IFIBYNE   05513
INSTITUTO DE FISIOLOGIA, BIOLOGIA MOLECULAR Y NEUROCIENCIAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Experience-dependent tuning of olfactory percetion
Autor/es:
MARACHLIAN EMILIANO; FERNANDO LOCATELLI
Lugar:
Sapporo
Reunión:
Congreso; Internationa Conference for Neuroethology; 2014
Institución organizadora:
International Society for Neuroethology
Resumen:
Natural olfactory stimuli to which animals are exposed are normally complex and variable mixtures. The meaning and significance of the different components may change and the animals have to keep their olfactory sense adjusted to detect relevant odors. We asked if component detection is adjusted by experience–dependent plasticity in the olfactory processing in the antennal lobe. We performed calcium imaging in projections neurons of the honey bee antennal lobe and measured the neural representation of mixtures and pure components in naïve and in olfactory trained honey bees. Then we established algorithms that allow prediction of the pattern elicited by the mixture based on the patterns elicited by the pure components. We found that the way in which the pure components are combined to produce the representation of the mixture depends on the previous olfactory experience. The representation of the mixtures is biased toward the representation of the learned component  and away from the background component. The effect is evidenced by a reduction in elements that encode the background odor, suggesting that the shift in the representation of the mixture is provided by strengthening of inhibitory interactions. The relevance of this mechanism is evaluated in behavioral experiments.