This study reports an anatomical and functional screen of mushroom body–extrinsic neurons in Drosophila and finds that MB-V2 cholinergic efferent neurons are essential for retrieval of aversive short- and long-term memory, but not for memory formation or consolidation. During memory retrieval, MB-V2 neurons reinforce the olfactory pathway involved in innate odor avoidance.
- Julien Séjourné
- Pierre-Yves Plaçais
- Thomas Preat