Human anatomy, including structure and development and practical considerations . f tiie extensor car-pi utnaris, the extensorcommunis digitorutn,the extensor minimi digiti, the tliree extensors of t/ie thumb and the extensor indicis. The first three of these muscles are sui^plied by a branch whicli leaves the posterior inter-osseous soon after its emergence from the supinator lirevis. This nerve divides into twobranches, one of which is distributed to the carpi ulnaris and the other to the remain-ing two muscles. The communis digitorum receives additional innervation from
Human anatomy, including structure and development and practical considerations . f tiie extensor car-pi utnaris, the extensorcommunis digitorutn,the extensor minimi digiti, the tliree extensors of t/ie thumb and the extensor indicis. The first three of these muscles are sui^plied by a branch whicli leaves the posterior inter-osseous soon after its emergence from the supinator lirevis. This nerve divides into twobranches, one of which is distributed to the carpi ulnaris and the other to the remain-ing two muscles. The communis digitorum receives additional innervation from a twigwhich arises from the posterior interosseous further down the forearm. Superficial dissection of right arm,anterior surface ; cephalic vein is seen showing cutaneous nerves of passiii), up to del to-pectoral interval; basilic vein pierces deep fascia at lower inner aspect of arm. THE BRACHIAL ILHXIS. 1313 Inf. fxt. c\itaneous hr. of imisculo- spiral nerves Musculo-cnta-neoiis nerve, ant-cutaneous br. Musculo-cuta- neous nerve, jx>st, cutaneous br Dirftal median. internalcutaneous nerve Internal cutaneousnerve Ant. br. internalcutaneous nerve The ossis inctacarf>i polliiis and tlie extensor hrcvis pollicis are innervated by abranch arising below the iireceding. which breaks up into two decurrent twigs, one of whichgoes to each muscle. The extensor lont^us pollicis is the recipient of a small filament, which arises from theposterior interosseous a short tlistance below the preceding nerve. The extensor indicis is su|>plied by the lowermost motor Ii(.. i iu4. filament arising from the poste-rior interosseous. Terminal twigs are distrib-utetl to tile dorsal portion of thewrist joint, the intercarjial andcarpo-metacarpal joints, the peri-osteum of the radius and ulnaand the of the filaments sujiplyingthe last-mentioned structure fre-<iuently inosculates with a branchfrom the anterior interosseous. The filaments
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
