Archive image from page 726 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 WRIST-JOINT (ABNORMAL ANATOMY). loll extremity was destitute of the rounded head, which in the normal state is received into the concavity of the radius, and was carried for- wards outwards and upwards (see fg. 927.). About half an inch above the level of its lower extremity it was in contact with the rail ins by a very small surface which was destitute of cartilage. An anterior and pos- terior ligament connected the two bones in this situation, and permitte
Archive image from page 726 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana0402todd Year: 1849 WRIST-JOINT (ABNORMAL ANATOMY). loll extremity was destitute of the rounded head, which in the normal state is received into the concavity of the radius, and was carried for- wards outwards and upwards (see fg. 927.). About half an inch above the level of its lower extremity it was in contact with the rail ins by a very small surface which was destitute of cartilage. An anterior and pos- terior ligament connected the two bones in this situation, and permitted a very slight, degree of motion between them. The lower extremity of the radius was totally destitute of articulating surface, and was represented by a rounded and blunt margin. The surface for articulation with the carpus was placed altogether on the anterior aspect of the bone. It consisted of a deep excava- tion of an oblong form, and its longest diame- ter running somewhat transversely ; it was tolerably smooth, though not invested with cartilage. The radius and ulna were not only remark- ably short, but likewise atrophied, both as to breadth and thickness. Their superior extremities, with the excep- tion of being unusually small, presented no abnormal appearance. The bones of the first row of the carpus were in a state of atrophy, especially the semi-lunar bone. When the hand was flexed at a right angle with the forearm, the lower end of the ulna formed a most conspicuous projection, while during extension, two pro- minences were seen ; one, in front, caused by the carpus, the other posteriorly, mark- ing the position of the lower extremities of the bones of the forearm. The hand was inclined to the radial side of the forearm ; it admitted of being flexed to a right angle, and could be extended perfectly. The ex- tensor tendons in their passage from the forearm to the hand were lodged in deep and narrow grooves, or channels, formed on the dorsal aspect of the radius. U
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