Intermediate Inferior Mesenteric Plexus Quiz

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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