lower leg

• O -Medial head-posterior surface of distal femur just superior to medial condyle;
• -Lateral head-upper posterolateral surface of lateral femoral condyle

I -Via calcaneal tendon, to posterior surface of calcaneus

In -Tibial nerve [S1, S2]

F -Plantarflexes foot and flexes knee

O -Inferior part of lateral supracondylar line of femur and oblique popliteal ligament of knee

I -Via calcaneal tendon, to posterior surface of calcaneus

In -Tibial nerve [S1, S2]

F -Plantarflexes foot and flexes knee

O -Soleal line and medial border of tibia; posterior aspect of fibular head and adjacent surfaces of neck and proximal shaft; tendinous arch between tibial and fibular attachments

I -Via calcaneal tendon, to posterior surface of calcaneus

In -Tibial nerve [S1, S2]

F -Plantarflexes the foot

O -Lateral femoral condyle

I -Posterior surface of proximal tibia

In -Tibial nerve [L4-S1]

• F -Stabilizes knee joint (resists lateral rotation of tibia on femur)
• - Unlocks knee joint (laterally rotates femur on fixed tibia)

O -Posterior surface of fibula and adjacent interosseous membrane

I -Plantar surface of distal phalanx of great toe

In -Tibial nerve [S2, S3]

F -Flexes great toe

O -Medial side of posterior surface of the tibia

I -Plantar surfaces of bases of distal phalanges of the lateral four toes

In -Tibial nerve [S2, S3]

F -Flexes lateral four toes

O -Posterior surfaces of interosseous membrane and adjacent regions of tibia and fibula

I -Mainly to tuberosity of navicular and adjacent region of medial cuneiform

In -Tibial nerve [L4, L5]

F -Inversion and plantarflexion of foot; support of medial arch of foot during walking

O -Upper lateral surface of fibula, head of fibula, and occasionally the lateral tibial condyle

I -Undersurface of lateral sides of distal end of medial cuneiform and base of metatarsal I

In -Superficial fibular nerve [L5, S1, S2]

F -Eversion and plantarflexion of foot; supports arches of foot

O -Lateral surface of tibia and adjacent interosseous membrane

I -Medial and inferior surfaces of medial cuneiform and adjacent surfaces on base of metatarsal I

In -Deep fibular nerve [L4, L5]

F -Dorsiflexion of foot at ankle joint; inversion of foot; dynamic support of medial arch of foot

O -Lower two-thirds of lateral surface of shaft of fibula

I -Lateral tubercle at base of metatarsal V

In -Superficial fibular nerve [L5, S1, S2]

F -Eversion of foot

O -Middle one-half of medial surface of fibula and adjacent surface of interosseous membrane

I -Dorsal surface of base of distal phalanx of great toe

In -Deep fibular nerve [L5, S1]

F -Extension of great toe and dorsiflexion of foot

O -Distal part of medial surface of fibula

I -Dorsomedial surface of base of metatarsal V

In -Deep fibular nerve [L5, S1]

F -Dorsiflexion and eversion of foot

O -Proximal one-half of medial surface of fibula and related surface of lateral tibial condyle

I -Via dorsal digital expansions into bases of distal and middle phalanges of lateral four toes

In -Deep fibular nerve [L5, S1]

F -Extension of lateral four toes and dorsiflexion of foot