What may cause inflammation of the vagal nerve leading to Type 2 vagal indigestion?

• A. Peritonitis in cranial abdomen and adhesions
• B. Straining during calving
• C. Ingestion of excess salt
• D. Seasonal balanoposthitis

Answer: (A)

Vagal indigestion results when the vagus nerve, which supplies the forestomachs and the abomasum, is disturbed so that normal motility is lost. Type 2 vagal indigestion is specifically linked to inflammation or irritation of the vagal nerve in the cranial abdomen, where the nerve trunks run near the digestive organs. Peritonitis in that area with adhesions can irritate or injure the vagus, disrupting its parasympathetic control and producing the motility problems characteristic of this type.

So the cranial-abdominal inflammatory process directly involving the vagus nerve is the mechanism behind this form of vagal indigestion, which is why peritonitis with adhesions is the most fitting cause among the options. The other choices don’t involve inflammation or irritation of the vagus nerve in the cranial abdomen, and thus don’t explain the neural basis of Type 2 vagal indigestion.