Rxivist logo

Internal state configures olfactory behavior and early sensory processing in Drosophila larvae

By Katrin Vogt, David M. Zimmerman, Matthias Schlichting, Luis Hernandez-Nunez, Shanshan Qin, Karen Malacon, Michael Rosbash, Cengiz Pehlevan, Albert Cardona, Aravinthan D.T. Samuel

Posted 02 Mar 2020
bioRxiv DOI: 10.1101/2020.03.02.973941

Animals exhibit different behavioral responses to the same sensory cue depending on their state at a given moment in time. How and where in the brain are sensory inputs combined with internal state information to select an appropriate behavior? Here we investigate how food deprivation affects olfactory behavior in Drosophila larvae. We find that certain odors reliably repel well-fed animals but attract food-deprived animals. We show that feeding state flexibly alters neural processing in the first olfactory center, the antennal lobe. Food deprivation differentially modulates two separate output pathways that are required for opposing behavioral responses. Uniglomerular projection neurons mediate odor attraction and show elevated odor-evoked activity in the food-deprived state. A multiglomerular projection neuron mediates odor aversion and receives odor-evoked inhibition in the food-deprived state. The switch between these two pathways is regulated by the lone serotonergic neuron in the antennal lobe, CSD. Our findings demonstrate how flexible behaviors can arise from state-dependent circuit dynamics in an early sensory processing center. ### Competing Interest Statement The authors have declared no competing interest.

Download data

  • Downloaded 1,312 times
  • Download rankings, all-time:
    • Site-wide: 8,623 out of 101,349
    • In neuroscience: 1,305 out of 18,061
  • Year to date:
    • Site-wide: 1,757 out of 101,349
  • Since beginning of last month:
    • Site-wide: 2,397 out of 101,349

Altmetric data

Downloads over time

Distribution of downloads per paper, site-wide


Sign up for the Rxivist weekly newsletter! (Click here for more details.)


  • 20 Oct 2020: Support for sorting preprints using Twitter activity has been removed, at least temporarily, until a new source of social media activity data becomes available.
  • 18 Dec 2019: We're pleased to announce PanLingua, a new tool that enables you to search for machine-translated bioRxiv preprints using more than 100 different languages.
  • 21 May 2019: PLOS Biology has published a community page about Rxivist.org and its design.
  • 10 May 2019: The paper analyzing the Rxivist dataset has been published at eLife.
  • 1 Mar 2019: We now have summary statistics about bioRxiv downloads and submissions.
  • 8 Feb 2019: Data from Altmetric is now available on the Rxivist details page for every preprint. Look for the "donut" under the download metrics.
  • 30 Jan 2019: preLights has featured the Rxivist preprint and written about our findings.
  • 22 Jan 2019: Nature just published an article about Rxivist and our data.
  • 13 Jan 2019: The Rxivist preprint is live!