Intermediate Inferior Mesenteric Plexus Quiz

Q1. What is the relationship between the inferior mesenteric plexus and the inferior mesenteric artery?

• They are anatomically unrelated
• The plexus surrounds and follows the artery and its branches
• The artery passes through the spinal cord
• The plexus lies only inside the arterial lumen

Q2. Which autonomic network superior to the inferior mesenteric plexus helps connect it with higher abdominal plexuses?

• Cervical plexus
• Brachial plexus
• Intermesenteric plexus
• Sacral somatic plexus

Q3. Which autonomic plexus inferiorly continues pathways from the lower abdominal prevertebral network toward the pelvis?

• Cardiac plexus
• Brachial plexus
• Cervical plexus
• Superior hypogastric plexus

Q4. What type of sympathetic fibers commonly leave the inferior mesenteric ganglion toward hindgut targets?

• Special visceral motor fibers
• Preganglionic parasympathetic fibers only
• Postganglionic sympathetic fibers
• Somatic motor fibers

Q5. Which inferior mesenteric arterial branch carries autonomic plexus fibers toward the descending colon?

• Ileocolic artery
• Right gastric artery
• Middle colic artery
• Left colic artery

Q6. Which branches carry inferior mesenteric periarterial fibers toward the sigmoid colon?

• Inferior pancreaticoduodenal arteries
• Sigmoid arteries
• Short gastric arteries
• Right colic arteries

Q7. Which inferior mesenteric branch carries autonomic fibers toward the upper rectum?

• Superior rectal artery
• Deep circumflex iliac artery
• Inferior epigastric artery
• Superior gluteal artery

Q8. How do pelvic splanchnic parasympathetic fibers interact with lower abdominal autonomic plexuses?

• They can ascend through autonomic plexuses toward hindgut targets
• They terminate only in the pelvic floor
• They normally synapse in the inferior mesenteric ganglion
• They become somatic motor fibers in the lumbar plexus

Q9. Do pelvic splanchnic parasympathetic fibers normally synapse in the inferior mesenteric ganglion?

• No, they pass through related plexuses toward terminal or intramural ganglia
• Yes, all parasympathetic fibers synapse there
• No, because pelvic splanchnic nerves contain only somatic fibers
• Yes, because it is a parasympathetic ganglion

Q10. Why is the inferior mesenteric plexus considered part of a continuous autonomic network?

• It is a branch of the femoral nerve
• It is completely isolated from other autonomic plexuses
• It connects with neighboring aortic, intermesenteric, and hypogastric autonomic pathways
• It exists only inside the wall of the sigmoid colon