Differential odor processing in two olfactory pathways in the honeybee

Nobuhiro Yamagata, Michael Schmuker, Paul Szyszka, Makoto Mizunami, Randolf Menzel

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

An important component in understanding central olfactory processing and coding in the insect brain relates to the characterization of the functional divisions between morphologically distinct types of projection neurons (PN). Using calcium imaging, we investigated how the identity, concentration and mixtures of odors are represented in axon terminals (boutons) of two types of PNs - lPN and mPN. In lPN boutons we found less concentration dependence, narrow tuning profiles at a high concentration, which may be optimized for fine, concentration-invariant odor discrimination. In mPN boutons, however, we found clear rising concentration dependence, broader tuning profiles at a high concentration, which may be optimized for concentration coding. In addition, we found more mixture suppression in lPNs than in mPNs, indicating lPNs better adaptation for synthetic mixture processing. These results suggest a functional division of odor processing in both PN types.

Original languageEnglish
Article number16
JournalFrontiers in Systems Neuroscience
Volume3
Issue numberDEC
DOIs
Publication statusPublished - 2009 Dec 4

Keywords

  • Calcium imaging
  • Functional division
  • Insect
  • Mushroom body
  • Olfaction
  • Parallel processing
  • Projection neuron

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Developmental Neuroscience
  • Cognitive Neuroscience
  • Cellular and Molecular Neuroscience

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