Brief sensory experience differentially affects the volume of olfactory brain centres in a moth - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Cell and Tissue Research Année : 2016

Brief sensory experience differentially affects the volume of olfactory brain centres in a moth

Résumé

Experience modifies behaviour in animals so that they adapt to their environment. In male noctuid moths, Spodoptera littoralis, brief pre-exposure to various behaviourally relevant sensory signals modifies subsequent behaviour towards the same or different sensory modalities. Correlated with a behavioural increase in responses of male moths to the female-emitted sex pheromone after pre-exposure to olfactory, acoustic or gustatory stimuli, an increase in sensitivity of olfactory neurons within the primary olfactory centre, the antennal lobe, is found for olfactory and acoustic stimuli, but not for gustatory stimuli. Here, we investigated whether anatomical changes occurring in the antennal lobes and in the mushroom bodies (the secondary olfactory centres) possibly correlated with the changes observed in behaviour and in olfactory neuron physiology. Our results showed that significant volume changes occurred in glomeruli (olfactory units) responsive to sex pheromone following exposure to both pheromone and predator sounds. The volume of the mushroom body input region (calyx) also increased significantly after pheromone and predator sound treatment. However, we found no changes in the volume of antennal lobe glomeruli or of the mushroom body calyx after pre-exposure to sucrose. These findings show a relationship of antennal lobe sensitivity changes to the pheromone with changes in the volume of the related glomeruli and the output area of antennal lobe projection neurons elicited by sensory cues causing a behavioural change. Behavioural changes observed after sucrose pre-exposure must originate from changes in higher integration centres in the brain.

Fichier non déposé

Dates et versions

hal-01392617 , version 1 (04-11-2016)

Identifiants

Citer

Sylvia Anton, Marie-Ange Chabaud, Daniela Schmidt-Büsser, Bruno Gadenne, Javaid Iqbal, et al.. Brief sensory experience differentially affects the volume of olfactory brain centres in a moth. Cell and Tissue Research, 2016, 364 (1), pp.59-65. ⟨10.1007/s00441-015-2299-0⟩. ⟨hal-01392617⟩
156 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More