LEVEL I MUSCLE CHART Use this chart as a guide for ... - Kinetacore

L4-S3secondaryaspera on posterior aspect of femoral shaftto lateral aspect of fibular head.Lower ExtremityMuscle Action Innervation AttachmentsGastrocnemiusSoleusAnteriorTibialisPlantarflexion ofankle and flexion ofthe kneePlantarflexion ofankle jt andeccentric control ofdorsiflexionDorsiflexion andinversion of the footS1-2 Medial head to upper aspect of the posteriorfemoral condyle, popliteal surface of femurand capsule of knee joint. Lateral head tolat. fem. condyle and underlying capsule ofknee joint both joining at the Achillestendon.S1-2 Post. surface of the head and upper third ofthe fibular shaft. Soleal line of the tibia andmiddle third of the medial border of thetibial shaft.L4-5 Inf. surface of lateral condyle of tibia. Upper2/3rds of lat. tibial shaft, ant. surface ofinterosseous membrane to the extensorretinaculae onto medial surface of the medialcuneiform and medial aspect of the base ofthe 1 st metatarsal bone.PeroneusLongusEversion of thefoot, plantar flexionof ankle and supportof archL5-S1Lateral surface of head of fibula, upper2/3rds of lat. fibular shaft and ant. and post.intermuscular septa of leg behind lat.malleolus deep to lat. surface of calcaneus.Peroneus Brevis Eversion of foot,plantarflexion ofankle andstabilization ofsubtalar andmidtarsal jointsL5-S1Distal 2/3rds of lat. surface of shaft offibula. Adjoining anterior and posteriorintermuscular septa to styloid process on thelateral aspect of the base of 5 th metatarsal.Ext. DigitorumExtension of lateralfour toes atinterphalangeal andMTP joints, assistsin DF of ankleL4-S1Inf. aspect of lateral tibial condyle, upper3/4ths of med. surface of fibula, ant. surfaceof interosseous membrane, ant.intermuscular septum and overlying deepfascia to the dorsal aspects of the middleand distal phalanges of corresponding toesvia dorsal digital expansions.