Affiliation:
1. Associate Professor, Department of Anatomy, Shridevi Institute of Medical Sciences and Research Hospital, Tumkur, Karnataka, India.
2. Professor, Department of Anatomy, JJM Medical College, Davangere, Karnataka, India.
Abstract
Background: Radial nerve is the continuation of the posterior cord of the brachial plexus in the axilla. To know the mode of origin of Objectives:
branches of the radial nerve in the axilla. Dissection was done on 44 upper li Methods: mbs from embalmed adult cadavers and 6 upper limbs from
embalmed dead fetuses in the Department of Anatomy, J J M Medical College, Davangere. Dissection of Radial nerve and its branches in the axilla
was carried out according to Cunningham's manual of practical anatomy. Results: The order of origin of the branches of the radial nerve in the
axilla was posterior cutaneous nerve of arm(PCNA), nerve to long head of tricep( NLHT) and ulnar collateral nerve (UCN). Two types of common
trunks were observed. Common trunk 1 (CT1) dividing to give nerve to long head of tricep(NLHT) and ulnar collateral nerve(UCN) in 2
specimens (4%). Common trunk 2 (CT2) dividing to give nerve to long head of tricep(NLHT), ulnar collateral nerve(UCN) and posterior
cutaneous nerve of arm (PCNA) in 1 specimens (2%). The origin of Nerve to long head of triceps (NLHT) was directly from the radial nerve (RN)
in 47 specimens (94%) , through common trunk 1 (CT1) in 2 specimens (4%) and through common trunk 2 (CT2) in 1 specimens (2%). The origin
of ulnar collateral nerve (UCN) was directly from the radial nerve (RN) in 47 specimens (94%) , through common trunk 1 (CT1) in 2 specimens
(4%) and through common trunk 2 (CT2) in 1 specimens (2%). The origin of Posterior cutaneous nerve of arm(PCNA) was directly from the radial
nerve (RN) in 49 specimens (98%) and through common trunk 2 (CT2) in 1 specimens (2%). The present Interpretation and Conclusion: study
is important for Surgeons, Orthopedicians, and Neurophysicians as it provides the knowledge of mode of origin of branches of radial nerve in the
axilla.
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