INVESTIGADORES
VALENTINUZZI veronica Sandra
congresos y reuniones científicas
Título:
PERFORMANCE OF CALLITHRIX JACCHUS IN A PLACE CONDITIONING TASK: TIME STAMP, DIURNAL AND SEASONAL MODULATION
Autor/es:
VALENTINUZZI VS ; NETO SPD; CARNEIRO BTS; SANTANA KS; ARAÚJO JF; RALPH MR
Lugar:
Natal, Brasil
Reunión:
Congreso; II Simpósio do Instituto Internacional de Neurociência de Natal-INNN; 2007
Institución organizadora:
Instituto Internacional de Neurociência de Natal
Resumen:
Learning in Marmosets was evaluated at two different times of the day, during two different  times of the year and using different training-testing intervals. In the place conditioning paradigm an animal learns to prefer a context (square or triangular), after it has been associated with a food reward. Twenty animals were used during the summer while another twenty during the winter.The animals were trained during 8 days in 10-min sessions, where one of the contexts always had a reward while the other did not. During each Experiment, half of the animals were trained in the morning and the other half in the afternoon (groups M and A). During testing, which consisted of  presenting the two contexts without a reward, half of the animals were tested at the same time of training (groups MM and AA) while the other half at the opposite time (AM and MA). During the summer experiments, we observed: 1) a temporal effect in the interaction with the contexts; afternoon animals explored more and, 2) the expression of time stamp, that is, only animals tested at the same time of training showed good performance. When the experiments were done in the winter neither of these effects were detected. These data show that time stamp also occurs in a non-human new world primate, that time of day can modulate behavior during certain phases of the learning process and that expression of these time modulations can be masked by seasonal conditions.