hip AOIN

Question 1

Gluteus Maximus

Answer 1

A: all fibers - extend, laterally rotate and abduct the hip
: lower fibers - adduct the hip
O: coccyx, edge of sacrum, posterior iliac crest, sacrotuberous and sacroiliac ligaments
I: IT band (upper fibers), gluteal tuberosity (lower fibers)
N: inferior gluteal L5,S1,2

Question 2

Gluteus Medius

Answer 2

A: all fibers - abduct the hip
: anterior fibers - flex and medially rotate hip
: posterior fibers - extend and laterally rotate hip
O: gluteal surface of ilium, between post and ant gluteal lines, just below iliac crest
I: lateral aspect of greater trochanter
N: superior gluteal L4,5,S1

Question 3

Gluteus Minimus

Answer 3

A: abduct, medially rotate and flex teh hip
O: gluteal surface of ilium between the anterior and inferior gluteal lines
I: anterior aspect of greater trochanter
N: superior gluteal L4,5,S1

Question 4

Tensor Fasciae Latae and Iliotibial Tract

Answer 4

A: flex, medially rotate and abduct the hip
O: iliac crest, posterior to the ASIS
I: IT band
N: superior gluteal L4,5,S1

Question 5

Piriformis

Answer 5

A: laterally rotate the hip, abduct the hip when flexed
O: anterior surface of sacrum
I: superior aspect of greater trochanter
N: sacral plexus (nerve to piriformis) L5,S1,2

Question 6

Quadratus Femoris

Answer 6

A: laterally rotate the hip
O: lateral border of ischial tuberosity
I: intertrochanteric crest, between the greater and lesser trochanters
N: sacral plexus (nerve to quadratus femoris) L4,5,S1,2

Question 7

Obturator Internus

Answer 7

A: laterally rotate the hip
O: obturator membrane and inferior surface of obturator foramen
I: medial surface of greater trochanter
N: sacral plexus (nerve to obturator internus) L5,S1,2

Question 8

Obturator Externus

Answer 8

A: laterally rotate the hip
O: rami of pubis and ischium, obturator membrane
I: trochanteric fossa of femur
N: obturator nerve L3,4

Question 9

Gemellus Superior

Answer 9

A: laterally rotate the hip
O: ischial spine
I: medial surface of greater trochanter
N: sacral plexus (nerve to obturator internus) L5,S1,2

Question 10

Gemellus Inferior

Answer 10

A: laterally rotate the hip
O: ischial tuberosity
I: medial surface of greater trochanter
N sacral plexus (nerve to quadratus femoris) L4,5,S1,2

Question 11

Iliacus

Answer 11

A: with origin fixed - flex and laterally rotate hip
: with insertion fixed - flex trunk to thigh, tilt pelvis anteriorly
O: iliac fossa
I: lesser trochanter
N: femoral L1,2,3,4

Question 12

Psoas Major

Answer 12

A: with origin fixed - flex and laterally rotate hip
: with insertion fixed - flex trunk to thigh, tilt pelvis anteriorly
: unilaterally - assist to laterally flex lumbar spine
O: bodies and transverse processes of lumbar vertebrae
I: lesser trochanter
N: lumbar plexus L1,2,3,4

Question 13

Psoas Minor

Answer 13

A: assist to create lordotic curve in lumbar spine
O: body and transverse process of first lumbar vertebra
I: superior ramus of pubis
N: lumbar plexus L1,2