. Cunningham's Text-book of anatomy. Anatomy. THE PHALANGES. 227 in. Phalanx, ungual or terminal II. Phalanx the collateral ligaments of the metacarpophalangeal joint, and also to the interossei muscles. The distal end is much smaller than the proximal; the convex articular surface is divided into two condyles by a central groove running from before backward. The phalanx secunda (second phalanx) resembles the first in general form, but is of smaller size. It differs, however, in the form of its proximal articular surface, which is not a simple oval concavity, but is an oval area divided into t
. Cunningham's Text-book of anatomy. Anatomy. THE PHALANGES. 227 in. Phalanx, ungual or terminal II. Phalanx the collateral ligaments of the metacarpophalangeal joint, and also to the interossei muscles. The distal end is much smaller than the proximal; the convex articular surface is divided into two condyles by a central groove running from before backward. The phalanx secunda (second phalanx) resembles the first in general form, but is of smaller size. It differs, however, in the form of its proximal articular surface, which is not a simple oval concavity, but is an oval area divided into two small, nearly circular con- cavities by a central ridge passing from volar to dorsal edge; these articulate with the condylic surfaces of the proximal phalanx. Into the margins of its volar surface near the proximal end are inserted the split portions of the tendon of the flexor digitorum sublimis, whilst on the dorsal aspect of the proximal end the central slip of the extensor digitorum communis muscle is attached. The phalanx tertia (third, terminal, or ungual phalanx) is the smallest of the three; it is easily recognised by the spatula - shaped surface on its distal extremity which supports the nail. The articular surface on its proximal end resembles that on the proximal end of the second phalanx, but is smaller. On the volar aspect of this end of the bone there is a rough surface for the insertion of the tendon of the flexor digitorum profundus muscle. The dorsal surface of the same extremity has attached to it the terminal portions of the tendon of the extensor digitorum communis muscle. The phalanges of the thumb resemble in the arrangement of their parts the first and third phalanges of the fingers. The arterial canals, usually two in number, placed on either side of the palmar aspect and nearer the distal than the proximal end of the bone, are directed towards the I. Phalanx. Please note that these images are extracted from scanned page images that may
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
