Practical anatomy: a manual of dissections / by Christopher Heath.

  • Christopher Heath
Date:
1870
Catalogue details

Licence: Public Domain Mark

Credit: Practical anatomy: a manual of dissections / by Christopher Heath. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

    44/600 (page 34)
    ribs for its fixed point, the scapula is drawn forward, the bone gliding over the ribs and a quantit}^ of loose cellular tissue which lies upon them. The serratus is supplied by the posterior thoracic nerve. Insertions of the Latissimus Dor si and Teres Major.— The upper part of the latissimus winds round the lower angle of the scapula, which it envelops in a sort of fold, and ends in a broad, thin tendon, which passes in front of the teres major to be inserted into the bottom of the bicipital groove of the humerus above the level of the teres major. The tendon of the latissimus dorsi [like that of the pectoralis major] is twisted, so that the fibres of the muscle, which were highest at their origin, are lowest at their insertion, and vice versa, and it is the narrowest of the three tendons inserted into the bicipital groove. The teres major, which is fleshy throughout, passes be- hind the tendon of the latissimus being more or less incor- porated with it, and is inserted into the inner or posterior edge of the bicipital groove, exactl}^ opposite the pectoralis major, a bursa being formed between the insertions of the latissimus and teres. Opportunity should be taken, when the clavicle is divided by the dissector of the neck, to trace the axillary nerves to their origins, and to study the brachial plexus, the de- scription of which is given with the Posterior Triangle. The Front of the Upper Arm. An incision is to be made down the front of the arm to three inches below the bend of the elbow, and the skin is to be reflected on each side for a couple of inches, to allow of the dissection of the superficial nerves and veins. The Internal Cutaneous Nerve ([Fig. 3, i8, p. 29] Fig. 6, 15) is to be followed out from the inner cord of the plexus to the forearm. It lies at first to the inner side of the axillary arterj^, and then, piercing the deep fascia at or near the point at which the basilic vein enters, it runs in front of the inner condyle and generally over the median basilic vein, to end in branches to the upper and inner side of the forearm. A posterior branch winds above the inner condyle to the back of the forearm. The Lesser Internal Cutaneous Nerve (nerve of Wrisberg) (Figs. 3, 20 and 4, 20), if it exists, pierces the fascia at a variable point, and after joining with the inter- costo-humeral nerve, supplies the inner side of the upper arm.