Muscles of Thigh

rectus femoris - origin

anterior inferior iliac spine

rectus femoris - insertion

base of the patella and via the patellar tendon, the tibial tuberosity

rectus femoris - action

extends knee and flexes hip

rectus femoris - innervation

femoral

vastus lateralis - origin

upper region of intertrochanteric line, greater trochanter, lateral region of the gluteal tuberosity, lateral lip of the linear aspera

vastus lateralis - insertion

lateral capsule of the knee, base of the patella, and via the patellar tendon, the tibial tuberosity

vastus lateralis - action

extends knee

vastus lateralis - insertion

femoral

vastus medialis - origin

lower region of intertrochanteric line, medial lip of linea aspera, poximal medial supracondylar line

vastus medialis - insertion

medial capsule of the knee, base of the patella, and via the patellar tendon, the tibial tuberosity

vastus medialis - action

extends knee

vastus medialis - innervation

femoral

vastus intermedius - origin

anterior lateral regions of the upper 2/3 of femoral shaft

vastus intermedius - insertion

lateral base of the patella and via the patellar tendon the tibial tuberosity

vastus intermedius - action

extends knee

vastus intermedius- innervation

femoral

sartorius - origin

anterior superior iliac spine

sartorius - insertion

medial surface of tibia

sartorius - action

hip flexion, abduction, lateral rotation

knee flexion

sartorius - innervation

femoral nerve

pectineus - origin

pectineal line on superior pubic ramus

pectineus - insertion

pectineal (spiral) line of the posterior surface of femur

pectineus - action

hip flexion, adduction, medial rotation

pectineus - innervation

femoral

adductor longus - origin

body of pubis

adductor longus - insertion

middle 1/3 of the linea aspera of femur

adductor longus - action

hip adduction, flexion, medial rotation

adductor longus - innervation

obturator

adductor brevis - origin

inferior pubic ramus

adductor brevis - insertion

proximal 1/3 of the linear aspera of femur

adductor brevis - action

hip adduction, flexion, medial rotation

adductor brevis - innervation

obturator

adductor magnus - origin

ischial ramus and ischial tuberosity

adductor magnus - insertion

linea aspera and adductor tubercle of femur

adductor magnus - action

hip adduction, extension, medial rotation

adductor magnus - innervation

obturator

tibial portion of sciatic nerve

gracilis - origin

lower body of pubis and inferior ramus of pubis

gracilis - insertion

medial surface of tibia

gracilis - action

hip flexion, medial rotation, adduction

knee flexion

gracilis - innervation

obturator

gluteus maximus - origin

outer ilium, posterior gluteal line, throacolumbar fascia, posterior sde of sacrum and coccyx

gluteus maximus - insertion

gluteal tuberosity and ITB

gluteus maximus - action

hip extension and external rotation

seconday action: hip adduction

gluteus maximus - innervation

inferior gluteal

gluteus medius and minimus - origin

ilium

gluteus medius and minimus - insertion

greater trochanter

gluteus medius and minimus - action

abduction of hip

assist in medial and lateral rotation of hip

gluteus medius and minimus - innervation

superior gluteal

tensor fascia latae - origin

iliac crest and anterior super iliac spine

tensor fascia latae - insertion

proximal 1/3 of the ITB of the fascia lata

tensor fascia latae - action

flex, abduct, medial rotate hip

tensor fascia latae - innervation

superior gluteal

piriformis - origin

anterior side of sacrum

piriformis - insertion

apex of the greater trochanter

piriformis - action

lateral rotators of hip

piriformis - innervation

nerve to piriformis

biceps femoris - origin

long head: ischial tuberosity

short head: lateral lip of the linea aspera

biceps femoris - insertion

fibular head

biceps femoris - action

flex knee

extend hip

biceps femoris - innervation

sciatic

semimembranosus - origin

ischial tuberosity

semimembranosus - insertion

medial condyle of tibia

semimembranosus - action

flex knee

extend hip

semimembranosus - innervation

sciatic

semitendinosus - origin

ischial tuberosity

semitendinosus - insertion

medial surface of tibia

semitendinosus - action

flex knee

extend hip

semitendinosus - innervation

sciatic