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Evolution of olfactory circuits in insects
Recent years have seen an explosion of interest in the evolution of neural circuits. Comparison of animals from different families, orders, and phyla reveals fascinating variation in brain morphology, circuit structure, and neural cell types. However, it can be difficult to connect the complex chang...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7192870/ https://www.ncbi.nlm.nih.gov/pubmed/31984441 http://dx.doi.org/10.1007/s00359-020-01399-6 |
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author | Zhao, Zhilei McBride, Carolyn S. |
author_facet | Zhao, Zhilei McBride, Carolyn S. |
author_sort | Zhao, Zhilei |
collection | PubMed |
description | Recent years have seen an explosion of interest in the evolution of neural circuits. Comparison of animals from different families, orders, and phyla reveals fascinating variation in brain morphology, circuit structure, and neural cell types. However, it can be difficult to connect the complex changes that occur across long evolutionary distances to behavior. Luckily, these changes accumulate through processes that should also be observable in recent time, making more tractable comparisons of closely related species relevant and complementary. Here, we review several decades of research on the evolution of insect olfactory circuits across short evolutionary time scales. We describe two well-studied systems, Drosophila sechellia flies and Heliothis moths, in detailed case studies. We then move through key types of circuit evolution, cataloging examples from other insects and looking for general patterns. The literature is dominated by changes in sensory neuron number and tuning at the periphery—often enhancing neural response to odorants with new ecological or social relevance. However, changes in the way olfactory information is processed by central circuits is clearly important in a few cases, and we suspect the development of genetic tools in non-model species will reveal a broad role for central circuit evolution. Moving forward, such tools should also be used to rigorously test causal links between brain evolution and behavior. |
format | Online Article Text |
id | pubmed-7192870 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-71928702020-05-05 Evolution of olfactory circuits in insects Zhao, Zhilei McBride, Carolyn S. J Comp Physiol A Neuroethol Sens Neural Behav Physiol Review Recent years have seen an explosion of interest in the evolution of neural circuits. Comparison of animals from different families, orders, and phyla reveals fascinating variation in brain morphology, circuit structure, and neural cell types. However, it can be difficult to connect the complex changes that occur across long evolutionary distances to behavior. Luckily, these changes accumulate through processes that should also be observable in recent time, making more tractable comparisons of closely related species relevant and complementary. Here, we review several decades of research on the evolution of insect olfactory circuits across short evolutionary time scales. We describe two well-studied systems, Drosophila sechellia flies and Heliothis moths, in detailed case studies. We then move through key types of circuit evolution, cataloging examples from other insects and looking for general patterns. The literature is dominated by changes in sensory neuron number and tuning at the periphery—often enhancing neural response to odorants with new ecological or social relevance. However, changes in the way olfactory information is processed by central circuits is clearly important in a few cases, and we suspect the development of genetic tools in non-model species will reveal a broad role for central circuit evolution. Moving forward, such tools should also be used to rigorously test causal links between brain evolution and behavior. Springer Berlin Heidelberg 2020-01-27 2020 /pmc/articles/PMC7192870/ /pubmed/31984441 http://dx.doi.org/10.1007/s00359-020-01399-6 Text en © The Author(s) 2020, corrected publication 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Review Zhao, Zhilei McBride, Carolyn S. Evolution of olfactory circuits in insects |
title | Evolution of olfactory circuits in insects |
title_full | Evolution of olfactory circuits in insects |
title_fullStr | Evolution of olfactory circuits in insects |
title_full_unstemmed | Evolution of olfactory circuits in insects |
title_short | Evolution of olfactory circuits in insects |
title_sort | evolution of olfactory circuits in insects |
topic | Review |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7192870/ https://www.ncbi.nlm.nih.gov/pubmed/31984441 http://dx.doi.org/10.1007/s00359-020-01399-6 |
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