sartorius

O: ASIS

I: upper part of medial surface of shaft of tibia

A: Flexes, abducts, external rotation of femur; slight internal rotation of leg at the knee joint
after flexion

N: femoral nerve

rectus femoris

O: AIIS

I: tibial tuberosity via patellar tendon

A: flexes thigh, extends leg

N: femoral nerve

vastus lateralis

O: intertrochanteric line

I: tibial tuberosity via patellar tendon

A: extends leg

N: femoral nerve

vastus medialis

O: intertrochanteric line

I: tibial tuberosity via patellar tendon

A: extends leg

N: femoral nerve

vastus intermedius

O: anterior and lateral 2/3 of femur

I: tibial tuberosity via patellar tendon

A: extends leg

N: femoral nerve

gracilis

O: pubic ramus

I: upper, medial shaft of tibia

A: adducts thigh

N: obturator nerve

pectineus

O: superior ramus of pubis

I: lesser trochanter

A: flexes thigh, assists in adduction when hip flexed

N: femoral nerve

adductor longus

O: anterior pubis

I: linea aspera

A: adducts thigh, assists with medial rotation

N: obturator nerve

adductor brevis

O: inferior ramus of pubis

I: linea aspera

A: adducts thigh

N: obturator nerve

adductor magnus

O: inferior ramus of pubis

I: linea aspera, adductor tubercle of femur

A: adducts and extends thigh

N: obturator nerve

biceps femoris

O: long head- ischial tuberosity

short head- linea aspera

I: head of fibula

A: flexes knee and

long head- extends thigh

N: long head- tibial nerve

short head- common peroneal nerve

semitendinosus

O: ischial tuberosity

I: medial, superior tibia

A: flexes knee, extends thigh

N: tibial nerve

semimembranosus

O: ischial tuberosity

I: posterior, superior tibia

A: flexes knee, extends thigh

N: tibial nerve