Pronunciation (LUM-bri-culs) digitorum longus Origin/Proximal Attachment From tendons of Flexor Insertion/Distal Attachment Medial sides of proximal phalanges of toes 2 – 5 & extensor expansions & tendons of extensor digitorum longus on dorsum of foot Action/Relevance Flexes the proximal phalanges (at the MTP joint) Extends the middle & distal phalanges (at the IP joints) Innervation 1st: Medial plantar nerve (L5, S1) 2nd-4th: Lateral plantar nerve (S1, 2) | 
