Chapter 6 (Neurovascular Structures of Pelvis)

Question 1

(Blood supply to pelvis and perineum)

The primary arterial blood supply to the pelvis and perineum is the ____ ____ ____.

Answer 1

Internal iliac artery

Question 2

(Blood supply to pelvis and perineum)

Anterior division:

Answer 2

• Umbilical artery
• Obturaor artery
• Inferior vesical artery (males)
• Uterine artery (females)
• Vaginal artery (females)
• Middle rectal artery
• Internal pudendal artery
• Inferior gluteal artery

Question 3

(Blood supply to pelvis and perineum)

The primary blood supply to the pelvis and perineum is the ___ _____ ____.

Answer 3

Internal iliac artery

Question 4

(Blood supply to pelvis and perineum)

Posterior division - Iliolumbar artery:

Answer 4

• Quadratus lumborum

- Psoas major

Question 5

(Blood supply to pelvis and perineum)

Posterior division - Lateral sacral artery:

Answer 5

• Erector spinae

- Skin overlying the sacrum

Question 6

(Blood supply to pelvis and perineum)

Posterior division - Superior gluteal artery:

Answer 6

Largest of the division, supplies gluteal muscles

Question 7

(Blood supply to pelvis and perineum)

Additional arteries of the pelvis

Answer 7

• Ovarian artery: Supplies ovary and uterine tube
• Median sacral artery: Branches supply the rectum
• Superior rectal artery: Rectum

Question 8

Veins of the pelvis…

Answer 8

• Accompany arteries of the same name

- Form communicating plexuses of veins around pelvic organs

Question 9

Which are the communicating plexuses of veins

Answer 9

• Vesical venous plexus and prostatic venous plexus
• Rectal venous plexus
• Uterovaginal venous plexus

Question 10

The internal iliac vein is the ___ ___ of the pelvis

Answer 10

main drainage

Question 11

Internal iliac vein drains into common iliac vein, which drains into ____ ____ ____ at the level of _____.

Answer 11

Inferior vena cava; LV5

Question 12

(Internal iliac vein)

Some veins drain through:

Answer 12

• Inferior mesenteric vein (portal system) - Superior rectal vein
• Inferior vena cava - Right ovarian/testicular vein/ left via renal vein

Question 13

Sacral plexus supplies the …

Answer 13

skeletal muscle, bones, joints and skin of the pelvis, perineum, and lower limb

Question 14

(Sacral Plexus)

Contains ____ ____ from ____ ___ of spinal nerves (L4 to Co)

Answer 14

Somatic fibers from anterior rami

Question 15

(Sacral Plexus)

Which somatic fibers are involved?

Answer 15

• GSA (pain, temperature, touch, pressure, proprioception)

- GSE (motor)

Question 16

(Sacral Plexus)

Contains autonomic fibers, which are

Answer 16

Sympathetic GVE (vasomotion, pilomotion, sudomotion)

Question 17

(Injury or compression of somatic pelvic nerves)

Compression of ____ ____ by fetal head during childbirth produces ____ ____ ____ ____.

Answer 17

sacral plexus; pain in lower limbs

Question 18

(Injury or compression of somatic pelvic nerves)

Pudendal nerve entrapment syndrome/ pudendal neuralgia:

Answer 18

Nerve compression between sacrotuberous and sacrospinous ligaments (70%), in pudendal canal (20%) or elsewhere along its course that results in pain in perineum.

Question 19

Pudendal nerve entrapment syndrome/ pudendal neuralgia may be associated with …

Answer 19

urinary and bowel problems and sexual dysfunction.