. Cunningham's Text-book of anatomy. Anatomy. 212 OSTEOLOGY. Flexor digitordmsublimis Pronator teres Brachialis \ Flexor pollicis longus \ N Biceps V \ subcutaneous throughout its whole length, and a volar margin ( anterior border). The crista interossea (interosseous crest) is crisp and sharp iu the proximal three-fourths of the shaft, but becomes faint aud ill-defined in the distal fourth. ' To this, with the exception only of the part which forms the dorsal boundary of the hollow in which the tuberosity of the radius is disposed when the two bones are articulated, is attached the intero
. Cunningham's Text-book of anatomy. Anatomy. 212 OSTEOLOGY. Flexor digitordmsublimis Pronator teres Brachialis \ Flexor pollicis longus \ N Biceps V \ subcutaneous throughout its whole length, and a volar margin ( anterior border). The crista interossea (interosseous crest) is crisp and sharp iu the proximal three-fourths of the shaft, but becomes faint aud ill-defined in the distal fourth. ' To this, with the exception only of the part which forms the dorsal boundary of the hollow in which the tuberosity of the radius is disposed when the two bones are articulated, is attached the interosseous membrane which connects the two bones of the forearm. The margo dorsalis (dorsal margin), of sinuous outline, curving laterally above, and slightly medially below, is continuous proximally with the triangular subcutaneous area on the back of the olecranon, being formed by the confluence of the borders which bound that sur- face ; well marked above, it becomes faint and more rounded below, but may be traced distally to the dorsal surface of the base of the styloid process. To this border is attached an aponeurosis common to the flexor carpi ulnaris, extensor carpi ulnaris, and flexor digitorum profundus muscles. A noteworthy feature in connexion with this part of the shaft is the fact that it is subcutaneous, and can easily be felt beneath the skin throughout its whole length. The volar or anterior surface corresponds to the front and medial side of the shaft. It is described as consisting of two surfaces, a volar and a medial, which are separated by a rounded volar margin, which extends from the tuber- osity proximally towards the styloid process distally. The prominence of this ridge varies in different bones, being well marked in bones of a pronounced type, but corresponding merely to the rounding of the surfaces in poorly developed specimens. The volar aspect of the bone affords an extensive origin to the flexor digitorum profundus muscle, which clothes its volar and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
