Sartorius

O: Anterior Superior Iliac Spine

I: Medial aspect of proximal tibia.

A: Flexes, abducts and laterally rotates the hip; flexes the knee.

Iliacus (Iliopsoas)

O: Iliac fossa

I: Lesser trochanter of femur.

A: Flexes hip (PM).

Psoas Major (Iliopsoas)

O: T12-L5 (Transverse processes, bodies and intervertebral discs.)

I: Lesser trochanter

A: Flexor of thigh (PM). Lateral flexion of vertebral column.

Rectus Femoris

O: Anterior Inferior Iliac Spine

I: Patella and tibial tuberosity via the patellar ligament.

A: Extends knee; flexes hip.

Vastus Lateralis

O: Greater trochanter, intertrochanteric line and Linea aspera.

I: Patella and tibial tuberosity via the patellar ligament.

A: Extends and stabilizes knee.

Vastus Medialis

O: Lesser trochanter, intertrochanteric line and Linea aspera.

I: Patella and tibial tuberosity via the patellar ligament.

A: Extends and stabilizes the knee.

Tensor Fascia Lata

O: Anterior of iliac crest; ASIS.

I: Iliotibial band

A: Synergist to iliopsoas and gluteal muscles in hip (Flexion and Extension).

Pectineus

O: Superior Ramus of Pubis

I: Inferior of lesser trochanter to Linea Aspera.

A: Adduction and flexion of the hip; medial rotation.

Adductor Longus

O: Pubis (near Pubic Symphysis).

I: Linea Aspera

A: Adducts, flexes and medially rotates hip.

Gracilis

O: Inferior Ramus of Pubis

I: Medial surface of tibia (inferior to medial condyle).

A: Adducts, flexes and medially rotates thigh; flexes knee.

Adductor Brevis

O: Inferior Ramus of Pubis

I: Linea Asper

A: Adducts and medially rotates thigh.

Adductor Magnus

O: Inferior Ramus of Pubis, Ischium and Ischial Tuberosity

I: Linea Aspera

A: Adducts, medially rotates and flexes thigh; synergist to hamstrings.

Vastus Intermedius

O: Anterior and lateral surface of femur.

I: Patella and tibial tuberosity via the patellar ligament.

A: Extends and stabilizes knee.

Gluteus Maximus

O: Iliac crest, Posterior Superior Iliac Spine, Sacrum and Coccyx

I: Iliotibial band and gluteal tuberosity of femur.

A: Extension, lateral rotation and abduction of the thigh.

Biceps Femoris

O: Long head: Ischial Tuberosity

Short head: Linea Aspera

I: Fibula and lateral condyle of tibia.

A: Extension of the thigh, flexion and lateral rotation of knee.

Semitendinosus

O: Ischial Tuberosity

I: Inferior to medial condyle of tibia.

A: Extension of thigh, flexion and medial rotation of knee.

Semimembranosus

O: Ischial Tuberosity

I: Medial condyle of tibia.

A: Extension of thigh, flexion and medial rotation of knee.

Gluteus Medius

O: Iliac crest and ala.

I: Greater Trochanter

A: Abduction and medial rotation of thigh.

Gluteus Minimus

O: Ala

I: Greater Trochanter

A: Abduction and medial rotation of thigh.

Piriformus

O: Anterior aspect of sacrum.

I: Greater Trochanter

A: Lateral rotation and abduction of thigh; stabilizes hip joint.

Superior Gemellus

O: Ischium

I: Greater Trochanter

A: Lateral rotation; stabilizes hip joint.

Obterator Internus

O: Ischium

I: Greater Trochanter

A: Lateral rotation; stabilizes hip joint.

Inferior Gemellus

O: Ischium

I: Greater Trochanter

A: Lateral rotation; stabilizes hip joint.

Quadratus Femoris

O: Ischium

I: Greater Trochanter

A: Lateral rotation; stabilizes hip joint.

Obterator Externus

O: Ischium

I: Greater Trochanter

A: Lateral rotation; stabilizes hip joint.

Tibialis Anterior

O: Lateral condyle and upper 2/3 of tibial shaft.

I: Inferior surface of tarsals and metatarsals.

A: Dorsiflexion and inversion of the ankle.

Extensor Digitorum Longus

O: Proximal tibia and fibula.

I: Middle and distal of phalanges 2-5.

A: Dorsiflexion of ankle; extends toes.

Extensor Hallucis Longus

O: Anterior and medial surface of fibular shaft.

I: Distal phalanx of hallicus.

A: Dorsiflexion and inversion of ankle; extension of hallicus.

Fibularis Longus

O: Upper portion of lateral fibula.

I: 1st Metatarsal

A: Plantarflexion and eversion of ankle; supports arches.

Fibularis Tertius

O: Distal anterior fibula.

I: 5th Metatarsal

A: Dorsiflexion and eversion of ankle.

Fibularis Brevis

O: Distal fibula shaft.

I: Proximal end of 5th Metatarsal.

A: Plantarflexion and eversion of ankle.

Gastrocnemius

O: Medial and lateral condyles of femur.

I: Calcaneus via achilles tendon.

A: Plantarflexion of ankle; flexion of knee.

Soleus

O: Superior tibia and fibula.

I: Calcaneus via achilles tendon.

A: Plantarflexion of ankle.

Plantaris

O: Posterior surface of femur above lateral condyle.

I: Calcaneus via achilles tendon.

A: Assists in plantarflexion of ankle and flexion of knee.

Popliteus

O: Lateral condyle of femur.

I: Proximal posterior tibia.

A: Unlocks knee joint.

Tibialis Posterior

O: Proximal posterior tibia and fibula.

I: Plantar surface of tarsals and metatarsals 2-4.

A: Plantarflexion and inversion of ankle; supports arches.

Flexor Digitorum Longus

O: Middle posterior tibia.

I: Distal phalanges 2-5.

A: Plantarflexion and inversion of ankle; flexion of toes 2-5.

Flexor Hallicus Longus

O: Distal posterior fibula.

I: Distal phalanx of hallux.

A: Plantarflexion and inversion of ankle; flexion of big toe.

Extensor Digitorum Brevis

O: Anterior surface of calcaneous.

I: Proximal phalanx of hallicus and tendon of Extensor Digitorum Longus.

A: Extends toes.

Flexor Digitorum Brevis

A: Flexes toes.

Abductor Hallicus

A: Abducts big toe.

Abductor Digiti Minimi

A: Abducts toes 3-5.

Quadratus Plantae

(or Flexor Accessorius)

A: Straightens out Flexor Digitorum Longus allowing for flexion of the toes.

Lumbricals

A: Flexion and extension of the toes.

Flexor Hallicus Brevis

A: Flexion of big toe.

Flexor Digiti Minimi Brevis

A: Flexes toes.

Adductor Hallicus

A: Adducts big toe.