Olfactory coding in the insect brain : data and conjectures

Galizia, C. Giovanni

Olfactory coding in the insect brain : data and conjectures

Files

Galizia_284825.pdf(1.56 MB)

Date

2014

Publication type

Journal article

Published in

European Journal of Neuroscience ; 39 (2014), 11. - pp. 1784-1795. - ISSN 0953-816X. - eISSN 1460-9568

Abstract

Much progress has been made recently in understanding how olfactory coding works in insect brains. Here, I propose a wiring diagram for the major steps from the first processing network (the antennal lobe) to behavioral readout. I argue that the sequence of lateral inhibition in the antennal lobe, non-linear synapses, threshold-regulating gated spring network, selective lateral inhibitory networks across glomeruli, and feedforward inhibition to the lateral protocerebrum cover most of the experimental results from different research groups and model species. I propose that the main difference between mushroom bodies and the lateral protocerebrum is not about learned vs. innate behavior. Rather, mushroom bodies perform odor identification, whereas the lateral protocerebrum performs odor evaluation (both learned and innate). I discuss the concepts of labeled line and combinatorial coding and postulate that, under restrictive experimental conditions, these networks lead to an apparent existence of "labeled line" coding for special odors. Modulatory networks are proposed as switches between different evaluating systems in the lateral protocerebrum. A review of experimental data and theoretical conjectures both contribute to this synthesis, creating new hypotheses for future research.

Subject (DDC)

570 Biosciences, Biology

Keywords

Antennal lobe,mushroom bodies,neural networks,sensory coding

Cite This

ISO 690

GALIZIA, C. Giovanni, 2014. Olfactory coding in the insect brain : data and conjectures. In: European Journal of Neuroscience. 39(11), pp. 1784-1795. ISSN 0953-816X. eISSN 1460-9568. Available under: doi: 10.1111/ejn.12558

BibTex

@article{Galizia2014-06Olfac-28482,
  year={2014},
  doi={10.1111/ejn.12558},
  title={Olfactory coding in the insect brain : data and conjectures},
  number={11},
  volume={39},
  issn={0953-816X},
  journal={European Journal of Neuroscience},
  pages={1784--1795},
  author={Galizia, C. Giovanni}
}

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