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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Evaluación de la Nicotina como Estímulo Aversivo by meraris soto on Prezi

Neural plasticity and memory: Los mecanismos cerebrales de algunos fenomenos complejos de aprendizaje como por ejemplo la inhibicion latente pueden variar, e incluso ser independientes, en funcion del procedimiento empleado. If aged rats have an impaired sense of time of day, then with a hippocampal lesion they should not express learned saline aversions that are modulated by the time of day the saline was tasted.

Dorsal hippocampal lesions did not interfere with the effect of a time change in the short-habituation procedure Gallo, Behavioral Neuroscience,Rapp, P. The increased neophobic response does not seem to be related to the enhanced saccharin aversion in aged rats because a However, the hippocampus may have Subtle modifications of the procedure seem to drastically modify the role of the temporal context. Memory and the hippocanmpus: Although it has been proposed that a single pairing might not be sufficient for establishing the context as a conditional cue controlling the CS US association Bonardi et al.

Furthermore, additional extinction tests revealed the opposite difference unpublished data. The rat fetus in its environment: Latent inhibition with a response time measure from a within-subject desing: Latent inhibition was absent in the group preexposed and conditioned to saline at different times of the day, but not in the group that was preexposed and conditioned at the same time of day. Mente y Cerebro, 11, Manrique, T.

Both enhanced and preserved functions besides 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.


The main criticism concerns the fact that some of these tasks may involve sensory, motor, and motivational requirements that may decline during ageing, Thus, a worse performance in a learning and memory task by old-age rats compared with young adult rats could have several interpretations, not necessarily related to the hippocampal involvement in learning and memory.

En primer lugar, debe emplear modalidades estimulares que exhiban un desarrollo tan temprano como sea posible.

Rather the change of time of day may have favoured the CS US association during conditioning, either by Experimental Gerontology, 38Franchina, J. Novelty of contextual cues in taste aversion learning. Psychobiology, 16 2Rudy, J. Revisiting the maturation of media temporal lobe memory functions in primates.

La ausencia de efecto del cambio de hora en ratas Three days after birth each litter was culled to ten pups being the males always preserved and housed with their dams in standard clear polyethylene hanging cages.

Reviews Neuroscience, 15, Klein, S. Alternatively, the difference between the response in the adult and aged groups might be explained by an aging-related deficit in processing timeof-day cues.

Age differences in the potentiation of taste aversion by odor cues.


Psychological Review, 79, Carman, H. Journal of Neuroscience, 22 4Weiner, I.

It has been proposed that the time-of-day acts as contextual stimulus in these tasks Lukoyanov et al. Note, we used an asymmetric experimental design with saline preexposure occurring only in the evenings. Nothing psychological is strange to us.

Some of the effects of dorsal hippocampal lesions in adult rats are also seen in aged rats. Hull, una Nueva Mirada. Hippocampus, ageing and taste memories. Blocking consists of a reduced conditioning of a taste if it is presented during the conditioning trial in compound with a second taste that had Although the habituation period to spatial contexts is a determinant variable for the spatial specificity of latent inhibition of CTA, the influence of contextual-temporal familiarity time of day on latent inhibition of CTA has not been explored through direct comparisons between different periods of habituation to the temporal context.


Nature Neurosciences, 6, Saksida, L. Sham-operated animals were subjected to the same surgical procedure but vehicle 0. Context may also modulate CTA. A behavioral assessment of hippocampal function based on a subregional analysis.

The experimental preexposed group showed weaker saline aversions than the control nonpreexposed group, as demonstrated by a higher saline intake in a one-bottle test It therefore appears that aged rats can use the time of day in representations of experience but that their ability to encode, maintain or use segregated representations of non-spatial experience is different from this ability in adult rats.

First Cindicionamiento Conference of Cheiron. Even if the aged rats behave as young adults in cued or visible platform control sxbor of the task, lower visual in the control tasks compared with those requiring processing of several environmental distal cues in the experimental task cannot be excluded.

Nature Reviews Neuroscience, 5, Bernstein, I. Reviews in Neurosciences, 6, Squire, L. Both aged and hippocampal adult rats show an intact LI effect. Analysis of the importance of controllable versus uncontrollable stress on subsequent behavioral and physiological functioning. In all, the results indicate a peculiar organization of the memory systems during aging that cannot be explained by a general cognitive decline or exclusively by the decay of the hippocampal function. El Conexionismo de Thorndike.

During the first 3 days all the animals drank water ad libitum during the morning and evening sessions.