Deep Hip Musculature

Question 1

Pectineus

Answer 1

O: Superior ramus of pubis

I: Pectineal line

A: Hip adduction and internal rotation

N: Femoral and obturator

Question 2

Piriformis

Answer 2

O: anterior surface of sacrum

I: superior aspect of greater trochanter

A: hip external rotation and hip adduction with hip in flexion

N: sacral plexus

Question 3

Obturator internus

Answer 3

O: inferior surface of obturator foramen

I: medial surface of greater trochanter

A: hip external rotation

N: sacral plexus

Question 4

Obturator externus

Answer 4

O: pubic/ischial ramus

I: trochanteric fossa

A: hip external rotation

N: obturator

Question 5

Gemellus superior

Answer 5

O: ischial spine

I: medial surface of greater trochanter

A: hip external rotation

N: sacral plexus

Question 6

Gemellus inferior

Answer 6

O: ischial tuberosity

I: medial surface of greater trochanter

A: hip external rotation

N: sacral plexus

Question 7

Quadratus femoris

Answer 7

O: lateral border of ischial tuberosity

I: intertrochanteric crest

A: hip external rotation

N: sacral plexus

Question 8

Gluteus Maximus

Answer 8

O: coccyx, edge of scrum, posterior iliac crest

I: 2/3 ITB, 1/3 to gluteal tuberosity

A: hip abduction, extension, external rotation

N: inferior gluteal

Question 9

Gluteus medius

Answer 9

O: gluteal surface of ilium

I: lateral aspect of greater trochanter

A: hip abduction

N: superior gluteal

Question 10

Gluteus minimus

Answer 10

O: gluteal surface of ilium between anterior/inferior gluteal lines

I: anterior aspect of greater trochanter

A: hip abduction, internal rotation, flexion

N: superior gluteal