Taste-potentiated odor conditioning: impairment produced by infusion of an N-methyl-D-aspartate antagonist into basolateral amygdala.
Two experiments examined the effects of infusing an N-methyl-D-aspartate (NMDA) receptor antagonist, d-2-amino-5-phosphonovalerate(d-APV), on taste-potentiated odor conditioning: a form of learning that is dependent on information processing in 2 sensory modalities. In Experiment 1, rats infused with d-APV were impaired in their acquisition of the potentiated learning to an odor cue. Expression of this learning and acquisition of a simple taste aversion remained intact following drug treatment. In Experiment 2, dose dependence and stereoselectivity were demonstrated for the antagonist compound. These results are consistent with previous studies demonstrating that either basolateral amygdala lesions, or treatment with NMDA antagonists, by other routes (systemic or intraventricular) produce selective deficits in taste-potentiated odor conditioning.
Hatfield
T
T
Department of Psychology, University of North Carolina, Chapel Hill 27599-3270, USA.
Gallagher
M
M
D015763:2-Amino-5-phosphonovalerate / Q000494:pharmacology*; D000679:Amygdala / Q000187:drug effects*; D000818:Animals; D001245:Association Learning / Q000187:drug effects; D001362:Avoidance Learning / Q000187:drug effects; D001931:Brain Mapping; D003214:Conditioning, Classical / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D018691:Excitatory Amino Acid Antagonists / Q000494:pharmacology*; D007276:Injections, Intraventricular; D017774:Long-Term Potentiation / Q000187:drug effects; D008297:Male; D011939:Mental Recall / Q000187:drug effects; D051381:Rats; D016194:Receptors, N-Methyl-D-Aspartate / Q000037:antagonists & inhibitors*; D012903:Smell / Q000187:drug effects*; D013649:Taste / Q000187:drug effects*
D018691:Excitatory Amino Acid Antagonists; D016194:Receptors, N-Methyl-D-Aspartate; D015763:2-Amino-5-phosphonovalerate