Ultrasound median nerve movement in sagittal view

This is a sagittal view of the median nerve at the wrist (proximal is to the left) with a normal subject flexing and extending the fingers. Note that the flexor digitorum superficialis (FDS) and flexor digitorum profundus (FDP) tendons and the median nerve (N) all move in the same directions, but that the tendons show greater excursions during these movements.