without Restricted Range of Motion

• 영문명: Rotation Control of Shoulder Joint During Shoulder Internal Rotation: A Comparative Study of Individuals With and Without Restricted Range of Motion
• 발행기관: 한국전문물리치료학회
• 저자명: Min-jeong Chang Jun-hee Kim Ui-jae Hwang Il-kyu Ahn Oh-yun Kwon
• 간행물 정보: 『한국전문물리치료학회지』제31권 제1호, 72~78쪽, 전체 7쪽
• 주제분류: 의약학 > 재활의학
• 파일형태: PDF
• 발행일자: 2024.04.30

영문 초록

Background: Limitations of shoulder range of motion (ROM), particularly shoulder internal rotation (SIR), are commonly associated with musculoskeletal disorders in both the general population and athletes. The limitation can result in connective tissue lesions such as superior labrum tears and symptoms such as rotator cuff tears and shoulder impingement syndrome. Maintaining the center of rotation of the glenohumeral joint during SIR can be challenging due to the compensatory scapulothoracic movement and anterior displacement of the humeral head. Therefore, observing the path of the instantaneous center of rotation (PICR) using the olecranon as a marker during SIR may provide valuable insights into understanding the dynamics of the shoulder joint. Objects: The aim of the study was to compare the displacement of the olecranon to measure the rotation control of the humeral head during SIR in individuals with and without restricted SIR ROM. Methods: Twenty-four participants with and without restricted SIR ROM participated in this study. The displacement of olecranon was measured during the shoulder internal rotation control test (SIRCT) using a Kinovea (ver. 0.8.15, Kinovea), the 2-dimensional marker tracking analysis system. An independent t-test was used to compare the horizontal and vertical displacement of the olecranon marker between individuals with and without restricted SIR ROM. The statistical significance was set at p < 0.05. Results: Vertical displacement of the olecranon was significantly greater in the restricted SIR group than in the control group (p < 0.05). However, no significant difference was observed in the horizontal displacement of the olecranon (p > 0.05). Conclusion: The findings of this study indicated that individuals with restricted SIR ROM had significantly greater vertical displacement of the olecranon. The results suggest that the limitation of SIR ROM may lead to difficulty in rotation control of the humeral head.

목차

INTRODUCTION

MATERIALS AND METHODS

RESULTS

DISCUSSION

CONCLUSIONS

FUNDING

ACKNOWLEDGEMENTS

CONFLICTS OF INTEREST

AUTHOR CONTRIBUTION

ORCID

REFERENCES

키워드

Glenohumeral joint center of rotation Rotation control of the humeral head Shoulder internal rotation Shoulder joint