Muscles of the Iliac and Gluteal Region

origin of the psoas major

transverse processes of the lumbar vertebrae (bodies and intervertebral disks)

insertion of the psoas major

lesser trochanter of the femur

action of the psoas major

flexion of the thigh and flexion of the trunk

innervation of the psoas major

L2 and L3 branches of the lumbar plexus

origin of the iliacus

upper 2/3 of the iliac fossa of the ilium

insertion of the iliacus

lesser trochanter of the femur with the tendon of the psoas major

action of the iliacus

flexion of the thigh

innervation of the iliacus

femoral nerve

origin of the gluteus maximus

outer surface of the ilium and the adjacent posterior surface of the sacrum and the coccyx

insertion of the gluteus maximus

iliotibial tract and the gluteal tuberosity

action of the gluteus maximus

abduction of the thigh, extension of the thigh, and lateral rotation of the thigh

innervation of the gluteus maximus

inferior gluteal nerve

origin of the gluteus medius

outer surface of the ilium inferior to the iliac crest

insertion of the gluteus medius

lateral surface of the greater trochanter of the femur

action of the gluteus medius

abduction of the thigh and medial rotation of the thigh (1)

innervation of the gluteus medius

superior gluteal nerve (1)

origin of the gluteus minimus

outer surface of the ilium between the anterior and inferior gluteal line

insertion of the gluteus minimus

anterior surface of the greater trochanter of the femur

action of the gluteus minimus

abduction of the thigh and medial rotation of the thigh (2)

innervation of the gluteus minimus

superior gluteal nerve (2)

origin of the tensor fascia latae

outer lip of the iliac crest between the anterior superior iliac spine and the iliac tubercle

insertion of the tensor fascia latae

upper part of the iliotibial tract

action of the tensor fascia latae

abduction of the thigh and flexion of the thigh

innervation of the tensor fascia latae

superior gluteal nerve (2)

origin of the piriformis

internal surface of the sacrum

insertion of the piriformis

upper border of the greater trochanter of the femur

action of the piriformis

abduction of the thigh and lateral rotation of the thigh

innervation of the piriformis

1st and 2nd sacral nerves

origin of the obturator internus

pelvic surface of the obturator membrane and surrounding bones

insertion of the obturator internus

common tendon with the superior and inferior gemelli to the medial surface of the greater trochanter of the femur

action of the obturator internus

lateral rotation of the thigh (1)

innervation of the obturator internus

nerve to the obturator internus

origin of the gemellus superior

spine of the ischium

insertion of the gemellus superior

tendon of the obturator internus into the upper border of the greater trochanter of the femur (1)

action of the gemellus superior

lateral rotation of the thigh (2)

origin of the gemellus inferior

upper margin of the ischial tuberosity

insertion of the gemellus inferior

tendon of the obturator internus to the upper border of the greater trochanter of the femur (2)

action of the gemellus inferior

lateral rotation of the thigh (3)

innervation of the gemellus inferior

branch of nerve to the quadratus femoris from the sacral plexus

origin of the quadratus femoris

lateral border of the ischial tuberosity

insertion of the quadratus femoris

right below the intertrochanteric crest of the femur

action of the quadratus femoris

lateral rotation of the thigh (4)

innervation of the quadratus femoris

nerve to the quadratus femoris

origin of the obturator externus

outer surface of the inferior and superior rami of the pubis, ramus of the ischium

insertion of the obturator externus

trochanteric fossa of the femur

action of the obturator externus

lateral rotation of the thigh (5)

innervation of the obturator externus

obturator nerve