Roentgenographical examination on the tilted angle of the scapula in the resting position
Torisu, T.; Himeno, S.; Mitsuyasu, T.; Sasaki, M.; Barada, H.; Nakayama, A.
Nihon Seikeigeka Gakkai Zasshi 55(3): 295-302
1981
ISSN/ISBN: 0021-5325 PMID: 7252292 Document Number: 174312
Roentgenographical examination was carried out in 56 normal human subjects ranging 12-80 yr old to evaluate the degrees of the tilted angle of the scapula in 3 dimensions at the relaxed standing position. Bilateral roentgenograms of shoulder were taken in the standard antero-posterior position and at 30.degree. oblique projections. Landmarks [5] were selected on each roentgenogram and measured by X and Y coordinates. The degrees of tilted angles of the scapula in 3 dimension were determined with the specific equations. Average angle of medial tilt of the scapula was 32.1.degree. (.+-. 7.0.degree.) on the right and 31.9.degree. (.+-. 8.0.degree.) on the left. Average angle of the medial tilt of the scapula was 29.9.degree. (.+-. 7.7.degree.) in males and 34.0.degree. (.+-.6.5.degree.) in females. The average angle of medial tilt of the scapula decreased with age. Average angle of downward tilt of the scapula was 11.5.degree. (.+-. 12.5.degree.) on the right and 12.3.degree. (.+-. 11.1.degree.) on the left. Average angle of the downward tilt of the scapula in was 12.9.degree. (.+-. 12.7.degree.) in males and 10.8 (.+-. 10.7.degree.) in females. Average angle of downward tilt of the scapula statistically increased with age (r = 0.34). Average angle of upward rotation of the scapula increased with age. Restricted rotation of the scapula may be a major cause of restricted abduction of the shoulder in the aged.