. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 590 ABNORMAL CONDITIONS OF THE SHOULDER JOINT. bicipital groove. It was remarkable that the acromion process and other portions of bone, te. Case of J. Byrne. — Chronic rheumatic arthritis. a, line of complete division of the acromion into two portions; b, coracoid process; c, acromial end of the clavicle, worn by the attrition of the head of the hnmerus; d, tendon of the biceps adherent to the bone; e, glenoid cavity ; f, capsule widen- ed ; foreign bodies attached to it. viz. the outer extremity of the clavicle a
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 590 ABNORMAL CONDITIONS OF THE SHOULDER JOINT. bicipital groove. It was remarkable that the acromion process and other portions of bone, te. Case of J. Byrne. — Chronic rheumatic arthritis. a, line of complete division of the acromion into two portions; b, coracoid process; c, acromial end of the clavicle, worn by the attrition of the head of the hnmerus; d, tendon of the biceps adherent to the bone; e, glenoid cavity ; f, capsule widen- ed ; foreign bodies attached to it. viz. the outer extremity of the clavicle and coracoid process, had acquired size and density, although their under surfaces were much worn and excavated where they formed an arch which overhung the humerus. These appear- ances showed the great degree of friction and pressure from below upwards which these bones had been subjected to, from the head of the humerus being constantly drawn up- wards by muscular action. We also noticed that the acromion process was traversed from wit/iin outwards by a perfect solution of con- tinuity, completely dividing it into two nearly equal portions. This might be supposed by some to have been a fracture which never had been united by bone—an opinion which, however, we did not entertain ; the two pieces of the acromion were on a perfect and uniform level, and the edges of the separated portions of bone exhibited no evidence of any ossific de- posit, nor any such appearances as would lead us to infer that a fracture had existed. The glenoid cavity of the scapula was larger and deeper, and more of a cup-like form than usual. The cartilage of encrustation and glenoid ligament were removed, the sur- face of the cavity presented a porous appear- ance. Along its inner margin were arranged several round and firm cartilaginous granules. The head of the humerus was somewhat enlarged. The articular surface had become extended over the superior margin of the greater and lesser tuberosity. Muc
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