Intermediate Least Splanchnic Nerve Quiz

Q1. How does the least splanchnic nerve typically reach the abdomen from the thorax?

• It enters through the foramen magnum
• It passes through the inguinal canal
• It passes through or behind the diaphragmatic crus
• It passes through the obturator canal

Q2. Which autonomic plexus is closely associated with the renal artery and receives fibers related to the least splanchnic pathway?

• Brachial plexus
• Cervical plexus
• Sacral somatic plexus
• Renal plexus

Q3. How do postganglionic sympathetic fibers associated with the renal plexus commonly reach the kidney?

• Along the renal arterial tree
• Through the femoral nerve
• Through the vagal trunks
• Through the inguinal ligament

Q4. Which statement best compares the usual segmental origins of the lesser and least splanchnic nerves?

• Lesser from C1 to C4 and least from C5
• Both arise exclusively from S2 to S4
• Lesser from L4 to L5 and least from S1
• Lesser from T10 to T11 and least from T12

Q5. What is the relationship between the least splanchnic nerve and the aorticorenal plexus?

• It terminates only in the anterior abdominal wall
• It forms the somatic lumbar plexus
• It can contribute sympathetic fibers to the aorticorenal plexus
• It is a parasympathetic branch of the vagus

Q6. Which sympathetic effect can renal autonomic fibers associated with this pathway produce?

• Direct production of urine by neurons
• Generalized relaxation of renal vascular smooth muscle
• Voluntary contraction of the kidney
• Renal vasoconstriction

Q7. Which renal cells can be influenced by sympathetic fibers to promote renin release?

• Juxtaglomerular cells
• Podocytes only
• Parietal cells of Bowman's capsule
• Urothelial cells of the renal pelvis

Q8. Why can visceral pain afferents travel within a nerve that is primarily described as sympathetic?

• Visceral pain is transmitted only by parasympathetic nerves
• Autonomic nerves can contain sympathetic efferents and visceral afferents together
• Pain fibers are converted into sympathetic efferents
• Every sympathetic fiber is also a somatic motor fiber

Q9. Which feature distinguishes the least splanchnic nerve from a typical gray ramus communicans?

• It carries only postganglionic fibers to body wall spinal nerves
• It carries preganglionic fibers toward abdominal prevertebral pathways
• It contains only somatic motor fibers
• It is entirely parasympathetic

Q10. Why should the least splanchnic nerve not be assumed to have an identical anatomy in every person?

• It is present only in children
• It always merges with the vagus nerve
• Its formation and presence show anatomical variation
• Its spinal cord origin changes between sympathetic and parasympathetic divisions