. An atlas of human anatomy for students and physicians. Anatomy. 326 THE MUSCLES OE THE UPPER EXTREMITY Triceps extensor cubiti muscle (external head) M. triceps brachii (caput laterale External intermuscular septum Septum intermusculare laterale Supinator radii longus muscle M. brachioradialis External condyle Epicondylus lateralis Extensor carpi radialis longior muscle M. extensor carpi radialis longus Anconeus muscle - M. anconaeus Extensor communis digitorum muscle M. extensor digitorum communis Extensor carpi ulnaris muscle Extensor minimi digiti muscle M. extensor digiti quinti proprms
. An atlas of human anatomy for students and physicians. Anatomy. 326 THE MUSCLES OE THE UPPER EXTREMITY Triceps extensor cubiti muscle (external head) M. triceps brachii (caput laterale External intermuscular septum Septum intermusculare laterale Supinator radii longus muscle M. brachioradialis External condyle Epicondylus lateralis Extensor carpi radialis longior muscle M. extensor carpi radialis longus Anconeus muscle - M. anconaeus Extensor communis digitorum muscle M. extensor digitorum communis Extensor carpi ulnaris muscle Extensor minimi digiti muscle M. extensor digiti quinti proprms Extensor indicis muscle M. extensor indicis propnub Head of tlie ulna Capitulum uln;e Posterior annular ligament of the wrist. Brachialis anticus muscle ^M. brachialis Outer bicipital furrow Sulcus bicipitalis lateralis Biceps flexor cubiti muscle "IVI. biceps brachii Extensor carpi radialis brevior muscle M. extensor carpi radialis brevis Extensor ossis metacarpi poUicis' or abductor longus poUicis muscle M. abductor pollicis longus Extensor primi intemodii pollicis' or extensor brevis pollicis muscle RI. extensor pollicis brevis Extensor secundi intemodii pollicis' or extensor longus pollicis muscle M. extensor pollicis longus 1 have given the preference to the old names as more distinctive and therefore more suitable, of the three extensor muscles of the thumb, ejtrrcnsor OSSIS mi:/iuar/'i/'ol/ic/s, xt }i\n primi int > no iti pollicis ;iXiA. txUnsorsccundiintcriiodii pollicis. QuainC* Anatomy," loth ed.) has, however, adopted the Coiumciual n :)mencWtur<. in the case of the two latter muscles, which he terms respectively extensor brevis pollicis and exicnsor longus pollici ^\ hil t ^ et )ther names have been adopted by Macalister, who terms the extensor of the iirst phalanx, extensor pollicis minor, attd the e\len or of the st-cond phalin\ t xttnsor pollicis major. The names used in the text are, however, more familiar to students, both in England and America
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