Illustrated Encyclopedia of Human Anatomic Variation: Opus III: Nervous System
Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed
Apparent abnormality of the brachial plexus produced by its
connective tissue wrapping (solid lines); the medial and posterior
cords appeared to form a common trunk. The broken lines indicate that
proper dissection of the connective tissue, without interrupting
nerve fibers, resolved the plexus into a normal one. 1 is the upper
trunk, dissectible into anterior and posterior elements; 2, the
posterior division of the lower trunk; 3 is the lateral cord; 4 the
radial nerve dissectible from the axillary nerve, 5; 6 is the medial
cord, 7 the musculocutaneous nerve, 8 the ulnar nerve, and 9 the
median nerve.
From Walsh, J. F.: Am. J. Med. Sci. 74:387 :1877.
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