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Show 688 MR. F. G. PARSONS ON THE [Nov. 20, The circumflex nerve rises from the 5th and 6th C. and winds round the neck of the humerus in the usual way, supplying the teres minor and deltoid muscles. Fig. 7. Brachial Plexus. a. Suprascapular. b. Nerve to subscapulars. c. Circumflex. d. Musculo-cutaneous. e. Musculo-spiral. /. Median. g. Ulnar. h. Internal cutaneous. i. Internal anterior thoracic. Je. Nerve to Latissimus dorsi. (The origin of this is only approximate.) The external cutaneous is bound up for some little distance with the median, its fibres being derived from the 6th and 7th C. It supplies and pierces the coraco-brachialis and then divides into two branches, the larger of which supplies the biceps, while the smaller runs down to the front of the elbow, Avhere it communicates with the median and sends a small branch to the short head of the brachialis anticus ; after this it crosses deep to the biceps aud supplies part of the outer side of the forearm. |