Actions of Intrinsic Muscles of the Foot

Extensor Digitorum Brevis

Extension at metatarsophalangeal joints of toes 1–4

Abductor Hallucis

Abduction at metatarsophalangeal joint of great toe

Flexor Digitorum Brevis

Flexion of proximal interphalangeal joints of toes 2–5

Quadratus Plantae

Flexion at joints of toes 2–5

Lumbricals (4)

Flexion at metatarsophalangeal joints; extension at interphalangeal joints of toes 2–5

Flexor Hallucis Brevis

Flexion at metatarsophalangeal joint of great toe

Flexor Digit Minimi Brevis

Flexion at metatarsophalangeal joint of toe 5

Abductor Digiti Minimi

Abduction and flexion at metatarsophalangeal joint of toe 5

Dorsal Interossei (4)

Abduction at metatarsophalangeal joints of toes 3 and 4; flexion of metatarsophalangeal joints and extension at the interphalangeal joints of toes 2 through 4

Adductor Hallucis

Adduction and flexion at metatarsophalangeal joint of great toe

Plantar Interossei (3) 

Adduction of metatarsophalangeal joints of toes 3–5; flexion of metatarsophalangeal joints and extension at interphalangeal joints