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  Normalization for sparse encoding of odors by a wide-field interneuron

Papadopoulou, M., Cassenaer, S., Nowotny, T., & Laurent, G. (2011). Normalization for sparse encoding of odors by a wide-field interneuron. Science, 332(6030), 721-725.

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Papadopoulou, M., Author
Cassenaer, S., Author
Nowotny, T., Author
Laurent, G.1, Author              
Affiliations:
1Neural systems Department, Max Planck Institute for Brain Research, Max Planck Society, ou_2461701              

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 Abstract: Sparse coding presents practical advantages for sensory representations and memory storage. In the insect olfactory system, the representation of general odors is dense in the antennal lobes but sparse in the mushroom bodies, only one synapse downstream. In locusts, this transformation relies on the oscillatory structure of antennal lobe output, feed-forward inhibitory circuits, intrinsic properties of mushroom body neurons, and connectivity between antennal lobe and mushroom bodies. Here we show the existence of a normalizing negative-feedback loop within the mushroom body to maintain sparse output over a wide range of input conditions. This loop consists of an identifiable "giant" nonspiking inhibitory interneuron with ubiquitous connectivity and graded release properties.

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Language(s): eng - English
 Dates: 2011
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: eDoc: 578784
ISI: 000290265800044
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Title: Science
Source Genre: Journal
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Pages: - Volume / Issue: 332 (6030) Sequence Number: - Start / End Page: 721 - 725 Identifier: ISSN: 0036-8075