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Foot Muscles/Innervations/actions ((3rd Layer (Adductor Hallucis…
Foot Muscles/Innervations/actions
2nd Layer
Quadratus Plantae
Innervation: Lateral Plantar nerve
Action: Assists flexor digitorum longus in flexing lateral four digits
Lumbricals
Innervation: (1st) Medial Nerve
Actions: Flex proximal phalanges, extend middle and distal phalanges of lateral four digits
Innervation: (remaining) Lateral Plantar nerve
3rd Layer
Adductor Hallucis
Innervation: Deep branch of Lateral Plantar nerve
Actions: Traditionally said to adduct 1st digit; assists in transverse arch of foot by metatarsals medially
Flexor Digiti Minimi Brevis
Innervation: Lateral Plantar nerve
Flexes proximal phalanx of 5th digit, thereby assisting with its flexion
Flexor Hallucis Brevis
Innervation: Medial Plantar nerve
Action: Flexes proximal phalanx of 1st digit
1st Layer
Abductor Hallucis
Innervation: Medial plantar nerve
Action:Abducts and flexes 1st digit (great toe, hallux)
Flexor Digitorum Brevis
Innervation: Medial Plantar nerve
Action: Flexes lateral four digits
Abductor Digiti Minimi
Innervation: Lateral Plantar nerve
Actions: Abducts and flexes little toe
4th layer
Dorsal Interossei
Innervation: Lateral Plantar nerve
Abducts digits 2-4 and flex metatarsophalangeal joints
Plantar Interossei
Innervation: Lateral Plantar nerve
Adducts digits 3-5 and flex metatarsophalangeal joints