flexor hallucis longus

Also found in: Acronyms.

flexor hallucis longus

the muscle that flexes the great toe. It is particularly active during the toe-off phase of walking when the body is propelled forward of the stance leg and the great toe is the last part of the foot to leave the ground. It can also contribute to plantarflexion of the foot at the ankle joint. It is innervated by the tibial nerve.

flexor hallucis longus

; FHL extrinsic foot muscle, within deep compartment of lower-leg posterior muscle group
  • origin from posterior part of fibula distal to origin of soleus; its tendon runs obliquely down lower leg passing behind medial malleolus, under sustentaculum tali and thence into third layer of sole of foot

  • insertion into plantar aspect of distal phalanx of hallux

  • nerve supply tibial nerve

  • action flexion of metatarsophalangeal and interphalangeal joints of the hallux; assisting ankle plantarflexion, especially at toe off, and during running

References in periodicals archive ?
Tendinitis of the flexor hallucis longus and posterior impingement of the ankle are familiar to the orthopedic surgeon who treats professional dancers.
The posterior tibialis enables the foot to turn inward at the ankle and the flexor hallucis longus controls flexion or downward motion of the big toe.
Because of its location between the medial and lateral talar tubercles, inflammatory changes may be seen in the flexor hallucis longus tendon in patients with os trigonum syndrome.
Anatomically designed to match the shape of the proximal phalanx, the K2 Hemi includes a slight groove in the base to accommodate the flexor hallucis longus (FHL) tendon.
The flexor hallucis longus (FHL) tendon is prone to tendinosis and tears at the knot of Henry.

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