Author: Dr Peter de Souza
Last modified: 18 November 2022

The abductor digiti minimi is one of the intrinsic muscles within the first layer of the plantar muscles of the foot.

The intrinsic muscles of the foot consist of one intrinsic muscle on the dorsal aspect of the foot (the extensor digitorum brevis), and 4 layers of muscles on the plantar aspect of the foot:

  • 1st layer: abductor hallucis, flexor digitorum brevis, abductor digiti minimi
  • 2nd layer: quadratus plantae, lumbricals
  • 3rd layer: flexor hallucis brevis, adductor hallucis, flexor digiti minimi brevis
  • 4th layer: dorsal interosseri, plantar interossei

Origin

  • Lateral and medial processes calcaneal tuberosity
  • Plantar aponeurosis

Insertion

  •  Lateral base of proximal phalanx of little toe

Action

  • Abducts little toe at the metatarsophalangeal joint

Innervation

  • Medial plantar nerve from tibial nerve: S2,S3

Blood Supply

  •  Lateral plantar artery