- See: Plantar Muscles of the Foot:
Origin: between the tendons of the flexor digitorum longus, except the1st, which arises from the middle side of the first tendon of
the flexor digitorum longus;
Insertion: on the medial side of the proximal phalanx, into the expansions of the tendons to the extensor digitorum longus of the
2nd to 5th toes.
Action: Flex the proximal phalanges on the metatarsals and extend the 2 distal phalanges of the 2nd to 5th toes.
Nerve Supply: 1st lumbricale: medial plantar, L4, L5; 2nd, 3rd, 4th lumbricales: lateral plantar, S1, S2; (See innerv. misc. lower limb)
- flexor digitorum brevis and longus for the metatarsophalangeal articulation,
- extensor digitorum longus and brevis for the extensor function;
- dorsal interossei and plantar interossei