The muscle selected for the experiment was the flexor carpi radialis.
The extensor carpi radialis longus muscle is inserted on the dorsal surface and the flexor carpi radialis muscle on the volar surface of the base.
Technique for transferring the m. extensor carpi radialis longus: the m. extensor carpi radialis longus tendon is divided at its insertion on the second metacarpal.
At the carpal joints longus acts in dorsiflexion with the extensor carpi ulnaris and in radial abduction with the flexor carpi radialis.
Small arteries beginning from arteria radialis downwards to the periphery have smooth muscles in order to open (vasodilation) and close (vasoconstriction).
To restore independent flexion of the index finger could be performed by using the pronator teres or extensor carpi radialis ulnaris tendon muscle units.
It will also allow the transfer of the other muscles crossing the elbow joint (like the m. brachioradialis and m. extensor carpi radialis longus).
A common site of occurrence is along the extensor carpi radialis brevis as it passes over the dorsum of the wrist joint.
