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Chemical Senses Advance Access published online on August 16, 2006
Chemical Senses, doi:10.1093/chemse/bjl023
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© The Author 2006. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org
Accepted July 25, 2006

Article

Taste Memory Formation: Role of Nucleus Accumbens

Leticia Ramírez-Lugo 1, Luis Núñez-Jaramillo 1, and Federico Bermúdez-Rattoni 1 *

1 Departamento de Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Apartado Postal 70-253, 04510 México, DF, México

* To whom correspondence should be addressed.
Federico Bermúdez-Rattoni, E-mail: fbermude{at}ifc.unam.mx


  Abstract

When a novel taste has been associated with postingestive malaise, animals recognize this taste as aversive. This associative learning is known as conditioned taste aversion. However, when an animal consumes a novel taste and no aversive consequences follow, it becomes recognized as a safe signal, leading to an increase in its consumption in subsequent presentations. In this review, we will discuss the results related to the taste memory formation focusing particularly on the nucleus accumbens (NAcc). The NAcc keeps projections with amygdala, insular cortex, parabrachial nucleus, and nucleus of the solitary tract areas important for taste memory formation. We will review the evidence relating to how the NAcc could be involved in taste memory formation, due to its role in the taste memory trace formation and its role in the association of the conditioned stimulus-unconditioned stimulus, and finally the retrieval of taste memory. In this context, we will review the participation of the cholinergic, dopaminergic, and glutamatergic systems in the NAcc during taste memory formation.

Keywords: learning; memory formation; nucleus accumbens; taste memory trace.
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