Anatom3DSuperficial branch of radial nerve
Ramus superficialis nervi radialis · Povrchová větev vřetenního nervu
Nervous system
Looks like
The sensory branch of the radial nerve running under brachioradialis and surfacing above the wrist on the thumb side.
What it does
Brings feeling from the back of the thumb side of the hand.
Keeping it well
Tight watches, handcuffs or wrist surgery can pinch it (Wartenberg syndrome), causing burning on the back of the thumb.