. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. ABNORMAL CONDITIONS OF THE SHOULDER JOINT. 610 shoulder joint was dissected by Mr. Macna- mara, from whom I take the description of the appearances, with the advantage of having the preparation before me while I write. The dislocation was unattended with rup- ture of any muscle, or the separation of any tendon from its insertion into the bone ; by a slight effort the dislocation was reproduced, and the pectoral muscles being removed, the polished head of the bone was now seen lodged on the cervix of the scapula, at the'r
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. ABNORMAL CONDITIONS OF THE SHOULDER JOINT. 610 shoulder joint was dissected by Mr. Macna- mara, from whom I take the description of the appearances, with the advantage of having the preparation before me while I write. The dislocation was unattended with rup- ture of any muscle, or the separation of any tendon from its insertion into the bone ; by a slight effort the dislocation was reproduced, and the pectoral muscles being removed, the polished head of the bone was now seen lodged on the cervix of the scapula, at the'root of the coracoid process, but extend- ing nearly as far as the notch in the superior margin of the scapula. The head of the bone had passed out through a rent in the capsu- lar ligament, over the upper edge of the tendon of the subscapularis, detaching this muscle from its connection, which is at this point but slight, with the inner surface of the scapula, and pushing its fibres downwards, so that they formed a curve, which partly embraced the neck of the humerus (fig. 437.). The supra- and infra-spinatus mus- cles were on the stretch, but had suffered no injury. The cellular substance cover- ing their tendons was deeply ecchymosed, so as to mark their course most distinctly. On replacing the head of the bone, the open- ing in the capsular ligament through which it Fig. Dislocation forwards and inwards. ( Sir P. Cramp- tons case.) had escaped from its socket, could be dis- tinctly seen. It was formed, by a separation of the ligament from the interior side of the brim of the glenoid cavity from top to bottom, it was bounded at the top by the tendon of the supra-spinatus, and at the bottom by the inferior edge of the tendon of the subscapu- laris ; the rent was continued as far as the root of the lesser tubercle of the os hunieri, and was of sufficient extent, but no more, to per- mit the head of the bone to pass easily through it. The inferior part of the capsular lig
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