Iliacus

Front 1

Vastus Lateralis(externus) Muscle

Back 1

Origin: intertrochanteric line, anterior and inferior borders of the greater trochanter, gluteal tuberosity, upper half of the linea aspera, and entire lateral intermuscular septum
insertion: lateral border of the patella and patellar tendon to the tibial tuberosity
Action: Extension of the knee
Innervation: Femoral nerve(L2-L4)

Front 2

Vastus intermedius muscle

Back 2

Origin: Upper 2/3 of the anterior surface of the femur
Insertion: Upper border of the patella and patellar tendon to the tibial tubersoity
Action: Extension of the knee
Innervation: Femoral nerve(L2-L4)

Front 3

Vastus Medialis (internus) Muscle

Back 3

Origin: Whole lenght of the linea aspera and the medial condyloid ridge
Insertion: Medail half of the upper border of the patella and patellar tendon too the tibial tuberosity
Action: Extension of the knee
Innervation: femoral nerve(L2-L4)

Front 4

Popliteus Muscle

Back 4

Origin: Posterior surface of the lateral condyle of the femur
Insertion: Upper posterior medial surface of the tibia
Action: flexion of the knee, Internal rotation of the knee as it flexes
Innervation: Tibial nerve(L5, S1)

Front 5

Gastrocnemius muscle

Back 5

Origin: Medial Head(Posterior surface of the medial femoral condyle) Lateral Head:(Posterior surface of the lateral femoral condyle)
Insertion: Posterior surface of the calcaneus( Achilles tendon)
Action: Plantar flexion of the ankle, Flexion of the knee
Innervation: Tibial nerve(S1,S2)

Front 6

Soleus Muscle

Back 6

Origin: Posterior surface of the proximal fibula and proximal 2/3 of the posterior tibial surface
Insertion: Posterior surface of the calcaneus(Achilles tendon)
Action: Plantar flexion of the ankle
Innervation: Tibial nerve ( S1,S2)

Front 7

Peroneus(fibularis) longus muscle

Back 7

Origin: Head and upper 2/3 of the lateral surface of the fibula
Insertion: Undersurfaces of the medial cuneiform and first metatarsal bones
Action: Eversion of the foot, Plantar flexion of the ankle
Innervation: Superficial peroneal nerve( L4,L5,S1)

Front 8

Peroneus (fibularis) Brevis

Back 8

Origin: Mid to lower 2/3 of the lateral surface of the fibula
Insertion: Tuberosity of the fifth metatarsal
Action: Eversion of the foot, Plantar flexion of the ankle
Innervation: Superficial personeal nerve (L4,L5,S1)

Front 9

Peroneus (fibularis) Tertius

Back 9

Origin: Distal third of the fibula
Insertion: superior aspect of the base of the fifth metatarsal
Action: Eversion of the foot, dorsiflexion
Innervation: Deep peroneal nerve(L4,L5,S1)

Front 10

Extensor digitorum longus muscle

Back 10

Origin: Lateral condyle pf the tibia, head of the fibula, and upper 2/3 of the anterior surface of the fibula
Insertion: Tops of the middle and distal phalanxes of the four lesser toes
Action: Extension of the four lesser toes at the metatarsophalangeal and the proximal and distal interphalangeal joints, dorsiflexion of the ankle, eversion of the foot
Innervation: Deep peroneal nerve(L4,L5,S1)

Front 11

Extensor hallucis longus muscle

Back 11

Origin: Middle 2/3 of the medial surface of the anterior fibula
Insertion: Top of the base of the distal phalanx of the great toe
Action: Dorsiflexion of the ankle, Extension of the great toe at the metatarsophalangeal and interphalangeal joints, weak inversion of the foot
Innervation: Deep peroneal nerve (L4,L5,S1)

Front 12

Tibialis anterior muscle

Back 12

Origin: upper 2/3 of the lateral surface of the tibia
Insertion: Inner surface of the medial cuneiform and the base of the first metatarsal bone
Action: Dorsflexion of the ankle, inversion of the foot
Innervaiton: Deep personeal nerve( L4,L5,S1)

Front 13

Tibialis posterior muscle

Back 13

Origin: Posterior surface of the upper half of the interosseus membrane and adjacent surfaces of the tibia and fibula
Insertion: inferior surfaces of the navicular, cuneiform, and cuboid bones and bases of the second, third, and fourth metatarsal bones
Action: Plantar flexion of the ankle, inversion of the foot
Innervation: Tibial nerve(L5,S1)

Front 14

Flexor digitorum longus muscle

Back 14

Origin: Middle third of the posterior surface of the tibia
Insertion: Base of the distal phalanx of each of the four lesser toes
Action: flexion of the four lesser toes at the metatarsophlangeal and the proximal and distal interphalangeal joints, inversion of the foot, and plantar flexion of the ankle
Innervation: Tibial nerve(L5,S1)