In the palm of the hand the median nerve is covered by the skin and the palmar aponeurosis, and rests on the tendons of the Flexor muscles. Immediately after.
With the use of a stereoscopic microscope, observations were made on the course of the proper digital nerve of the thumb on ten upper limbs in adult cadavers.
Trigger thumb is ten times more common than trigger finger in infants. It presents at two years of age and is secondary to a mismatch in the flexor pollicis longus.