Comparison of supraspinatus cross-sectional areas according to shoulder
abduction angles |
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| Authors: | Wonan Kwon Hyunjeong Jang Ilsub Jun |
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| Affiliation: | 1) Department of Physical Therapy, Daegu Health College, Republic of Korea;2) Department of Physical Therapy, Daejeon University, Republic of Korea;3) Center of Physical Therapy, Kimjun’s Orthopaedic Clinic, Republic of Korea |
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| Abstract: | [Purpose] The purpose of this study was to determine the changes in the supraspinatuscross-sectional areas according to shoulder abduction angles, using ultrasonography.[Subjects and Methods] The subjects consisted of 40 individuals (20 males and 20 females).The cross-sectional areas of the supraspinatus of all subjects were measured withultrasonography at abduction angle of 0°, 30°, 60°, 90°, and 120°. We set four abductionangle levels (I, II, III, and IV), 0° to 30°, 30° to 60°, 60° to 90°, and 90° to 120°,respectively, when determining the largest change in cross-sectional area. [Results] Theresults revealed that cross-sectional areas of the supraspinatus increased at all levels,but the abduction angle level with the largest increase in cross-sectional area of thesupraspinatus was Level III. [Conclusion] The above results indicate that performingexercises at an abduction angle between 60° and 90° will be the most effective forsupraspinatus strengthening in clinical practice.Key words: Rotator cuff, Supraspinatus cross-sectional area, Ultrasonography |
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