Modern surgery, general and operative . us luxation is a rare injury. Pick metwith this accident in a man who, while havinghis hands in his pockets, fell upon the front ofthe point of the shoulder. The head of the bone reposes beneath thescapular spine, between the infraspinatus and teres minor muscles. Supracoracoid luxation is seldom encountered. The head of the humerusrests upon the coraco-acromial ligament or upon the acromion process, andthe acromion or the coracoid is always fractured. Luxatio Erecta.—In this injury the arm is markedly abducted and in somecases the elbow is actually rais
Modern surgery, general and operative . us luxation is a rare injury. Pick metwith this accident in a man who, while havinghis hands in his pockets, fell upon the front ofthe point of the shoulder. The head of the bone reposes beneath thescapular spine, between the infraspinatus and teres minor muscles. Supracoracoid luxation is seldom encountered. The head of the humerusrests upon the coraco-acromial ligament or upon the acromion process, andthe acromion or the coracoid is always fractured. Luxatio Erecta.—In this injury the arm is markedly abducted and in somecases the elbow is actually raised above the patients head. • As a rule, theforearm rests behind the occiput, sometimes on the top of the head. Thepatient holds the forearm to the occiput or vertex to avoid pain. It is, inreality, a form of subglenoid luxation. In such an injury the head of thebone has passed under the subscapularis muscle and also under the teresmajor or the lower border of the great pectoral. Judd, Hulke, Cleland, andothers have reported Fig. 401.—Axillary dislocation ofthe right humerus. Dislocation of the Humerus 66 = Symptoms of Dislocation of the Shoulder-joint.—Dislocation is diagnos-ticated by—(i) pain of a sickening character; (2) flattening of the shoulder,the head of the bone having ceased to bulge out the deltoid muscle; (3) ap-parent projection of the acromion through sinking in of the deltoid; (4) hol-low beneath the acromion, over the empty glenoid cavity, and the bonemissing from its normal habitat. This hollow may be easily appreciated bythe finger, especially when the extremity is somewhat abducted; (5) rigidity(some movement is possible in the direction especially of an existing de-formity, but mobility is strictly limited and attempts at motion producegreat pain); (6) Dugass sign: the elbow cannot touch the side when the handis placed upon the sound shoulder, and the hand cannot be placed upon thesound shoulder if the elbow is to the side (this is due to
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