Correspondence Address :
Department of Pathology Anatomy and Cell Biology
Thomas Jefferson University
Philadelphia PA. 19050.
Received on: December 03, 2020, Accepted on: January 03, 2021, Published on: January 19, 2021
Citation: Olutayo Ariyo (2021). A Rare Formation of Lateral Cutaneous Nerve of the Forearm and its Clinical Significance in Anesthesiology
Copyright: 2021 Olutayo Ariyo. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Block duration, faster onset time of sensory and motor block, improved success rates are important in anesthesiology and may be affected if there is poor knowledge anatomic component of intended nerve to be blocked, most especially in variants of such nerves due to contributions from adjacent nerves. The lateral cutaneous nerve of the forearm being reported is a variant of the norm, as there is a communication from the median nerve joining distal to the musculocutaneous nerve had given off all its muscular branches to the arm flexor muscles.
The musculocutaneous nerve is derived from the lateral cord of the brachial plexus, the nerve becoming the lateral cutaneous nerve of forearm after leaving the axillary sheath at the level of the neck of humerus. The typical lateral cutaneous nerve of the forearm usually is exclusively a continuation of the musculocutaneous nerve. We report this rare formation of the lateral cutaneous nerve of forearm formed by 2 heads, a lateral head contributed by the musculocataneous nerve and the medial one by the median nerve. This variant nerve was encountered in the right limb of a 70 year- old male cadaver during routine academic dissection.
Knowledge of branching patterns and formations of the brachial plexus nerves are important to trauma surgeons during reparative surgery and to anesthesiologists for improved success rates, with concomitant usage of minimal anesthetic agent during nerve blocks.