Journal of Comparative Physiology A

, Volume 199, Issue 11, pp 911–928

Mixture and odorant processing in the olfactory systems of insects: a comparative perspective

Authors

    • Department of BiologyUniversity of Washington
    • Department of BiologyUniversity of Washington
Review

DOI: 10.1007/s00359-013-0818-6

Cite this article as:
Clifford, M.R. & Riffell, J.A. J Comp Physiol A (2013) 199: 911. doi:10.1007/s00359-013-0818-6

Abstract

Natural olfactory stimuli are often complex mixtures of volatiles, of which the identities and ratios of constituents are important for odor-mediated behaviors. Despite this importance, the mechanism by which the olfactory system processes this complex information remains an area of active study. In this review, we describe recent progress in how odorants and mixtures are processed in the brain of insects. We use a comparative approach toward contrasting olfactory coding and the behavioral efficacy of mixtures in different insect species, and organize these topics around four sections: (1) Examples of the behavioral efficacy of odor mixtures and the olfactory environment; (2) mixture processing in the periphery; (3) mixture coding in the antennal lobe; and (4) evolutionary implications and adaptations for olfactory processing. We also include pertinent background information about the processing of individual odorants and comparative differences in wiring and anatomy, as these topics have been richly investigated and inform the processing of mixtures in the insect olfactory system. Finally, we describe exciting studies that have begun to elucidate the role of the processing of complex olfactory information in evolution and speciation.

Keywords

MixturesOlfactionAntennal lobeOlfactory coding

Abbreviations

AL

Antennal lobe

AN

Antennal nerve

GABA

γ-Aminobutyric acid

LH

Lateral horn of the protocerebrum

LN

Local interneuron

eLN

Excitatory local interneuron

iLN

Inhibitory local interneuron

MB

Mushroom bodies

MGC

Macroglomerular complex

OB

Olfactory bulb

OR

Olfactory receptor

OBP

Odorant binding protein

ORC

Olfactory receptor cell

PN

Projection neuron

Copyright information

© Springer-Verlag Berlin Heidelberg 2013