Flexor hallucis longus

  • The flexor hallucis longus (also flexor hallucis longus muscle, latin: musculus flexor hallucis longus) is a deep muscle belonging to the posterior group of the lower leg muscles.

    The flexor hallucis longus originates from the posterior surface of the body of the fibula and from the interosseous membrane. The flexor hallucis longus inserts at the distal phalanx of the hallux (or big toe).

    The flexor hallucis longus has many functions, including flexion, supination and adduction of the foot, and also flexion of the big toe.