Special Anatomy and Histology (Volume 1)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1840 Excerpt: ...of the spine. These two trunks terminate at their upper end by an anastomosis, through the anterior condyloid foramen, with the internal jugular: they also terminate by anastomosis with the anterior occipital sinus and with the vertebral veins. G. Brcschct, Essai sur les Veincs du rachit. Paris, 1819. From the arrangement of these sinuses, it appears that each bone of the spine has its own venous system or circle; which also is the case in regard to the corresponding section of medulla spinalis in early life, when it occupies the whole length of the spine. Each of these circles, by the freedom of their anastomoses, therefore, forms a link in a long chain of venous circles belonging to the structure of the spine. SKCT. II. OF THE VE1XS OF THE UPPER EXTREMITIES. The veins of the upper extremities are superficial and deepseated, and arise from the distribution of the arteries. The Deep-seated Veins are found in company with each arterial ramification, th, cre being two veins to one artery generally. We thus have them observing the course of the arteries of the hand, of the fore arm, of the arm, and of the shoulder. At the bend of the arm, the two radial and the two ulnar veins coalesce into the two brachial veins, which attend the brachial artery, one on each of its sides, and at intervals throw anastomotic branches across it. Sometimes, but one of these trunks exists, with the exception of the lower part of the arm, where there are most commonly two. The trunk (or trunks, as the case may be, ) is joined by the basilic vein, at a point varying from the middle of the arm to the axilla. These venae comites, or satellites, are invariably called after the arteries which they attend, and having no difference from the latter in relative situation, a farther descriptio.