Gluteal region and posterior thigh

Question 1

The greater sciatic foramen is formed by…

Answer 1

greater sciatic notch, and sacrospinous & sacrotuberous ligaments

Question 2

Muscle(s) that exit through the greater sciatic foramen

Answer 2

Piriformis

Question 3

Nerves that exit through the greater sciatic foramen

Answer 3

Sciatic, posterior cutaneous n. of the thigh, superior & inferior gluteal n., n. to quadratus femoris, n. to obturator internus, pudendal n.

Question 4

Vessels that exit through the greater sciatic foramen

Answer 4

Superior and inferior gluteal arteries & veins, internal pudendal artery & vein

Question 5

Travel inferior to piriformis

Answer 5

inferior gluteal a. & v., internal pudendal a. & v., n. to quadratus femoris, n. to obturator internus, pudendal n.

Question 6

The lesser sciatic foramen is formed by…

Answer 6

the lesser sciatic notch, and sacrospinous & sacrotuberous ligaments

Question 7

Muscle(s) that exit through the lesser sciatic foramen

Answer 7

Obturator internus

Question 8

Structures that enter the perineum through the lesser sciatic foramen

Answer 8

n. to obturator internus, pudendal n., & internal pudendal a. & v.

Question 9

Nerves of the gluteal region

Answer 9

superior gluteal n., inferior gluteal n., n. to obturator internus., n. to quadratus femoris, sciatic n.

Question 10

Superior gluteal n.

Answer 10

spinal level: L5-S1

innervates: gluteus medius, gluteus minimus, & tensor fascia lata

Question 11

Inferior gluteal n.

Answer 11

spinal level: L5-S2

innervates: gluteus meximus

Question 12

N. to obturator internus

Answer 12

spinal level: L5-S1

innervates: obturator internus & superior gemellus

Question 13

N. to quadratus femoris

Answer 13

spinal level: L5-S1

innervates: quadratus femoris & inferior gemellus

Question 14

Sciatic n.

Answer 14

spinal level: L4-S3

branches into tibial and common fibular n.

Question 15

Vessels of the gluteal region

Answer 15

Superior gluteal a. & v., inferior gluteal a. & v., internal pudendal a. & v.

Question 16

Superior gluteal a. & v.

Answer 16

Supplies superior gluteal region, travels superior to piriformis.
Branch of the posterior division of the internal iliac a.

Question 17

Inferior gluteal a. & v.

Answer 17

Supplies in inferior gluteal region and travels inferior to piriformis.
Branch of anterior or posterior division of internal iliac a. (usually posterior)

Question 18

Internal pudendal a. & v.

Answer 18

Supplies external genetalia & perineum

Branch of anterior division of internal iliac a.

Question 19

Vessels of posterior thigh

Answer 19

Perforating a. & v., popliteal a. & v.,

Question 20

Perforating arteries

Answer 20

Supply posterior thigh

Branches of deep artery of thigh

Question 21

Popliteal artery

Answer 21

Continuation of femoral artery after it passes through the adductor hiatus.
Supplies knee, leg, and foot.

Question 22

Spinal cord levels of tibial nerve

Answer 22

L4-S3

Question 23

Muscles innervated by tibial n.

Answer 23

Hamstring of adductor magnus, long head of biceps femoris, semitendonosus, semimembranosus, muscles of posterior compartment of leg, muscles of sole of foot

Question 24

Tibial nerve supplies cutaneous sensory to…

Answer 24

Medial sural n. (S1-S2)- skin of posterior leg and lateral foot
Medial (L4-L5) and lateral (S1-S2)- plantar nerves- skin of sole of foot
Medial calcaneal branch (S1-S2)- skin of heel

Question 25

Spinal cord levels of common fibular nerve

Answer 25

L4-S2

Question 26

Muscle innervated by the common fibular n.

Answer 26

Short head of biceps femoris

Question 27

Branches of common fibular n. and their spinal cord levels

Answer 27

Lateral sural n. (S1-S2), superficial fibular n. (L4-S1), deep fibular n. (L4-S1)

Question 28

Lateral sural n.

Answer 28

cutaneous sensory to skin of lateral leg

Question 29

Superficial fibular n.

Answer 29

Innervates muscles of lateral compartment of leg | Cutaneous sensory to skin of dorsum of foot

Question 30

Deep fibular n.

Answer 30

Innervates muscles to anterior compartment of thigh. Innervate muscles of dorsum of foot. Cutaneous sensory to skin between 1st & 2nd digits (interdigital cleft)