Gallo M, Bielavska E, Roldán G, Bures J
Department of Experimental Psychology and Physiology of Behavior, University of Granada, Campus Cartuja, Spain.
Neurosci Lett. 1998 Jan 9;240(2):61-4. doi: 10.1016/s0304-3940(97)00897-5.
The effect of the non-competitive N-methyl-D-aspartate (NMDA) receptor antagonist ketamine on latent inhibition of taste aversion learning was studied in rats. Systemic injections of ketamine (50 mg/kg) applied after each of three preexposures to sodium saccharin (0.1%) disrupted the latent inhibition effect. The blockade was not due to aversive properties of ketamine, because three saccharin-ketamine pairings did not produce saccharin aversion. Moreover, the ketamine-induced blockade of latent inhibition was disrupted by tetrodotoxin injections (10 ng/microl)-induced reversible inactivation of gustatory cortex, applied after each preexposure. A specific gustatory cortex mediation of the ketamine effect is discussed.
