Journal
CURRENT OPINION IN NEUROBIOLOGY
Volume 35, Issue -, Pages 178-184Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.conb.2015.10.002
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Funding
- EMBO
- Sir Henry Wellcome Postdoctoral Fellowship
- Wellcome Trust
- Gatsby Charitable Foundation
- Oxford Martin School
- Bettencourt-Schueller Foundation
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Learning permits animals to attach meaning and context to sensory stimuli. How this information is coded in neural networks in the brain, and appropriately retrieved and utilized to guide behavior, is poorly understood. In the fruit fly olfactory memories of particular value are represented within sparse populations of odor-activated Kenyon cells (KCs) in the mushroom body ensemble. During learning reinforcing dopaminergic neurons skew the mushroom body network by driving zonally restricted plasticity at synaptic junctions between the KCs and subsets of the overall small collection of mushroom body output neurons. Reactivation of this skewed KC-output neuron network retrieves memory of odor valence and guides appropriate approach or avoidance behavior.
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