Quadratus Plantae Anatomy

The Quadratus Plantae Origin, Insertion, Action

Origin:  Lateral head: attaches to the lateral side of the calcaneus and to the long plantar ligament
             Medial Head: attaches to the medial surface of the calcaneus
Insertion:  Attaches into the dorsal and plantar surface of the tendons of the flexor digitorum longus.
Actions:  Assists with flexion of the four small toes
Innervation:  Lateral plantar nerve (S1, S2, S3)
Blood Supply: Branches of the posterior tibial  artery

Primary Actions of the Quadratus Plantae

The quadratus plantae does not have a primary action

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Seconday Actions of the Quadratus Plantae

1. Assists flexion of the 2nd – 4th toes