The cellular and circuit basis for evolutionary change in sensory perception in mormyrid fishes

Abstract Species differences in perception have been linked to divergence in gross neuroanatomical features of sensory pathways. The anatomical and physiological basis of evolutionary change in sensory processing at cellular and circuit levels, however, is poorly understood. Here, we show how specif...

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Autores principales:	Alejandro Vélez, Tsunehiko Kohashi, Anan Lu, Bruce A. Carlson
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/30736f70a6744298b9b2286e724d6369
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spelling	oai:doaj.org-article:30736f70a6744298b9b2286e724d63692021-12-02T12:32:31ZThe cellular and circuit basis for evolutionary change in sensory perception in mormyrid fishes10.1038/s41598-017-03951-y2045-2322https://doaj.org/article/30736f70a6744298b9b2286e724d63692017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03951-yhttps://doaj.org/toc/2045-2322Abstract Species differences in perception have been linked to divergence in gross neuroanatomical features of sensory pathways. The anatomical and physiological basis of evolutionary change in sensory processing at cellular and circuit levels, however, is poorly understood. Here, we show how specific changes to a sensory microcircuit are associated with the evolution of a novel perceptual ability. In mormyrid fishes, the ability to detect variation in electric communication signals is correlated with an enlargement of the midbrain exterolateral nucleus (EL), and a differentiation into separate anterior (ELa) and posterior (ELp) regions. We show that the same cell types and connectivity are found in both EL and ELa/ELp. The evolution of ELa/ELp, and the concomitant ability to detect signal variation, is associated with a lengthening of incoming hindbrain axons to form delay lines, allowing for fine temporal analysis of signals. The enlargement of this brain region is also likely due to an overall increase in cell numbers, which would allow for processing of a wider range of timing information.Alejandro VélezTsunehiko KohashiAnan LuBruce A. CarlsonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-18 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alejandro Vélez Tsunehiko Kohashi Anan Lu Bruce A. Carlson The cellular and circuit basis for evolutionary change in sensory perception in mormyrid fishes
description	Abstract Species differences in perception have been linked to divergence in gross neuroanatomical features of sensory pathways. The anatomical and physiological basis of evolutionary change in sensory processing at cellular and circuit levels, however, is poorly understood. Here, we show how specific changes to a sensory microcircuit are associated with the evolution of a novel perceptual ability. In mormyrid fishes, the ability to detect variation in electric communication signals is correlated with an enlargement of the midbrain exterolateral nucleus (EL), and a differentiation into separate anterior (ELa) and posterior (ELp) regions. We show that the same cell types and connectivity are found in both EL and ELa/ELp. The evolution of ELa/ELp, and the concomitant ability to detect signal variation, is associated with a lengthening of incoming hindbrain axons to form delay lines, allowing for fine temporal analysis of signals. The enlargement of this brain region is also likely due to an overall increase in cell numbers, which would allow for processing of a wider range of timing information.
format	article
author	Alejandro Vélez Tsunehiko Kohashi Anan Lu Bruce A. Carlson
author_facet	Alejandro Vélez Tsunehiko Kohashi Anan Lu Bruce A. Carlson
author_sort	Alejandro Vélez
title	The cellular and circuit basis for evolutionary change in sensory perception in mormyrid fishes
title_short	The cellular and circuit basis for evolutionary change in sensory perception in mormyrid fishes
title_full	The cellular and circuit basis for evolutionary change in sensory perception in mormyrid fishes
title_fullStr	The cellular and circuit basis for evolutionary change in sensory perception in mormyrid fishes
title_full_unstemmed	The cellular and circuit basis for evolutionary change in sensory perception in mormyrid fishes
title_sort	cellular and circuit basis for evolutionary change in sensory perception in mormyrid fishes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/30736f70a6744298b9b2286e724d6369
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The cellular and circuit basis for evolutionary change in sensory perception in mormyrid fishes

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