Volume 1

On the anatomy, physiology, and pathology of the chimpanzee / by Charles F. Sonntag.

  • Sonntag, Charles F. (Charles Frederick), -1925
Date:
1923
Catalogue details

Licence: In copyright

Credit: On the anatomy, physiology, and pathology of the chimpanzee / by Charles F. Sonntag. Source: Wellcome Collection.

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    There is no anastomosis round the elbow joint as there is in Man. The Radial Artery (text-fig. 39 A), which is the largest vessel in the forearm, runs down the forearm very superficially, curves round the back of the wrist and over the trapezium, and passes into the first interosseous space, so it is divisible into three parts as in Man. The first part, lying in the forearm, gives off the following branches :—1. A large muscular artery to the supi- nator brevis (S.B); 2. Numerous fine twigs to the superficial flexor muscles; 3. Anterior radial carpal artery (A.R.C.A), which arises in the upper third of the forearm, runs down parallel to the radial artery, and crosses behind it in the lower part of the forearm. It ends by a series of arteries over the palmar ligaments of the inferior radio-ulnar, radio-carpal, inter- carpal, and carpo-metacarpal joints. It also supplies the flexor muscles ; 4. Superficialis voice (S.Y.A) runs downwards and in- wards across the thenar eminence and supplies its muscles. And it is continued along the inner border of the poll ex. It gives off a fine twig which curves inwards and helps to form the irregular superficial palmar arch. The second part of the artery, lying on the trapezium, gives off twigs to the dorsal aspect of the inter- carpal joints (D.C.B), and a muscular artery to the first dorsal interosseous muscle (D.I.M). From the dorsal carpal branch there rises a vessel to the adjacent sides of the dorsal aspect of the index and medius. The third part of the artery lies in the interval between the palmar aspects of the index and pollex. It gives off a thenar artery (T.A) to the thenar muscles, a muscular artery to the first dorsal interosseous muscle (D.I.M), several adductor twigs and branches to the lumbricales. Over the heads of the metacarpal bones it gives a branch to the radial side of the index finger. The Ulnar Artery (text-fig. 39 B, U.A) runs downwards as in Man, curves round the mesial aspect of the pisiform bone and enters the palm. It bifurcates about the middle of the palm. One branch runs to the inner border of the minimus ; and the second divides into two branches which supply respectively, the adjacent sides of the minimus and annularis, and annularis and medius. From the latter branch, two arteries pass to join with branches of the radial artery and form the superficial and deep palmar arches. As the artery turns round the pisiform it gives off a dorsal branch which curves round the ulnar border of the manus to supply the tissues on the back of the ulnar border of the carpus. The anterior interosseous artery (text-fig. 39 B, A.I.A) is as in Man. Three palmar arterial arches are present (text-fig. 39 A):— (1) The deep arch (D.A), lying in front of the carpus, is formed by a branch of the ulnar artery, the superficialis volse, and the branch of the radial artery to the thenar eminence : (2) the superficial arch (S.A), lying in the front of the deep arch, is [66]
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