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This excellent monograph describes the investigation of the different forms of the brachial plexus found in 158 varieties of animals from the amphibia to man. It followed the author's desire in 1902 to trace the different components of the fifth cervical nerve in a monkey with a view to a possible nerve anastomosis operation on a young child with a localized poliomyelitic paralysis of the deltoid and spinatus muscles. There are included sections of amphibia, reptilia, aves and mammalia, the latter including thirty human plexuses. The illustrations show various brachial plexuses and attachments of shoulder muscles (especially the pectoralis major). Harris explains the cutaneous supply of the median and ulnar nerves on the back of the hand and the motor supply of the ulnar nerve to the dorsal interossei in man by finding the dorsal fibers joining the ventral branches of the inner cord and distributed with the median and
The Morphology of the Brachial Plexus with a Note on the Pectoral Muscle and Its Tendon Twist. JAMA. 1939;113(19):1762. doi:10.1001/jama.1939.02800440066043
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