Synopsis
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. 1917 Excerpt: ...neck of the humerus. As viewed from before, the subscapularis replaces the teres minor. When the long head of the triceps is in position it descends in front of the teres minor, and behind the teres major. It therefore passes through the triangular space and divides it into two, one triangular and the other quadrangular. Triangular Space.--This, as viewed from behind, is bounded above by the teres minor, below by the teres major, and externally by the long head of the triceps. As viewed from before, the subscapularis replaces the teres minor. The dorsalis scapulae artery passes backwards through this space, so long as the subscapularis forms one of its boundaries, but thereafter, and as seen from behind, it only lies in it preparatory to piercing the teres minor and winding round the axillary border. Quadrangular Space.--This space, as viewed from behind, is bounded above by the teres minor, below by the teres major, internally by the long head of the triceps, and externally by the surgical neck of the humerus, the subscapularis replacing the teres minor in front. The structures which pass through it are the circumflex nerve and posterior circumflex vessels. It is covered by the deltoid. Scapular Anastomoses of Arteries.--The anastomoses of arteries upon the scapula are divided into two sets--scapular proper, and acromial. Scapular Anastomoses Proper.--The arteries which take part in these anastomoses are (1) the suprascapular and posterior scapular, representing the subclavian; and (2) the dorsalis scapulae of the subscapular, representing the third part of the axillary. The suprascapular is a branch of the thyroid axis of the first part of the subclavian, and the posterior scapular arises from the transverse cervical, which is also a branch of the thyroid...
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