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Flexor Hallucis Brevis Origin, Insertion, Action, Agonist

Image of skeletal foot showing the origin and insertion of the flexor hallucis brevis.

Origin: Tibialis posterior tendon, medial and lateral cuneiform bones, cuboid bone

Insertion: The medial and lateral side of the base of the first phalanx of the great toe.

Actions: Flexion of the great toe at the metatarsophalangeal joint

Innervation: Medial plantar nerve (S1, S2)

Blood Supply: Branches from the posterior tibial artery


If you are looking for pain and symptoms information, please visit the Flexor Hallucis Brevis pain page

Primary Actions of the Flexor Hallucis Brevis Muscle

1. Flexion of the great toe at the metatarsophalangeal joint

Agonists: Flexor Hallucis Longus


    • Extensor Hallucis Longus
    • Extensor Hallucis Brevis

2. Supports the medial longitudinal arch of the foot



Clay, J. H., Allen, L., Pounds, D. (2015). Clay & Pounds' Basic Clinical Massage Therapy: Integrating Anatomy and Treatment (3rd ed.). Philadelphia, PA: Lippincott Williams & Wilkins

Netter, F. (2014). Atlas of Human Anatomy (6th ed.). Philadelphia, PA: Saunders.

Muscolino, J., (2016) Kinesiology: The Skeletal System and Muscle Function (3rd ed.). Maryland Heights, Missouri: Mosby.

Image Credits: Dreamstime