Cited by 359Neurobiology and Insect Physiology ResearchNeuroscience and Neuropharmacology ResearchOlfactory and Sensory Function Studies

Excitatory Local Circuits and Their Implications for Olfactory Processing in the Fly Antennal Lobe

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Shang, Yuhua, Claridge-Chang, Adam, Sjulson, Lucas, Pypaert, Marc, Miesenböck, Gero·2007·Cell

Abstract

Conflicting views exist of how circuits of the antennal lobe, the insect equivalent of the olfactory bulb, translate input from olfactory receptor neurons (ORNs) into projection-neuron (PN) output. Synaptic connections between ORNs and PNs are one-to-one, yet PNs are more broadly tuned to odors than ORNs. The basis for this difference in receptive range remains unknown. Analyzing a Drosophila mutant lacking ORN input to one glomerulus, we show that some of the apparent complexity in the antennal lobe's output arises from lateral, interglomerular excitation of PNs. We describe a previously unidentified population of cholinergic local neurons (LNs) with multiglomerular processes. These excitatory LNs respond broadly to odors but exhibit little glomerular specificity in their synaptic output, suggesting that PNs are driven by a combination of glomerulus-specific ORN afferents and diffuse LN excitation. Lateral excitation may boost PN signals and enhance their transmission to third-order neurons in a mechanism akin to stochastic resonance.

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Crossref · 10.1016/j.cell.2006.12.034

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Authors
Shang, Y., Claridge-Chang, A., Sjulson, L., Pypaert, M., & Miesenböck, G.
Affiliations
Yale University (US)
Corresponding author
Miesenböck, Gero
Venue
Cell
Publisher
Elsevier BV
Published
2007-02
Volume
128
Issue
3
Pages
601-612
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2073936984
Cited by
359
References
56
Citations by year
2026: 5 · 2025: 5 · 2024: 15 · 2023: 19 · 2022: 7 · 2021: 24 · 2020: 10 · 2019: 13 · 2018: 8 · 2017: 11 · 2016: 16 · 2015: 16 · 2014: 21 · 2013: 15 · 2012: 25
FWCI
16.32
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute on Deafness and Other Communication Disorders (R01DC005810)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Sensory Systems › Olfactory and Sensory Function Studies
Keywords
antennal lobe, olfactory processing, Drosophila, olfactory sensory neurons, projection neurons, local circuits, stochastic resonance
MeSH terms
Acetylcholine, Animals, Brain, Drosophila, Nerve Net, Neurons, Afferent, Odorants, Smell, Synapses, Olfactory Receptor Neurons, Receptors, Odorant, Drosophila Proteins

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