Flexor Hallucis Brevis

The flexor hallucis brevis is an intrinsic muscle of the foot. It is located within the third plantar muscle layer of the foot and has two heads of origin.

• Attachments:
  • Lateral head – originates from the plantar surfaces of the cuboid and lateral cuneiforms
  • Medial head – originates from the tendon of the posterior tibialis tendon.
  • The fibres converge into a single muscle belly, which attaches to the base of the proximal phalanx of the great toe.
• Actions: Flexion of the great toe at the metatarsophalangeal joint.
• Innervation: Medial plantar nerve.
• Blood Supply: Posterior tibial and fibular arteries.

By TeachMeSeries Ltd (2025)

Fig 4
The third layer of plantar muscles.