Abductor Hallucis Anatomy

The Abductor Hallucis Origin, Insertion, Action

Origin:  Flexor retinaculum, the medial process of the calcaneal tuberosity, the plantar aponeurosis, and the intermuscular septum between it and flexor digitorum brevis
Insertion:  Medial side of the base of the proximal phalanx of the great toe, with some of its fibers attaching more proximally to the medial sesamoid bone
Actions:  Assists with flexion of the four small toes
Innervation:  Medial plantar nerve (S1, S2)
Blood Supply: Lateral plantar artery from the posterior tibial artery

Primary Actions of the Abductor Hallucis

1. Abduction of the great toe at the metatarsophalangeal joint

  • Agonists: None
  • Antagonists: Adductor Hallucis

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Secondary Actions of the Abductor Hallucis

1. Assists with flexion of the great toe at the metatarsophalangeal joint

Agonists:

  • Flexor Hallucis Brevis
  • Flexor Hallucis Longus
  • Adductor Hallucis

Antagonists: 

  • Extensor Hallucis Longus
  • Extensor Hallucis Brevis