innerbody
Diagram

Flexor Hallucis Longus Tendon

The flexor hallucis longus tendon attaches the muscle of the flexor hallucis longus to the big toe’s terminal phalanx. The flexor hallucis longus muscle is one of the hallux (plural, hallucis) muscles. It is used in flexing the largest, or big, toe and moving it to the side.