A cause of type 3 vagal indigestion is

• A. Inflammation of the vagal nerve
• B. Peritonitis
• C. Abomasal ulceration
• D. Volvulus/Displacement of abomasum

Answer: (A)

Type III vagal indigestion arises when the vagus nerve’s control of the abomasum is disrupted, most classically from inflammation of the vagal nerve. This neuritis impairs parasympathetic motility and the normal outflow from the abomasum, so the abomasum fails to empty properly and becomes distended in a functional obstruction pattern. Because the problem is a loss of neural input to abomasal movements, the hallmark signs reflect a motor failure rather than a mechanical blockage. Other conditions like peritonitis, abomasal ulcers, or volvulus/displacement can cause abdominal distress or similar signs, but they involve different pathophysiology and do not specifically produce the vagal motor dysfunction seen in this type of indigestion.