The Organization of Projections from Olfactory Glomeruli onto Higher-Order Neurons.
The Organization of Projections from Olfactory Glomeruli onto Higher-Order Neurons.
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DOI:
10.1016/j.neuron.2018.05.011
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发表时间:
2018-06-27
期刊:
影响因子:
16.2
通讯作者:
Wilson RI
中科院分区:
文献类型:
--
作者:
Jeanne JM;Fişek M;Wilson RI
Each odorant receptor corresponds to a unique glomerulus in the brain. Projections from different glomeruli then converge in higher brain regions, but we do not understand the logic governing which glomeruli converge and which do not. Here we use two-photon optogenetics to map glomerular connections onto neurons in the lateral horn, the region of the Drosophila brain which receives the majority of olfactory projections. We identify 39 morphological types of lateral horn neurons (LHNs) and show that different types receive input from different combinations of glomeruli. We find that different LHN types do not have independent inputs; rather, certain combinations of glomeruli converge onto many of the same LHNs and so are overrepresented. Notably, many overrepresented combinations are composed of glomeruli that prefer chemically-dissimilar ligands whose co-occurrence indicates a behaviorally-relevant “odor scene”. The pattern of glomerulus-LHN connections thus represents a prediction of what ligand combinations will be most salient. Jeanne et al. use two-photon optogenetics to map connections from olfactory glomeruli onto lateral horn neurons in Drosophila. Certain combinations of glomeruli are overrepresented. These are not similarly-tuned glomeruli; rather, they are glomeruli whose co-activation signals a salient “odor scene”.
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