Advanced Lesser Splanchnic Nerve Quiz

Q1. Which pathway best describes a typical preganglionic sympathetic fiber traveling in the lesser splanchnic nerve?

• Sacral spinal cord to pelvic splanchnic nerve to thoracic sympathetic trunk
• Spinal cord to white ramus to sympathetic trunk to lesser splanchnic nerve to prevertebral ganglion
• Lumbar plexus to phrenic nerve to celiac ganglion
• Spinal cord to dorsal root ganglion to vagus nerve to abdominal organ

Q2. Why is the lesser splanchnic nerve associated with more than one abdominal autonomic territory?

• It terminates only in a dorsal root ganglion
• It contributes to interconnected aorticorenal and superior mesenteric autonomic networks
• It is confined entirely to the thorax
• It directly supplies only one skeletal muscle

Q3. Which feature best distinguishes the lesser splanchnic nerve from the greater splanchnic nerve?

• It is parasympathetic while the greater nerve is sympathetic
• It usually arises from T10 to T11 and has stronger aorticorenal and superior mesenteric associations
• It originates from the sacral spinal cord
• It is a branch of the vagus nerve

Q4. How can visceral afferents in the lesser splanchnic pathway contribute to referred abdominal pain?

• Pain fibers synapse only in prevertebral ganglia
• The lesser splanchnic nerve directly becomes a cutaneous nerve
• All visceral pain bypasses the spinal cord
• Visceral and somatic afferent inputs converge at related spinal segments

Q5. Why can sympathetic fibers reaching the superior mesenteric plexus influence multiple midgut organs?

• All fibers remain inside the superior mesenteric ganglion
• Periarterial fibers can follow branches of the superior mesenteric artery to multiple organs
• Midgut organs receive only somatic innervation
• The nerve enters every organ directly without branching

Q6. How does the lesser splanchnic nerve illustrate the distinction between paravertebral and prevertebral sympathetic ganglia?

• It contains only postganglionic fibers from paravertebral ganglia
• It passes through paravertebral ganglia before reaching prevertebral synaptic sites
• It synapses only in dorsal root ganglia
• It bypasses all sympathetic ganglia

Q7. Why are periarterial plexuses important after lesser splanchnic fibers relay in abdominal ganglia?

• They supply only skeletal muscle
• They prevent autonomic fibers from reaching organs
• They distribute postganglionic fibers along arterial routes to target viscera
• They transport sympathetic neuron cell bodies in the arterial lumen

Q8. Which finding would be compatible with normal anatomical variation of the lesser splanchnic nerve?

• Complete replacement of the sympathetic trunk
• Variation in contributing thoracic levels or connections
• Conversion into a parasympathetic cranial nerve
• Origin from the sacral plexus

Q9. How does the lesser splanchnic nerve differ from the least splanchnic nerve in the usual segmental pattern?

• The lesser is cranial, while the least is sacral
• The lesser usually arises from T10 to T11, while the least usually arises from T12
• The lesser arises from S2 to S4, while the least arises from C1
• Both arise exclusively from T5 to T9

Q10. Which statement best integrates the anatomy of the lesser splanchnic nerve?

• It is a T10 to T11 sympathetic visceral pathway associated with aorticorenal and superior mesenteric networks
• It is a somatic motor branch of the lumbar plexus
• It is a sacral parasympathetic nerve supplying the hindgut
• It is a vagal branch supplying only the stomach