Quadratus Plantae Anatomy

The Abductor Digiti Minimi Origin, Insertion, Action

Origin: Medial and lateral tubercles of the calcaneus, the plantar aponeurosis, and the intermuscular septum
Insertion:  Lateral side of the base of the proximal phalanx of the fifth toe
Actions:  Abduction of the fifth toe
Innervation:  Lateral plantar nerve (S1, S2, S3)
Blood Supply: Lateral plantar artery

Primary Actions of the Abductor Digiti Minimi

1. Abduction of the fifth toe at the metatarsophalangeal joint

Agonists: none

Antagonist: Third Plantar Interosseous

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Secondary Actions of the Abductor Digiti Minimi

2. Assists with flexion of the fifth toe at the metatarsophalangeal joint
Agonists:
  • Fexor Digitorum Brevis
  • Flexor Digitorum Longus
  • Third Plantar Interosseous

Antagonist: Extensor Digitorum Longus