Flexor Hallucis Brevis

Joe Muscolino

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The flexor hallucis brevis of the foot on the right side of the body.

The Flexor Hallucis Brevis is an intrinsic muscle of the foot located in Plantar Layer III. The muscles located in Plantar Layer III are:


The flexor hallucis brevis can be considered to have two heads: Medial Head and Lateral Head.



  • Tarsals to the big toe (toe #1).
    • The proximal attachment is onto the cuboid and the third cuneiform.
    • The distal attachment is onto the medial and lateral sides of the plantar surface of the base of the proximal phalanx of the big toe.



  • Flexes the big toe at the metatarsophalangeal joint.


NOTE: The flexor hallucis brevis has a sesamoid bone in each of its two (medial and lateral) distal tendons.