Applied anatomy and kinesiology; the mechanism of muscular movement . Fig, 55.—Position of scapulae when arms are raised through 90 degrees. the deltoid begin to act to aid the middle part, and the upper trape-zius also contracts. The upper 45 degrees of elevation takes placein the shoulder-joint only. When the elevation is sideward the armmust be rotated outward, preferably when near shoulder level, toprevent the locking of the shoulder-joint by contact of the bonesat the top of the joint. When the arms are carried well to the rearat the completion of the movement of elevation, and especially
Applied anatomy and kinesiology; the mechanism of muscular movement . Fig, 55.—Position of scapulae when arms are raised through 90 degrees. the deltoid begin to act to aid the middle part, and the upper trape-zius also contracts. The upper 45 degrees of elevation takes placein the shoulder-joint only. When the elevation is sideward the armmust be rotated outward, preferably when near shoulder level, toprevent the locking of the shoulder-joint by contact of the bonesat the top of the joint. When the arms are carried well to the rearat the completion of the movement of elevation, and especially. Fig. 5G
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Keywords: ., bookcentury1900, booksu, booksubjectphysicaleducationandtraining