Acta Biologica Hungarica

, Volume 59, Supplement 2, pp 183–187 | Cite as

The Compartment Structures of the Antennal Lobe in the Ant, Aphaenogaster smythiesi japonica

  • Midori Sakura
  • T. Hiraguchi
  • K. Ohkawara
  • H. AonumaEmail author


Pheromones are important cues for social insects such as ants. As a first step in elucidation of pheromonal information processing mechanisms in the myrmicine ant, we investigated the morphological structure of the antennal lobe. Using autofluorescence imaging, labeling of neuronal filamentous actin, and reduced silver impregnation staining, the antennal lobe was found to consist of five compartments that, each received input from a different antennal sensory tract. Two major tracts of projection neurons, the medial and lateral antenno-cerebral tract (m- and l-ACT), originated from a different region of the antennal lobe. The m-ACT originated from the posterior part of the antennal lobe whereas the l-ACT originated from the anterior part. These results demonstrate a spatial segregation of function within the antennal lobe.


Olfactory glomeruli projection neurons antenno-cerebral tract pheromone social insect 


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© Akadémiai Kiadó, Budapest 2008

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Midori Sakura
    • 1
  • T. Hiraguchi
    • 1
    • 3
  • K. Ohkawara
    • 2
  • H. Aonuma
    • 1
    Email author
  1. 1.Research Institute for Electronic ScienceHokkaido UniversitySapporo, HokkaidoJapan
  2. 2.Graduate School of Natural Science and TechnologyKanazawa UniversityKanazawa, IshikawaJapan
  3. 3.Department of Mechanical and Control EngineeringTokyo Institute of TechnologyMeguro-ku, TokyoJapan

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