Lower limb

Oblique head of adductor hallucis

Musculus adductor hallucis, caput obliquum

Origin

Base of metatarsals 2-4, cuboid bone and lateral cuneiform bone

Insertion

Lateral sesamoid bone and base of the proximal phalanx of the great toe (together with the transverse head)

Function

Adduction and flexion of the MTP joint of the great toe; supports the transverse arch of the foot

Innervation

Deep branch of the lateral plantar nerve

Movement & chain

Works together with the transverse head of adductor hallucis to stabilize the forefoot and the transverse arch of the foot during push-off.

Palpation

Deep in the central plantar midfoot along the bases of metatarsals II–IV; not superficially palpable.

Clinical

Maintains the transverse metatarsal arch; lateral pull on the proximal phalanx contributes to progressive hallux valgus deformity.

Segmental innervation

S2-S3, via the deep branch of the lateral plantar nerve.

In clinical practice

Diabetic foot inspection and pressure ulcer prevention; monitor for friction points from footwear or bedding and ensure correct anti-embolism stocking fit.

Region in the model

Lower limb