muscles of thegluteal region

Question 1

Nerve roots for inferior gluteal nerve
and muscles innervating by it

Answer 1

• (L5,S1,S2)
  It supplies the gluteus maximus

Question 2

Nerve roots for Superior gluteal nerve
and muscles innervating by it

Answer 2

(L4,L5,S1)
supplies gluteus medius,
gluteus minimus
and tensor fasciae latae

Question 3

Superficial abductors and extenders –

Answer 3

group of large muscles that abduct and extend the femur. Includes the gluteus maximus, gluteus medius, gluteus minimus and tensor fascia lata.

Question 4

Nerve roots for Sciatic nerve
and muscles innervating by it

Answer 4

(L4,L5,S1,S2,S3)–
gives tibial & common fibular nerves

Question 5

Nerve roots for Posterior Cutaneous nerve of thigh
and muscles innervating by it

Answer 5

(S1,S2,S3)- supplies skin of scrotum,
labium majus, skin of postero-inferior quadrant of gluteal region

Question 6

Nerve roots for Nerveto quadratus femoris
and muscles innervating by it

Answer 6

(L4,L5,S1)- supplies quadratus femoris,
inferior gemellus, hip joint

Question 7

Nerve roots for Pudenda lnerve
and muscles innervating by it

Answer 7

(S2, S3, S4)- supplies ischiorectal fossa

Question 8

Nerve roots for Nerveto obturator internus
and muscles innervating by it

Answer 8

(L5, S1, S2)- supplies obturator internus & superior
gemellus

Question 9

Nerve roots for Perforating cutaneous nerve
and muscles innervating by it

Answer 9

(S2,S3)
supplies skin of postero-inferior
quadrant of gluteal region

Question 10

Deep lateral rotators –

Answer 10

group of smaller muscles that mainly act to laterally rotate the femur. Includes the quadratus femoris, piriformis, gemellus superior, gemellus inferior and obturator internus

Question 11

The arterial supply to these muscles(gluteal)

Answer 11

is mostly via the superior and inferior gluteal arteries – branches of the internal iliac artery. Venous drainage follows the arterial supply.

Question 12

CHIEF EXTENSOR
OF THIGH AT HIP
JOINT

Answer 12

Gluteus maximus

Question 13

POWERFUL
ABDUCTORS OF
THIGH

Answer 13

Gluteus minimus,medias

Question 14

ABDUCTOR
OF THIGH

Answer 14

Fascia lata muscles

Question 15

Gluteus maximus(origin,insertion,action and nerve supply)

Answer 15

ORIGIN
*Iliac crest, posterior part of gluteal region, posterior gluteal line, aponeurosis of erector spinae, dorsal surface of lower part of sacrum, Sacrotuberous ligament, fascia covering gluteus maximus.
INSERTION
*Gluteal tuberosity (deep fibresof lower part of muscle)
*Iliotibial tract
NERVE SUPPLY
*Inferior gluteal nerve (L5,S1,2)
ACTION
*Chief Extensorof hip eg.running, climbing stairs
*Lateralrotator of thigh (assists)
*Abductor of thigh (upperfibres)
*Stabilizes knee with tensor fascia lata

Question 16

Trochanteric anastomosis(Trochantericfossa)
( arteries associated with it and location)

Answer 16

• Superiorgluteal artery(deep branch)
• Medialcircumflexfemoral(↑)
• Lateralcircumflexfemoral(↑)
• Inferiorglutealartery

Question 17

cruciate aanastomosis ( arteries associated with it and location)

Answer 17

The anastomosis is at the upper part of back of femur=lessertrochanter
* Descending branch of Inferiorgluteal artery
* Ascending branch of 1stperforatingartery(↑)
* Medialcircumflexartery ( )
* Lateralcircumflexfemoral

Question 18

Gluteus medius(origin,insertion,action and nerve supply)

Answer 18

ORIGIN
*Gluteal surface of ilium between the anterior and
posterior gluteal lines
INSERTION
*Greater trochanter of femur, on oblique ridge on the
lateral surface.
NERVE SUPPLY
*Superiorgluteal nerve (L4, L5, S1)
ACTION
*Powerful abductor
*Medialrotator(anterior fibres)

Question 19

Gluteus minimus(origin,insertion,action and nerve supply)

Answer 19

ORIGIN
*Gluteal surface of ilium between the anterior and posterior gluteal lines
INSERTION
*Greater trochanter of femur, on a ridge on the lateral part of the anterior surface.
NERVE SUPPLY
*Superior gluteal nerve (L5,S1,2)
ACTION
*Powerful abductor
Posterior
*Medial rotator(anterior fibres)

Question 20

Gluteus fascia latae(origin,insertion,action and nerve supply

Answer 20

ORIGIN
*Anterior 5cm of the outer lip of the iliac crest up to the tubercle
INSERTION
*Iliotibial tract 3-5cm below the level of greater trochanter.
NERVE SUPPLY
*Superiorgluteal nerve (L4, L5,S1)
ACTION
*Abductor and medialrotator of the thigh
*Extensor of the knee

Question 21

Gluteus pirifomis(origin,insertion,action and nerve supply

Answer 21

ORIGIN (from within pelvis)
*Pelvic surface of middle three pieces of sacrum by
three digitations.
*Uppermargin of greater sciatic notch and adjoining
areas of sacroiliac joint and sacrotuberousligament.
INSERTION
*Apex of greater trochanter of femur (as rounded tendon)
NERVE SUPPLY
*Ventral rami of S1, S2
ACTION
*Lateralrotator

Question 22

superior gamelli(origin,insertion,action and nerve supply

Answer 22

ORIGIN
*Posterior surface of ischial spine and upper part of
lesser sciatic notch.
INSERTION
*Blends with tendon of obturator internus & inserts onto
medial surface of greater trochanter of femur.
NERVE SUPPLY
*Nerve to obturator internus (L5, S1, S2)
ACTION
*Lateral rotator of the thigh

Question 23

inferior gamelli(origin,insertion,action and nerve supply

Answer 23

INFERIOR GEMELLI
ORIGIN
*Upper part of ischial tuberosity and lower part of lesser
sciatic notch.
INSERTION
*Blends with tendon of obturator internus & inserts onto
medial surface of greater trochanter of femur.
NERVE SUPPLY
*Nerve to quadratus femoris (L4, L5, S1)
ACTION
*Lateral rotator of the thigh

Question 23

obturator internus (origin,insertion,action and nerve supply

Answer 23

ORIGIN
*Pelvic surface of obturator membrane.
*Pelvic surface of body of ischium, ischial tuberosity,
ischiopubic rami and ilium below the pelvic brim.
*Obturatorfascia
INSERTION
*Leaves pelvis through lesser sciatic foramen, passes the
notch and runs laterally to insert on medial surface of
greater trochanter of femur.
NERVE SUPPLY
*Nerve to obturator internus (L5, S1, S2)
ACTION
*Lateral rotator of the thigh

Question 24

Quadratus femoris(origin,insertion,action and nerve supply)

Answer 24


ORIGIN
* Upper part of the outer border of ischial tuberosity.
INSERTION
* Quadrate tubercle and the area below it.

NERVE SUPPLY
* Nerve to quadratus femoris (L4, L5,S1)
ACTION
* Lateral rotator of the thigh