Flexor digiti minimi brevis of foot

The flexor digiti minimi brevis (Latin: musculus flexor digiti minimi brevis) is a small fusiform-shaped muscle located in the lateral aspect of the sole of the foot. It lies under the fifth metatarsal bone and, together with the abductor digiti minimi and opponens digiti minimi muscles, belongs to the lateral compartment of the plantar foot muscles. The flexor digiti minimi brevis acts on the little toe.

Origin

The flexor digiti minimi brevis of the foot originates from the base of the fifth metatarsal bone and the long plantar ligament.

Insertion

The flexor digiti minimi brevis of the foot inserts on the base of the proximal phalanx of the fifth finger of the foot.

Action

The flexor digiti minimi brevis of the foot provides flexion of the fifth toe at the fifth metatarsophalangeal joint.

Innervation

The flexor digiti minimi brevis of the foot is innervated by the lateral plantar nerve (S2 - S3) - a terminal branch of the tibial nerve.

Blood supply

The flexor digiti minimi brevis of the foot receives arterial blood supply from the branches of the lateral plantar artery that arises from the posterior tibial artery.