Fibularis Longus
Leg & Ankle
Its tendon crosses the entire sole of the foot — a key player in maintaining your foot arches.
Function
Everts foot, plantarflexes ankle, supports transverse arch
Origin
Head and upper 2/3 of lateral fibula
Insertion
Base of 1st metatarsal and medial cuneiform (plantar surface)
Innervation
Superficial fibular nerve (L5-S2)