. Un traité pratique sur les fractures et luxations. e les deux beenfound cassé, mais cette blessure semble avoir été purement incidentaland devrait être considérée comme une complication. La tête de l'humérus se trouve sur le bord de la fosse glénoïde,ou plus en arrière contre le côté du cou de l'omoplate, et eitherclose contre le bec de l'Apophyse coracoïde derrière le coraco-brachiale et la tête courte du biceps, ou plus bas à un distancedetermined par ses relations au Scapulaire et par la tension de l'untorn partie de la capsule. Il peut se trouver en grande partie sur l'extérieur l'chaque côtédu

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. A practical treatise on fractures and dislocations. e both beenfound broken, but such injury appears to have been purely incidentaland should be classed as a complication. The head of the humerus lies against the edge of the glenoid fossa, or further back against the side of the neck of the scapula, and eitherclose up against the beak of the coracoid process behind the coraco-brachialis and the short head of the biceps, or lower down at a distancedetermined by its relations to the subscapularis and by the tension ofthe untorn portion of the capsule. It may lie largely on the outer sideof the coracoid process, or immediately below it, or it may pass entirelyto its inner side (intracoracoid dislocation), and it may be in outwardor inward rotation (Fig. 377) or in any intermediate attitude. As has been already said, avulsion of the tuberosities may take theplace of laceration of the nuiscles attached to them ; this has beenrarely noted of the lesser tuberosity, but frequently of the greater 1PArcy Power: Lancet, November 24, 1888. ¥m. 377.. Subcoracoid dislocation : to showthe different degrees of rotation ofthe humerus in different positions. 622 JDISLOCATIOXS. and especially of its upper and middle facets. Von Thaden/ whomade a study of this feature, found that the upper and middle facetswere each sometimes torn off separately, but the lower one only inconnection with the other two. The complication is of importancebecause of the consequent loss of the control of the attached musclesover the humerus and the consequent exposure to recurrence of thedislocation (see Chapter XXIX.), and because it opens the way forthe escape of the long tendon of the biceps from its groove and itsinterposition between the humerus and its socket in such a way as to con-stitute a serious obstacle to reduction. In the specimens Von Thadenexamined he found the tendon thus interposed three times. Korte^reported a similar case in which the tendon had slipped entirely outof its groove and was

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