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Updated: May 8, 2026
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Drosophila Passive Avoidance Behavior as a New Paradigm to Study Associative Aversive Learning
Published on: October 15, 2021
Different kenyon cell populations drive learned approach and avoidance in Drosophila
Emmanuel Perisse1, Yan Yin, Andrew C Lin
1Centre for Neural Circuits and Behaviour, The University of Oxford, Tinsley Building, Mansfield Road, Oxford OX1 3SR, UK; Department of Neurobiology, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA 01605, USA.
Neuron
|September 10, 2013
Summary
Drosophila mushroom body (MB) core neurons (αβc) are crucial for appetitive memory, while surface neurons (αβs) handle both appetitive and aversive memory retrieval. This reveals a value-specific organization in olfactory learning.
Area of Science:
- Neuroscience
- Animal Behavior
- Molecular Biology
Background:
- Dopamine neurons in Drosophila's mushroom body (MB) process odor valence.
- Distinct MB neuron subsets have temporal roles in memory, but valence organization is unclear.
Purpose of the Study:
- To functionally subdivide Drosophila αβ neurons and identify their roles in olfactory memory valence.
- To investigate the organization of valence-specific information within the MB.
Main Methods:
- Functional subdivision of Drosophila αβ neurons.
- Neurotransmission blocking experiments targeting αβ surface (αβs) and αβ core (αβc) neurons.
- Analysis of memory retrieval in aversive and appetitive paradigms.
Main Results:
- αβs neurons are required for retrieving both aversive and appetitive memories.
- αβc neurons are specifically required for appetitive memory and relative valuation.
- Differential innervation of αβc and αβs by dopamine neurons and efferent pathways was observed.
Conclusions:
- Drosophila αβ neurons exhibit value-specific organization, with αβc for appetitive and αβs for both memory types.
- Conditioned approach behavior requires broad αβ ensemble output, while aversion relies on αβs output.
- This study elucidates the neural basis of valence processing and differential memory recall in Drosophila.
