Abductor hallucis muscle

The abductor hallucis muscle is a muscle located in the foot. It plays a crucial role in the movement and stabilization of the big toe, also known as the hallux.

Anatomy

The abductor hallucis muscle is situated along the medial side of the foot. It originates from the medial process of the calcaneal tuberosity, the flexor retinaculum, and the plantar aponeurosis. The muscle fibers run along the medial side of the foot and insert into the medial side of the base of the proximal phalanx of the big toe.

Function

The primary function of the abductor hallucis muscle is to abduct the big toe, moving it away from the second toe. This action is important for maintaining balance and stability during walking and running. Additionally, the muscle assists in flexing the big toe and supports the medial longitudinal arch of the foot.

Innervation

The abductor hallucis muscle is innervated by the medial plantar nerve, which is a branch of the tibial nerve.

Blood Supply

The blood supply to the abductor hallucis muscle is provided by the medial plantar artery, a branch of the posterior tibial artery.

Clinical Significance

Weakness or dysfunction of the abductor hallucis muscle can lead to conditions such as hallux valgus or flatfoot. Strengthening exercises and proper footwear can help maintain the function of this muscle and prevent such conditions.

Related pages

• Foot anatomy
• Muscles of the foot
• Medial plantar nerve
• Hallux valgus

Gallery

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  Illustration of the abductor hallucis muscle.
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  Intrinsic muscles of the foot, including the abductor hallucis.
• 
  Detailed view of the abductor hallucis muscle.
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  Muscles in the human foot, seen from below.
• 
  Anatomical diagram showing the abductor hallucis muscle.