Olfactory learning skews mushroom body output pathways to steer behavioral choice in Drosophila

Highlights • Dopamine neurons coding opposite value are segregated in the fly brain.• Dopamine neurons representing reward type innervate discrete mushroom body areas.• Mushroom body output neurons are specific to dopaminergic reinforcement zones.• Olfactory learning skews different collections of mushroom body output junctions.• Mushroom bodies are fan-out fan-in circuits like the cerebellum and hippocampus.

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