A 38 year old woman with peptic ulcer disease of the duodenum experiences severe abdominal pain. Which of the following nervous structures is most likely involved?: (A) Greater splanchnic nerve, (B) Ventral roots of the spinal nerve, (C) Lower intercostal nerve, (D) Lesser splanchnic nerve
Answer is A. Foregut: (Duodenum) sympathetic supply - greater splanchnic nerve which carries pain sensation as well parasympathetic - vagus. Midgut: sympathetic supply - lesser splanchnic nerve, parasympathetic - vagus. Hind gut: sympathetic- least splanchnic nerve, parasympathetic - pelvic splanchnic nerve.