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iliacus (iliopsas) origin

iliac fossa, iliac crest, lateral sacrum

iliacus (iliopsas) instertion

lesser trochanter

iliacus (iliopsas) action

flexes the hip

iliacus (iliopsas) nerve


psoas major (iliopsoas) origin

transverse processes, bodies, and intervertebral discs of T12-L5

psoas major (iliopsoas) insertion

lesser trochanter

psoas major (iliopsoas) action

flexes the hip

psoas major (iliopsoas) nerve

ventral rami of L1-L3

gluteus maximus origin

dorsal ilium, sacrum, coccyx

gluteus maximas insertion

IT band iliotibial tract, gluteal tuberosity

gluteus maximas action

extends, LATERALLY rotates and abducts the hip

gluteus maximas nerve

inferior gluteal nerve

gluteus medius origin

lateral surface of ilium

gluteus medius insertion

greater trochanter

gluteus medius action

abducts and MEDIALLY rotates hip

gluteus medius nerve

superior gluteal nerve

gluteus minimus origin

lateral surface of ilium

gluteus minimus insertion

greater trochanter

gluteus minimus action

abducts and medially rotates hip

gluteus minimus nerve

superior gluteal nerve

piriformis origin

anterolateral surface of sacrum

piriformis insertion

greater trochanter

piriformis action

laterally rotates hip

piriformis nerve

S1-S2, L5

what muscle causes sciatica


obturator internus origin

greater sciatic notch

obturator internus insertion

greater trochanter

obturator internus action

laterally rotates hip

obturator internus nerve

L5, S1

gemellus (superior/inferior) origin

ischial spine

gemellus (superior/inferior) insertion

greater trochanter

gemellus (superior/inferior) action

laterally rotates hip

gemellus (superior/inferior) nerve


quadratus femoris origin

ischial tuberosity

quadratus femoris insertion

greater trochanter

quadratus femoris action

laterally rotates hip

quadratus femoris nerve


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