Flexor Hallucis Longus Muscle
Origin: Distal two-thirds of the posterior surfaces of the fibula, the adjacent interosseus membrane, the posterior intermuscular septum, and the lateral part of the fascia covering tibialis posterior
Insertion: Plantar aspect of the base of the distal phalanx of the great toe after traveling between the two sesamoids associated with the first metatarsal head
Actions: Flexion of the great toe
Innervation: Tibial nerve (L5, S1, S2 )
Blood Supply: Branches from the posterior tibial artery
Primary Actions of the Flexor Hallucis Longus
1. Flexion of the great toe at the interphalangeal joint
Agonists:
- None
Antagonists:
- Extensor Hallucis Longus
2. Flexion of the great toe at the metatarsophalangeal joint
Agonists:
- Flexor Hallucis Brevis
Antagonists:
- Extensor Hallucis Longus
- Extensor Hallucis Brevis
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Secondary Actions of the Flexor Hallucis Longus
1. Assists with plantarflexion of the foot at the ankle
Agonists:
- Gastrocnemius
- Soleus
Antagonists:
- Tibialis Anterior
Muscle Pain Information: The flexor hallucis longus contributes to pain in the bottom of the big toe.
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For intermediary anatomy students learning skeletal and muscle structure.
For beginning and intermediary anatomy . Muscle overlays on the human body. Excellent visuals!
