. Cunningham's Text-book of anatomy. Anatomy. 214 OSTEOLOGY. forn^s an epiphysis which unites with the shaft about sixteen. In this connexion Fawcett (Proc. Anat. Soc. Great Britain and Ireland, 1904, p. xxvii) has described the occurrence Subcutaneous SURFACE Head Neck Interosseous crest Post, oblique line Olecranon of two ossific centres in the olecranon. One, the more volar, the "beak centre,"enters into the formation of the proximal end of the articu- lar surface of the semilunar notch, the other centre, not in any way forming it. A scale-like centre appears in the cartilage of t
. Cunningham's Text-book of anatomy. Anatomy. 214 OSTEOLOGY. forn^s an epiphysis which unites with the shaft about sixteen. In this connexion Fawcett (Proc. Anat. Soc. Great Britain and Ireland, 1904, p. xxvii) has described the occurrence Subcutaneous SURFACE Head Neck Interosseous crest Post, oblique line Olecranon of two ossific centres in the olecranon. One, the more volar, the "beak centre,"enters into the formation of the proximal end of the articu- lar surface of the semilunar notch, the other centre, not in any way forming it. A scale-like centre appears in the cartilage of the head about the sixth year, from which the distal surface of that part of the bone is developed, and by the extension of which the styloid process is also ossified ; this epiphysis does not unite with the shaft till the twen- tieth or twenty-third year. Independent centres for the styloid process and for the extreme edge of the olecranon have also been described. The student may here be warned that the epiphysial line be- tween the shaft and superior or olecranon epiphysis does not correspond to the con- stricted part of the semilunar notch, but lies considerably above it. The Radius. The radius, or lateral bone of the forearm, is shorter than the ulna, with which it is united on the medial side. Proximally it articulates with the hum- erus, and distallyit supports the carpus. It consists of a head, a neck, a tuberosity, a shaft, and an expanded distal extremity. The shaft is narrowproximally,but in- creases in all its diameters distally. Proximal Extremity. —The capitulum (head) is disc-shaped and provided with a shallow concave sur- face (fovea capituli radii) proximally for articulation with the capitulum of the humerus. The circumfer- ence of the head (circum- ferentiaarticularis) is smooth and is embraced by the annular ligament. On the medial side it is usually much broader, and displays an articular surface, plane in the proximo-distal direction, Styloid process. Gro
Size: 986px × 2533px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
