Index to Chiropractic Literature
Index to Chiropractic Literature
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Tuesday, November 24, 2020
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ID 24114
  Title Kinematic comparison and description of the 3-dimensional shoulder kinematics of 2 shoulder rotation tests
URL http://www.jmptonline.org/article/S0161-4754%2815%2900042-1/fulltext
Journal J Manipulative Physiol Ther. 2015 May;38(4):288-294
Author(s)
Subject(s)
Peer Review Yes
Publication Type Article
Abstract/Notes

Objectives: The purpose of this study was to compare shoulder external rotation range of motion (ROM) during the hand-behind-neck (HBN) test and a standard shoulder external rotation test and to describe the 3-dimensional scapular motion during the HBN test.

Methods: An electromagnetic tracking device was used to assess the dominant shoulder of 14 healthy participants while performing active full ROM in a standard shoulder external rotation test in an elevated position (EREP) and in the HBN test. The humeral and scapular 3-dimensional positions at the end of EREP and HBN were compared using a paired-sample t test. A correlation analysis was performed between humeral and scapular angles to assess the contribution of scapular motion to the full shoulder ROM during the HBN test.

Results: No significant differences were found between the HBN test and the EREP at the end-range of the glenohumeral external rotation (HBN: 15.6° ± 6.3° vs EREP: 23.4° ± 4.7°; P = .08) and on scapular internal-external rotation (HBN test: 21.2° ± 6.3° vs EREP: 15.6° ± 1.8°; P = .23). Significant differences were found in scapular upward rotation (HBN: 21.2° ± 6.3° vs EREP: 15.6° ± 1.8°; P < .01) and scapular spinal tilt (HBN: −0.4° ± 2.3° vs EREP: 8.1° ± 2.1°; P < .01). There was a positive correlation between the humeral angles and scapular internal and posterior spinal tilt angles with the HBN test.

Conclusions: The results of the present study showed that, in young asymptomatic participants with no known shoulder pathology, the end-range of shoulder rotation was similar in the HBN test and in a standard shoulder rotation test. During the HBN test, the scapula assumed a more internal and anterior spinal tilted position at the end-range of active shoulder external rotation. These results suggest that the HBN test may be used to assess the end-range of glenohumeral external rotation.

This abstract is reproduced with the permission of the publisher; click on the above link for free full text.


 

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