The celiac plexus (solar plexus) receives input from preganglionic sympathetic fibers traveling via which nerves?

• A Pelvic splanchnic nerves (S2–S4)
• B Lumbar splanchnic nerves (L1–L2) only
• C Vagus nerve (CN X) carrying sympathetic preganglionic fibers
• D Greater, lesser, and least splanchnic nerves (T5–T12 preganglionics) ✓

Explanation

The celiac plexus receives preganglionic sympathetic fibers from the greater splanchnic nerve (T5–T9), lesser splanchnic nerve (T10–T11), and least splanchnic nerve (T12). These pass through the diaphragm and synapse in the celiac ganglion. The plexus also receives parasympathetic fibers from the vagus nerve (which pass through without synapsing — vagal parasympathetic synapses occur in the gut wall). Pelvic splanchnic nerves (S2–S4) supply pelvic organs parasympathetically. Lumbar splanchnic nerves supply pelvic sympathetic plexuses.

Reference: BD Chaurasia's Human Anatomy, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.