Advanced Greater Splanchnic Nerve Quiz

Q1. Which pathway best describes a typical greater splanchnic sympathetic fiber supplying a foregut organ?

• Spinal cord to vagus nerve to celiac ganglion to somatic nerve
• Sacral spinal cord to pelvic splanchnic nerve to celiac ganglion
• Thoracic spinal cord to dorsal root ganglion to phrenic nerve
• Spinal cord to sympathetic trunk to greater splanchnic nerve to celiac ganglion to periarterial plexus

Q2. Why can sectioning the greater splanchnic nerve affect both autonomic function and visceral pain transmission?

• It contains only parasympathetic postganglionic fibers
• It carries only cutaneous sensory fibers
• It contains only somatic motor fibers
• It contains sympathetic efferents and accompanying visceral afferents

Q3. Why are the celiac ganglia considered prevertebral rather than paravertebral ganglia?

• They are located within dorsal root ganglia
• They lie inside the spinal cord
• They lie anterior to the vertebral column near the celiac trunk rather than within the sympathetic trunks
• They are intramural ganglia within the stomach wall

Q4. How can greater splanchnic visceral afferents contribute to referred pain?

• They enter only sacral spinal segments
• They converge with somatic afferent input at related thoracic spinal segments
• They bypass the spinal cord completely
• They transform into cutaneous nerves in the celiac ganglia

Q5. Why can greater splanchnic sympathetic output influence several different upper abdominal organs?

• Postganglionic fibers distribute through interconnected periarterial plexuses
• The nerve supplies only one fixed organ
• All fibers travel through the femoral canal
• The nerve directly enters every organ without branching

Q6. Which anatomical relationship explains the close functional association between the greater splanchnic nerve and the celiac plexus?

• It becomes the lumbar plexus after crossing the diaphragm
• It provides a major preganglionic sympathetic input to the celiac ganglia and plexus
• It forms the anterior vagal trunk
• It terminates in the inguinal canal

Q7. Why do preganglionic sympathetic fibers in the greater splanchnic nerve remain unsynapsed while traversing the sympathetic trunk?

• The sympathetic trunk contains no neurons
• They are already postganglionic fibers
• Their intended synapses are in abdominal prevertebral ganglia
• They must first become parasympathetic fibers

Q8. Which feature differentiates a typical greater splanchnic pathway from a sympathetic pathway to the body wall?

• Both pathways always synapse in dorsal root ganglia
• Visceral fibers use prevertebral ganglia, while body wall fibers commonly use paravertebral ganglia
• Greater splanchnic fibers are somatic motor fibers
• Body wall sympathetic fibers travel through the vagus nerve

Q9. Why is the segmental origin of the greater splanchnic nerve often described as approximate rather than absolutely fixed?

• The nerve changes from sympathetic to parasympathetic between individuals
• The exact thoracic ganglionic contributions show anatomical variation
• It originates from cranial nerves in some individuals
• It has no relationship to thoracic sympathetic ganglia

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

• It is a vagal branch that synapses in intramural ganglia
• It is a somatic motor branch of the lumbar plexus
• It is a sacral parasympathetic nerve supplying the hindgut
• It is a thoracic visceral nerve carrying sympathetic preganglionic fibers and visceral afferents toward the celiac prevertebral network