Flexor Hallucis Brevis, Medial View

Description

Seen from the medial aspect of a male foot, the flexor hallucis brevis lies on the plantar side of the first metatarsal and first metatarsophalangeal (MTP) joint, deep to the plantar aponeurosis and adjacent to the medial head of the flexor hallucis longus tendon as it courses toward the hallux. Its two heads straddle the plantar surface of the first metatarsal and converge distally toward the base of the proximal phalanx, where the sesamoid complex sits embedded within the tendon slips. Proximal landmarks include the talus and calcaneus at the ankle and hindfoot, with the medial column bones aligned distally through the first metatarsal to the phalanges. Articular cartilage is indicated at the tibiotalar joint and along the MTP and interphalangeal joints. Deep and compact. A medial angle is the clearest way to appreciate how the flexor hallucis brevis stabilizes the first MTP joint during toe-off, working with the sesamoids to redirect force and reduce tendon friction while the hallux flexes. That relationship becomes clinically concrete in sesamoiditis, turf toe, and hallux rigidus, where altered first-ray mechanics and plantar plate pathology change load across the sesamoid apparatus and can irritate the flexor hallucis brevis insertion. Surgical planning for sesamoid excision or plantar plate repair also benefits from seeing how close the muscle bellies and tendon slips sit to the plantar aspect of the first metatarsal head. Use this artwork in lower-limb anatomy teaching for podiatry, orthopaedics, and physical therapy curricula, or in biomechanics chapters covering gait and forefoot loading at the first MTP joint. It also fits operative technique manuals and patient-facing education on hallux pain that needs clear medial-column context. Anatomical accuracy verified by SciePro's Medical Advisory Board.