1. Vagal Afferent neurons are present within the body and caudal pole of the nodose ganglion from which vagal Afferent fibers innervating the abdominal viscera originate (Dockray and Sharkey, 1986; Green and Dockray, 1987, 1988; Sharkey and Williams, 1983).The rat nodose ganglion is composed of about 6000 neurons (Cooper, 1984).1