Autonomic Innervation of Abdominopelvic region

Question 1

Which part of the spinal cord provides SNS

Answer 1

Thoracolumbar region

Question 2

Which part of the spinal cord provides PNS

Answer 2

Craniosacral region

Question 3

What are the effects of the ANS on the Longitudinal and Circular muscle fibres of teh GIT

Answer 3

SNS: no motility
PNS: motility

Question 4

What are the effects of the ANS on the Spincter muscles of the GIT

Answer 4

SNS: Contraction
PNS: relaxation

Question 5

What are the effects of the ANS on the Glands of teh GIT

Answer 5

SNS: No secretion
PNS: Secretion

Question 6

What are the effects of the ANS on the Splenic Capsule

Answer 6

SNS: Contraction
PNS: No effect

Question 7

What are the effects of the ANS on the Pancreas

Answer 7

Exocrine pancreas:
SNS: no secretion
PNS: secretion

Endocrine pancreas
SNS: Insulin secretion
PNS: no effect

Question 8

What are the effects of the ANS on the Urinary Bladder

Answer 8

Functional Bladder Sphincter:
SNS: Contraction
PNS: Relaxation

Detrusor Muscle:
SNS: Relaxation
PNS: Contraction

Question 9

What are the effects of the ANS on the Seminal vesicle and ductus deferens

Answer 9

SNS: contraction (ejaculation)
PNS: no effect

Question 10

What are the effects of the ANS on the uterus

Answer 10

SNS: Contraction or relaxation (depending on hormonal status)

PNS: No effect

Question 11

What are the effects of the ANS on the arteries

Answer 11

SNS: Vasoconstriction
PNS: Vasodilation of the arteries of penis and clitoris (erection)

Question 12

What are the effects of the ANS on the suprarenal glands (medulla of)

Answer 12

SNS: release of adrenalin
PNS: no effect

Question 13

What are the effects of the ANS on the urinary tract

Answer 13

SNS: Vasoconstriction (urine formation)
PNS: Vasodilation

Question 14

Explain how referred pain works

Answer 14

Convergence of:

• somatic fibres
• visceral afferent fibres

to a common level of the spinal cord,

Question 15

Where is pancreatic pain referred

Answer 15

Area above umbilicus right around the torso

Question 16

Where is stomach pain referred

Answer 16

To area near stomach

Question 17

Where is liver pain reffered

Answer 17

To:

-where liver is

Question 18

Where is gallbladder pain referred

Answer 18

To:

• where gallbladder is
• Shoulder region

Question 19

Where is small intestine pain referred

Answer 19

To area encircling the umbilicus

Question 20

Where is large intesting pain referred

Answer 20

To area just under the umbilicus

Question 21

Where is bladder pain referred

Answer 21

To area where bladder is

Question 22

Where is gonadal pain referred

Answer 22

To inguinal canal

Question 23

What are the autonomic plexuses in the abdomen and pelvis

Answer 23

Celiac plexus
Superior mesenteric plexus
Inferior mesenteric plexus
Superior hypogastric plexus
Inferior hypogastric plexus (NB there are 2 as they are along the inguinal vessels)

Question 24

What does the Vagus nerve supply in the abdominal region

Answer 24

Foregut and midgut associated organs (up till the splenic flexture)

Question 25

Which plexuses does the Vagus nerve supply in the abdomen

Answer 25

Superior mesenteric plexus

Question 26

What nucleus is the SNS supply for the testis?

Answer 26

Renal gangion (see pl. 394)