A Variation of the Musculocutaneous and the Median Nerve Anastomosis : A Case Report in Thai Cadaver

A Variation of the Musculocutaneous and the Median Nerve Anastomosis : A Case Report in Thai Cadaver


English :


This report describes a branch communicating between the musculocutaneous (MCN)
and the median nerve (MN), which was detected during routine educational dissection of the
right upper limb of a male cadaver in a gross anatomy class at Mahasarakham University
Faculty of Medicine. After piercing the coracobrachialis muscle, the MCN runs downwards
between the biceps brachii and brachialis muscles and gives branches to innervate both of these
muscles. It then descends behind the brachial artery and communicates with the MN. The
joining site we detected was located between the biceps brachii and brachialis muscles in the
lower end of the arm, near the cubital fossa. The communicating branch also gave a filament to
the pronator teres muscle. Since variations in the MCN and MN are frequent, and
communicating branches between the MCN and MN are the most common, knowledge of this
variation may help surgeons, anesthetists and neurologists to plan procedures at the arm,
forearm and elbow following trauma or other medical problems.