Chambers's encyclopaedia; a dictionary of universal knowledge for the people . eriorating from the use-fulness of the limb; it is therefore, uiiad-visable to keep the limb too long in anyone position after such an injury. Thisjoint is also veiy liable to disease; but asthis is confined to the ends of the bones,tlie small portions of the latter affectedcan be readily cut out, and the arm berestored to usefulness and mobility in afew weeks. The upper extremity is supplied withblood by the brachial artery, the con-tinuation of the axillary trunk. Theveins collect into large superficial trunks,whi
Chambers's encyclopaedia; a dictionary of universal knowledge for the people . eriorating from the use-fulness of the limb; it is therefore, uiiad-visable to keep the limb too long in anyone position after such an injury. Thisjoint is also veiy liable to disease; but asthis is confined to the ends of the bones,tlie small portions of the latter affectedcan be readily cut out, and the arm berestored to usefulness and mobility in afew weeks. The upper extremity is supplied withblood by the brachial artery, the con-tinuation of the axillary trunk. Theveins collect into large superficial trunks,which unite at the bend of the el-bow, at which situation one is frequentlyselected for venesection, and then pass onto the axillary, on the outside by the cepha-lic vein, on the inner side b3-the basilic. The nerves pass down as large cordsby tlie side of the artery, and divergefrom it to their ultimate distributions;tlie musculo-spiral soon passing round atthe back to appear on the outside, and be-come the radial and posterior interos-seous nerves; the ulnar running behuid. Ha man Arm:aic, deltoid muscle; d. coracobrachialis muscle; r, r, tri-ceps; e. ?. extensors of wristand loii^ supinator of thehand; I in, flexor of fingersand radial and ulnar sides ofthe wrist, and /. palm of thehand, or palmaris longus ;p, palmaris brevis ; g, pal-mar fascia; o, bicepa. 300 ARM—AEMADILLO. the internal condyle, N, for which it has obtained tlie term funnybone, from the eJectric-like tluillwliioli passesalong the arm whentlie nerve is strucl£ or jiressed. The median, as its name implies,keeps a middle course with the artery. .In wounds of the forearm, tlie bleeding is often excessive, butmay be at once controlled by pressuie on the brachial artery, onthe inner side of the biceps. The arm affords excellent illustrations of some of the principlesof mechanics. The insertion of tlie muscles so near, as will beseen, to the fulcra or centers of motion, involves a loss of powerin the usual sense
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Keywords: ., bookcentury1800, bookdecade1880, bookidchamberssenc, bookyear1888
