Medical and surgical therapy . esions, to present similar disturbances; butthis is not so. Each mixed nerve has a very clearlydefined clinical individuality ; not only in the way itreacts to the lesion, but also in the manner in whichit recovers its functions.^ ANATOMY The musculo-spiral nerve arises from the brachial plexus in theaxilla, where it is situated posterior to the median nerve and tothe axillarj arter\. When it leaver the axilla it enters the musculo-spiral groove between the insertions of the internal and external 1 Pierre Marie and Mme. Ath. Benisty, Individualite clinique desner
Medical and surgical therapy . esions, to present similar disturbances; butthis is not so. Each mixed nerve has a very clearlydefined clinical individuality ; not only in the way itreacts to the lesion, but also in the manner in whichit recovers its functions.^ ANATOMY The musculo-spiral nerve arises from the brachial plexus in theaxilla, where it is situated posterior to the median nerve and tothe axillarj arter\. When it leaver the axilla it enters the musculo-spiral groove between the insertions of the internal and external 1 Pierre Marie and Mme. Ath. Benisty, Individualite clinique desnerfs peripheriques, Soc. de Xenrohjie. March 15, 1915. Reme neuro-logique, May-June 1915. 23 24 CLINICAL FORMS OF NERVE LESIONS heads of the triceps muscle, where it runs parallel to the superiorprofunda artery. Then it crosses the external intermuscular septumand appears on the anterior aspect of the arm in the outer bicipitalgroove at about 10 cm. above the epicondyle. Nerve to outer head and anconeus. Ulnar nerve. —M- Circumflex nerve. Musculo-spiral nerve. External cutaneous branch. Fig. 4.—Musculo-spiral nerve. At the level of, or a little below, the articulation, the nerve dividesinto two terminal branches. The anterior or sensory branch lies first of all under the supinatorlongus, and then passes dowii the anterior aspect of the supplies the outer half of the back of the hand (Sgs. 11 and 12). The posterior or tnotor branch, the larger of the two, at about2 cm. below the articulation penetrates the substance of the supinator THE MUSCULO-SPIRAL NERVE 25 breris to occupy the space between the two superficial and deepmuscular layers on the posterior aspect of the forearm. The first branch given off by the musculo-spiral nerve is the internalcutaneoi<s. It starts where the nerve enters the musculo-spiral Branch tosupinatorlongus. Jf Musculo-spiral nerve. Branch to ext. carp. rad. long. Branch to ext. carp. rad. brer. Musculo-spiral n. (posterior
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsurgery, bookyear1918
