Muscles of Gluteal Region

Question 1

GLUTEUS MAXIMUS (Origin)

Answer 1

Behind Posterior gluteal line
Fascia Gluteus Medius and Erector Spinae
Dorsal surface Sacrum
Lateral margin coccyx
Sacrotuberous ligament

Question 2

GLUTEUS MAXIMUS (Insertion)

Answer 2

Posterior aspect Iliotibial Tract
Gluteal tuberosity proximal femur

Question 3

GLUTEUS MAXIMUS (Action)

Answer 3

Hip extension
Lateral rotation
Abduction
Laterally stabilizes hip and knee joint

Question 4

GLUTEUS MAXIMUS (Innervation)

Answer 4

INFERIOR Gluteal Nerve (L5-S2)

Question 5

GLUTEUS MEDIUS (Origin)

Answer 5

External surface Ilium
(between Anterior and Posterior gluteal line)

Question 6

GLUTEUS MEDIUS (Insertion)

Answer 6

Lateral surface greater trochanter

Question 7

GLUTEUS MEDIUS (Action)

Answer 7

Abduction
Medial Rotation
Maintain Horizontal pelvic plane

Question 8

GLUTEUS MEDIUS (Innervation)

Answer 8

SUPERIOR Gluteal Nerve (L4-S1)

Question 9

GLUTEUS MINIMUS (Origin)

Answer 9

External surface Ilium
(between Anterior and Inferior gluteal line)

Question 10

GLUTEUS MINIMUS (Insertion)

Answer 10

Anterolateral surface greater trochanter

Question 11

GLUTEUS MINIMUS (Action)

Answer 11

Abduction
Medial Rotation
Maintain Horizontal pelvic plane

Question 12

GLUTEUS MINIMUS (Innervation)

Answer 12

SUPERIOR Gluteal Nerve (L4-S1)
~ Trendelenburg’s gait

Question 13

HIP LATERAL ROTATORS

Answer 13

Inferior to Gluteus Medius
Covered by Gluteus Maximus
Posterior to hip joint
Innervated by Sacral Plexus

Question 14

PIRIFORMIS (Origin)

Answer 14

Anterior surface sacrum

Question 15

PIRIFORMIS (Insertion)

Answer 15

Through Greater Sciatic Foramen
- Superomedial surface greater trochanter

Question 16

PIRIFORMIS (Action)

Answer 16

Lateral Rotation

Question 17

PIRIFORMIS (Innervation)

Answer 17

Nerve to Piriformis (Anterior Rami S1-S2)

Question 18

OBTURATOR INTERNUS (Origin)

Answer 18

Medial aspect pelvic anterolateral wall
- obturator membrane and surrounding bones

Question 19

OBTURATOR INTERNUS (Insertion)

Answer 19

Through Lesser Sciatic Foramen
- Upper Medial aspect greater trochanter

Question 20

OBTURATOR INTERNUS (Action)

Answer 20

Lateral Rotation when extended
Abducts when flexed

Question 21

OBTURATOR INTERNUS (Innervation)

Answer 21

Nerve to Obturator Internus (L5-S1)

Question 22

SUPERIOR/INFERIOR GEMELLUS (Origin)

Answer 22

SUPERIOR - external Ischial Spine
INFERIOR - Superior aspect Ischial Tuberosity

Question 23

SUPERIOR/INFERIOR GEMELLUS (Insertion)

Answer 23

Tendons fuse insert Obturator Internus

Question 24

SUPERIOR/INFERIOR GEMELLUS (Action)

Answer 24

Lateral Rotation (extended)
Abducts (flexed)

Question 25

SUPERIOR/INFERIOR GEMELLUS (Innervation)

Answer 25

SUPERIOR = Nerve to Obturator Internus (L5-S1)
INFERIOR = Nerve to Quadratus Femoris (L5-S1)

Question 26

QUADRATUS FEMORIS (Origin)

Answer 26

Lateral surface Ischium
- anterior ischial tuberosity

Question 27

QUADRATUS FEMORIS (Insertion)

Answer 27

Quadrate Tubercle on Intertrochanteric Crest

Question 28

QUADRATUS FEMORIS (Action)

Answer 28

Lateral Rotation

Question 29

QUADRATUS FEMORIS (Innervation)

Answer 29

Nerve to Quadratus Femoris (L5-S1)

Question 30

OBTURATOR EXTERNUS (Origin)

Answer 30

External surface Obturator membrane
Adjacent bones

Question 31

OBTURATOR EXTERNUS (Insertion)

Answer 31

Pass Oblique Inferior to Femoral neck
- Trochanteric Fossa

Question 32

OBTURATOR EXTERNUS (Action)

Answer 32

Lateral Rotation

Question 33

OBTURATOR EXTERNUS (Innervation)

Answer 33

Obturator Nerve (Posterior Division L3-L4)