Abstract
Median nerve anatomy is of great interest to clinicians and scientists given the importance
of this nerve and its association with diseases. A rare anatomical variant of the
median nerve in the distal forearm and wrist was discovered during a cadaveric dissection.
The median nerve was deep to the flexor digitorum superficialis (FDS) in the carpal
tunnel. It underwent a 360-degree spin before emerging at the lateral edge of FDS.
The recurrent motor branch moved from medial to lateral on the deep surface of the
median nerve, as it approached the distal carpal tunnel. This variant doesn't fall
into any of Lanz's four groups of median nerve anomalies. We propose a fifth group
that involves variations in the course of the median nerve. This report underscores
the importance of recognizing variants of the median nerve anatomy in the forearm
and wrist during surgical interventions, such as for carpal tunnel syndrome.
Keywords
anatomy - carpal tunnel - flexor digitorum superficialis - median nerve - variants
