Unit 3 Muscles of Thigh

psoas major origin

vertebral bodies t12-l5
intervertebral discs t12-l5
transverse process
lumbar vertebrae

psoas major insertion

conjoined tendon with iliacus to lesser trochanter of femur
form illiopsas

psoas major function

flexion of thigh at hip joint

psoas major innervation

anterior rami l1-l3

iliacus origin

superior 2/3 iliac fossa
iliac crest
sacrum

iliacus insertion

conjoined tendon with psoas major to lesser trochanter of femur
forming illiopsas

iliacus function

flexion of thigh at hip joint

iliacus innervation

femoral nerve

gluteus maximus origin

posterior part of iliac crest
lateral edge of sacrum and coccyx

gluteus maximus insertion

gluteal tuberosity of femur
iliotibial tract

gluteus maximus function

extension of flexed femur at hip joint
lateral stabilizer of hip and knee
lateral rotation of thigh
abduction of thigh

gluteus maximus innervation

inferior gluteal nerve

gluteus medius origin

posterior part of iliac blade

gluteus medius insertion

greater trochanter of femur

gluteus medius function

abduction of thigh at hip joint
medial rotation of thigh

gluteus medius innervation

superior gluteal nerve

gluteus minimus origin

posterior part of iliac blade

gluteus minimus insertion

greater trochanter of femur

gluteus minimus function

abduction of thigh at hip joint

medial rotation of thigh

gluteus minimus innervation

superior gluteal nerve

tensor fasciae latae origin

outer lip of iliac crest

tensor fasciae latae insertion

lateral condyle of tibia via iliotibial tract

tensor fasciae latae function

stabilizes the knee in extension

tensor fasciae latae innervation

superior gluteal nerve

iliotibial tract insertion

lateral condyle of tibia

iliotibial tract function

prevents tilting pelvis when one leg lifted

piriformis origin

anterior surface of sacrum

piriformis insertion

greater trochanter of femur

piriformis function

lateral rotation of extended femur at hip joint
abduction of flexed femur at hip joint

piriformis innervation

branches of spinal nerves s1-s2

gemellus superior origin

ischial spine

gemellus superior insertion

greater trochanter of femur

gemellus superior function

lateral rotation of extended femur at hip joint
abduction of flexed femur at hip

gemellus superior innervation

nerve to obturator internus

obturator internus origin

anterolateral wall of true pelvis
deep surface of obturator membrane
superior ramus of pubis and bone surrounding obturator foramen

obturator internus insertion

greater trochanter of femur

obturator internus function

lateral rotation of extended femur at hip joint
abduction of flexed femur at hip joint

obturator internus innervation

nerve to obturator internus

gemellus inferior origin

ischial tuberosity

gemellus inferior insertion

greater trochanter of femur

gemellus inferior function

lateral rotation of extended femur at hip joint

abduction of flexed femur at hip joint

gemellus inferior innervation

nerve to quadratus femoris

quadratus femoris origin

lateral aspect of ischium anterior to ischial tuberosity

quadratus femoris insertion

intertrochanteric crest of femur

quadratus femoris function

lateral rotation of femur at hip joint

quadratus femoris innervation

nerve to quadratus femoris

obturator externus origin

external surface of obturator foramen and obturator membrane

obturator externus insertion

trochanteric fossa of femur

obturator externus function

lateral rotation of femur at hip joint

obturator externus innervation

obturator nerve

gracillis origin

external surface of body of pubis
ischiopubic ramus

gracillis insertion

medial surface of proximal shaft of tibia

gracillis function

adduction of thigh at hip joint
flexion of leg at knee joint

gracillis innervation

obturator nerve

adductor longus origin

external surface of body of pubis

adductor longus insertion

linea aspera of femur

adductor longus function

adduction of thigh at hip joint
medial rotation of thigh at hip joint

adductor longus innervation

obturator nerve

pectineus origin

pectineal line of pubis

pectineus insertion

posterior surface of femur
inferior to lesser trochanter

pectineus function

adduction of thigh at hip joint
flexion of thigh at hip joint

pectineus innervation

femoral nerve

adductor brevis origin

external surface of pubis
inferior pubic ramus

adductor brevis insertion

linea aspera of femur
posterior surface of femur

adductor brevis function

adduction of thigh at hip joint
medial rotation of thigh at hip joint

adductor brevis innervation

obturator nerve

adductor component of adductor magnus origin

ischiopubic ramus

adductor component of adductor magnus insertion

posterior surface of femur
linea aspera of femur

adductor component of adductor magnus function

adduction of thigh at hip joint
medial rotation of thigh at hip joint

adductor component of adductor magnus innervation

obturator nerve

hamstring component of adductor magnus origin

ischial tuberosity of ischium

hamstring component of adductor magnus insertion

adductor tubercle of femur

hamstring component of adductor magnus function

adduction of thigh at hip joint
medial rotation of thigh at hip joint

hamstring component of adductor magnus innervation

tibial portion of sciatic nerve

rectus femoris origin

anterior inferior iliac spine
ilium superior to acetabulum

rectus femoris insertion

patella via quadriceps femoris tendon

rectus femoris function

extension of leg at knee joint
flexion of leg at hip joint

rectus femoris innervation

femoral nerve

vastus lateralis origin

interotrochanteric line of femur
greater trochanter of femur
linea aspera of femur

vastus lateralis insertion

patella via quadriceps femoris tendon

vastus lateralis function

extension of leg at knee joint

vastus lateralis innervation

femoral nerve

vastus medialis origin

medial part of interochanteric line of femur
linea aspera of femur
pectineal line of femur

vastus medialis insertion

patella via quadriceps femoris tendon

vastus medialis function

Extension of leg at knee joint

vastus medialis innervation

femoral nerve

vastus intermedius origin

upper 2/3 of femoral shaft

vastus intermedius insertion

patella via quadriceps femoris tendon

vastus intermedius function

extension of leg at knee joint

vastus intermedius innervation

femoral nerve

sartorius origin

anterior superior iliac spine

sartorius insertion

medial surface of tibia inferomedial to tibial tuberosity

sartorius function

flexion of thigh at hip joint
flexion of leg at knee joint

sartorius innervation

femoral nerve

long head of biceps femoris origin

ischial tuberosity

long head of biceps femoris insertion

head of fibula

long head of biceps femoris function

flexion of leg at knee joint
extension and lateral rotation of thigh at hip joint
lateral rotation of leg at knee joint

long head of biceps femoris innervation

tibial portion of sciatic nerve

short head of biceps femoris origin

linea aspera of femur
lateral supracondylar ridge of femur

short head of biceps femoris insertion

head of fibula