Foot eversion is caused by (FMGE Dec 2018)
Also known as FIBULARIS LONGUS. It is muscle of lateral compament of leg. ORIGIN: Upper 2/3rd of lateral surface of fibula, head of fibula & occasionally lateral tibial condyle. INSEION: Undersurface of lateral sides of distal end of medial cuneiform & base of metatarsal I. INNERVATION: Superficial fibular nerve (L5, S1, s2) Function: eversion & plantar flexion of foot, suppo arches of foot. Muscle Origin Inseion Innervation Function a) extensor digitorum longus | anterior compament of leg. Proximal 1/2 of medial surface of fibula & related surface of lateral tibial condyle. Via dorsal digital expansions into bases of distal & middle phalanges of lateral 4 toes. Deep fibular nerve (L5, S1) Extension of lateral 4 toes & dorsiflexion of foot b) tibialis anterior | anterior compament. Lateral surface of tibia & adjacent interosseous membrane. Medial & inferior surface of medial cuneiform & adjacent surface on base of metatarsal I. Deep fibular nerve (L4, L5) Dorsiflexion of foot at ankle joint, inversion of foot, dynamic suppo of medial arch of foot c) tibialis posterior | posterior compament of leg Posterior surfaces of interosseous membrane & adjacent regions of tibia & fibula Mainly to tuberosity of navicular & adjacent region of medial cuneiform Tibial nerve (L4, L5) Inversion & plantar flexion of foot, suppo medial arch of foot while walking.
Extensor digitorum
Peroneus longus
Tibialis anterior
Tibialis posterior
FMGE 2018