At the upper border of the pronator quadratus muscle it pierces the interosseous membrane and reaches the back of the forearm, where it anastomoses with the dorsal interosseous artery.
When buying athletic footwear it has been important to determine whether one was a pronator, overpronator or oversupinator, also called an underpronator.
To restore independent flexion of the index finger could be performed by using the pronator teres or extensor carpi radialis ulnaris tendon muscle units.