A Combined Perceptual, Physico-Chemical, and Imaging Approach to ‘Odour-Distances’ Suggests a Categorizing Function of the Drosophila Antennal Lobe - Archive ouverte HAL
Article Dans Une Revue PLoS ONE Année : 2011

A Combined Perceptual, Physico-Chemical, and Imaging Approach to ‘Odour-Distances’ Suggests a Categorizing Function of the Drosophila Antennal Lobe

Thomas Niewalda
  • Fonction : Auteur
Thomas Völler
  • Fonction : Auteur
Julia Ehmer
  • Fonction : Auteur
Wen-Chuang Chou
  • Fonction : Auteur
Marc Timme
  • Fonction : Auteur
André Fiala
  • Fonction : Auteur
Bertram Gerber
  • Fonction : Auteur

Résumé

How do physico-chemical stimulus features, perception, and physiology relate? Given the multi-layered and parallel architecture of brains, the question specifically is where physiological activity patterns correspond to stimulus features and/or perception. Perceived distances between six odour pairs are defined behaviourally from four independent odour recognition tasks. We find that, in register with the physico-chemical distances of these odours, perceived distances for 3-octanol and n-amylacetate are consistently smallest in all four tasks, while the other five odour pairs are about equally distinct. Optical imaging in the antennal lobe, using a calcium sensor transgenically expressed in only first-order sensory or only second-order olfactory projection neurons, reveals that 3-octanol and n-amylacetate are distinctly represented in sensory neurons, but appear merged in projection neurons. These results may suggest that within-antennal lobe processing funnels sensory signals into behaviourally meaningful categories, in register with the physico-chemical relatedness of the odours.

Dates et versions

hal-04193696 , version 1 (01-09-2023)

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Citer

Thomas Niewalda, Thomas Völler, Claire Eschbach, Julia Ehmer, Wen-Chuang Chou, et al.. A Combined Perceptual, Physico-Chemical, and Imaging Approach to ‘Odour-Distances’ Suggests a Categorizing Function of the Drosophila Antennal Lobe. PLoS ONE, 2011, 6 (9), pp.e24300. ⟨10.1371/journal.pone.0024300⟩. ⟨hal-04193696⟩
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