Abstract
Bilateral subdiaphragmatic vagotomy in rats did not prevent subsequent acquisition of a conditioned taste aversion in a two-bottle preference paradigm. Neither verified-vagotomized nor sham-vagotomized animals shifted their preference when presentation of the preferred fluid was immediately followed by injection of isotonic NaCl, whereas both surgical groups shifted their preference to the initially-nonpreferred fluid when presentation of the initially-preferred fluid was followed by injection of isotonic LiCl. Although these results do not preclude some involvement of vagal innervation in toxiphobia conditioning in combination with other neural systems, they do indicate that the role of the vagus nerves is not a major one.
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