著者

宇田 宙照 福島 充也 後藤 康夫 池田 均 塚西 茂昭 信原 克哉

出版者

日本肩関節学会

雑誌

肩関節 (ISSN:09104461)

巻号頁・発行日

vol.13, no.1, pp.11-15, 1989-11-01 (Released:2012-11-20)

参考文献数

3

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The clavicular movement during active elevation of the upper limb was analyzed in this study. Sixty right shoulders in normal sugjects were investigated by using “ Chneradiography” and the “ personal image analysis system”. The lateral lower margin and the conoid tubercle of the clavicle were measured as the points which demonstrate clavicular movement.During elevation of the upper limb in the scapular plane, the elevated ang l e s of the clavicle were calculated with the scapular movement in the following stages; “ setting phase”, the “ hanging joint” prase, “ transit zone”, and the “ joint needing support” phase.The results were as follows:1. The elevated angles of the clavicle increased gradually during elevation of the upper limb. Finally the average of maximum elevated angles of the clavicle was 41.5 degrees at 150degrees of the arm-trunk angle. We noticed the clavicular movement for every 10 degrees was uneven in this study.2. No remarkab l e elevation was noted in the “ setting phase”. The elevated angles of the clavicle reached 4.22 degrees during the setting phase. Clavicular movement is similar to scapular movement, however, it was slightly irregular and unstable.3. In the “ hanging joint” phase, the elevated angle of the clavicle was 3.69 degrees forevery 10 degrees.4. In “ transit zone”, the elevated angle of the clavicle was 4.02 degrees for every 10degrees. The ratio of clavicular movement was closest to the scapular movement in this phase. And this movement was the most characteristic.5. In the final stage, in the “ joint needing support” phase, the elevated angle of the clavicle increased 4.22 degrees of the elevation of the upper limb.6. The absolute relationship between scapular and clavicu l a r movements were obtained from these results.