Resumen. MARTINEZ-MORENO, Alma Gabriela et al. Differential effects of conditioned taste aversion on sucrose and stevia intake. Rev. Mex. de trastor. aliment. Condicionamiento clásico a través de la aversión al sabor en animales. El paradigma de aprendizaje aversivo gustativo es el único que exhibe. Evaluación de la Nicotina como Estímulo Aversivo Por: Meraris Soto Juan C. Laureano Investigación realizada por: Hugo Sánchez-Castillo.

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Fimbriafornix cut affects spontaneous activity, two-way avoidance and delayed non matching to sample, but not latent inhibition. Since there is no clear evidence about the effects of this procedure on the consumption of sweeteners, the purpose of this study was to examine the effectiveness of Condiclonamiento to decrease the consumption of two natural sweeteners.

Preplexing effects of hippocampal lesions on latent inhibition: Objetivos del programa de la materia.

Post-training reversible inactivation of hippocampus reveals interference between memory systems. The behavioral procedure had five phases: Animal Learning and Behavior, 18, Buhusi, C.

Both enhanced and preserved functions codnicionamiento those deteriorated represent useful tools to study the ageing brain Hippocampus and taste memories The basic brain circuit required for CTA involves several brain areas, such as the nucleus of the solitary tract, the parabrachial nucleus, the insular gustatory cortex, and the amygdala for reviews see Bernstein, ; Gallo et al.

Journal of Neuroscience, 17, Smith, D. Involvement of catecholaminergic systems. Quarterly Journal of Experimental Psychology. The non-preexposed Ctrl groups drank at the same time as their corresponding preexposed group i. Consistently, Bonardi et al. This result can be explained by the possibility that aged rats have a compromised sense of the time of day, but this explanation is unlikely because Experiment 2 demonstrated that aged rats do use time of day to modulate the expression of conditioned taste aversion.


Alternatively, the difference between the response in the adult and sablr groups might be explained by an aging-related deficit in processing timeof-day cues.

Ensombrecimiento y potenciacion del condicionamiento de aversion al contexto. – Free Online Library

Journal of Neuroscience, 15 11Kehoe, P. This latter effect has been reported to be hippocampal dependent because NMDA lesions of the dorsal hippocampus disrupt it in young adult rats.

Journal of Neuroscience, 22 4Weiner, I. Ontogenetically, CTA is a primitive and early developing type of associative learning.

The increased neophobic response does not seem to be related to the enhanced saccharin aversion in aged rats because a Sham-operated animals were subjected to the same surgical procedure but vehicle 0. The hippocampus and contextual memory retrieval in Pavlovian conditioning. Physiological Research, 51 Suppl 1, S S Condicilnamiento this segregation perspective may help to account for why aging and hippocampal dysfunction compromise episodic memory ability.

Adult rats DIFF that drank saline at an unfamiliar time-of-day learned a greater saline aversion than adult rats SAME that drank the saline at a familiar time of day.


Chemical Senses, 30 Suppl 1ii Importantly, prior to conditioning, the groups had a similar saline preference. Besides basic aversive and safe memories that condiiconamiento on the consequences of ingesting novel tastes, the development of taste memories in daily life is profoundly modulated by previous and other ongoing experiences with the same or different tastes.

Although a diminished habituation of grape juice neophobia in aged rats has been reported Gallagher and Burwell,we have found similar habituation of neophobia in adult and aged rats using a low condicionamiwnto 0. This contextual cue attributed to a change in the time of day may reveal a temporal specificity of condicionamienti inhibition.


Thus, taste learning and memory tasks reveal a complex but complete picture of ageing as inducing a different organization of the learning abilities instead of mere decay. Physiology and Behavior, 61, Misanin, J.

Ensombrecimiento y potenciacion del condicionamiento de aversion al contexto.

Fetal associative learning mediated through maternal alcohol intoxication. The results ssabor no effect of a temporal context shift both in PN24 and PN The emergence of latent inhibition of CTA seems to be dependent on the number of preexposures, among other parameters of the behavioural procedure.

During the first 3 days all the animals drank water ad libitum during the morning and evening sessions. As a consequence, the taste becomes aversive inducing orofacial aversive reactions and being avoided in later presentations.

Una ventana a la libertad: Hippocampus, 16, Squire, L. Gabriela Ruiz Torres Lic. Rudy and Cheatle reported aversions in 8-day-old rat pups exposed to an odour-lithium chloride pairing at the age of two days.

Developmental Psychobiology, 40 2Molina J. Time of day-dependent latent inhibition of conditioned taste aversions in rats Abstract Condicionamientto Materials and methods Results Discussion References Chapter 4. Neonatal rats are able to learn odour and taste aversions. Moreover, the aged hippocampus shows alterations in different forms of plasticity. Aged rats but not young adult rats show aversions irrespective of the context in which they were kept during the interstimulus interval Misanin and Hinderlitter, This indicates that while aged rats acquire conditioned taste aversions of a magnitude like adult rats, they failed to express the aversion differentially as a function of the time of day.