- Discussion:
- most common pattern of motor branch of median nerve is extraligamentous take off from main branch of
median nerve (distal to
TCL in 50% pts)
- in 30% of pts motor branch exits proximal to TLC;
- in 20% of pts motor branch exits distal to
TLC;
- motor branch of median nerve in hand arises under or just distal to flexor retinaculum, & winds around distal border of retinaculum to reach
thenar muscles and the lateral 2 lumbricals;
- numerous variations in the branching have been described;
- sensory branches innervate lateral three & 1/2 digits & palm of hand;
- found at Kaplan's line which is intersection of line extending vertically from first web space and line formed from the radial origin of first web
space connecting to hook of
hamate;
Transligamentous motor branch of the median nerve discovered during endoscopically assisted carpal tunnel release.
Anatomy of the thenar branch of the median nerve.
Correlation Between Muscle Morphology of the Transverse Carpal Ligament and Branching Pattern of the Motor Branch of Median Nerve
