Lumbricals: Origin, Insertion, Action & Nerve Supply

Lumbricals: The lumbricals are four small skeletal muscles in the foot. They are each located medial to their corresponding tendon of the flexor digitorum longus muscle.

Origin: Originates from the tendons of flexor digitorum longus.
Insertion: Attaches to the extensor hoods of the lateral four digits( Dorsal extensor expansion).

Function: Extend toes at interphalangeal joints and flex metatarsal-phalangeal joints

Nerve Supply: The most medial lumbrical is innervated by the medial plantar nerve(L4,5). The remaining three lumbrical muscles are innervated by the lateral plantar nerve(S2,3).

Muscles of the Lower Limb

Leg Muscles
Thigh Muscles
Foot Muscles