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Active Electric Imaging: Body-Object Interplay and Object's “Electric Texture”

This article deals with the role of fish's body and object's geometry on determining the image spatial shape in pulse Gymnotiforms. This problem was explored by measuring local electric fields along a line on the skin in the presence and absence of objects. We depicted object's electr...

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Autores principales: Caputi, Ángel A., Aguilera, Pedro A., Pereira, Ana Carolina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3158059/
https://www.ncbi.nlm.nih.gov/pubmed/21876730
http://dx.doi.org/10.1371/journal.pone.0022793
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author Caputi, Ángel A.
Aguilera, Pedro A.
Pereira, Ana Carolina
author_facet Caputi, Ángel A.
Aguilera, Pedro A.
Pereira, Ana Carolina
author_sort Caputi, Ángel A.
collection PubMed
description This article deals with the role of fish's body and object's geometry on determining the image spatial shape in pulse Gymnotiforms. This problem was explored by measuring local electric fields along a line on the skin in the presence and absence of objects. We depicted object's electric images at different regions of the electrosensory mosaic, paying particular attention to the perioral region where a fovea has been described. When sensory surface curvature increases relative to the object's curvature, the image details depending on object's shape are blurred and finally disappear. The remaining effect of the object on the stimulus profile depends on the strength of its global polarization. This depends on the length of the object's axis aligned with the field, in turn depending on fish body geometry. Thus, fish's body and self-generated electric field geometries are embodied in this “global effect” of the object. The presence of edges or local changes in impedance at the nearest surface of closely located objects adds peaks to the image profiles (“local effect” or “object's electric texture”). It is concluded that two cues for object recognition may be used by active electroreceptive animals: global effects (informing on object's dimension along the field lines, conductance, and position) and local effects (informing on object's surface). Since the field has fish's centered coordinates, and electrosensory fovea is used for exploration of surfaces, fish fine movements are essential to perform electric perception. We conclude that fish may explore adjacent objects combining active movements and electrogenesis to represent them using electrosensory information.
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spelling pubmed-31580592011-08-29 Active Electric Imaging: Body-Object Interplay and Object's “Electric Texture” Caputi, Ángel A. Aguilera, Pedro A. Pereira, Ana Carolina PLoS One Research Article This article deals with the role of fish's body and object's geometry on determining the image spatial shape in pulse Gymnotiforms. This problem was explored by measuring local electric fields along a line on the skin in the presence and absence of objects. We depicted object's electric images at different regions of the electrosensory mosaic, paying particular attention to the perioral region where a fovea has been described. When sensory surface curvature increases relative to the object's curvature, the image details depending on object's shape are blurred and finally disappear. The remaining effect of the object on the stimulus profile depends on the strength of its global polarization. This depends on the length of the object's axis aligned with the field, in turn depending on fish body geometry. Thus, fish's body and self-generated electric field geometries are embodied in this “global effect” of the object. The presence of edges or local changes in impedance at the nearest surface of closely located objects adds peaks to the image profiles (“local effect” or “object's electric texture”). It is concluded that two cues for object recognition may be used by active electroreceptive animals: global effects (informing on object's dimension along the field lines, conductance, and position) and local effects (informing on object's surface). Since the field has fish's centered coordinates, and electrosensory fovea is used for exploration of surfaces, fish fine movements are essential to perform electric perception. We conclude that fish may explore adjacent objects combining active movements and electrogenesis to represent them using electrosensory information. Public Library of Science 2011-08-18 /pmc/articles/PMC3158059/ /pubmed/21876730 http://dx.doi.org/10.1371/journal.pone.0022793 Text en Caputi et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Caputi, Ángel A.
Aguilera, Pedro A.
Pereira, Ana Carolina
Active Electric Imaging: Body-Object Interplay and Object's “Electric Texture”
title Active Electric Imaging: Body-Object Interplay and Object's “Electric Texture”
title_full Active Electric Imaging: Body-Object Interplay and Object's “Electric Texture”
title_fullStr Active Electric Imaging: Body-Object Interplay and Object's “Electric Texture”
title_full_unstemmed Active Electric Imaging: Body-Object Interplay and Object's “Electric Texture”
title_short Active Electric Imaging: Body-Object Interplay and Object's “Electric Texture”
title_sort active electric imaging: body-object interplay and object's “electric texture”
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3158059/
https://www.ncbi.nlm.nih.gov/pubmed/21876730
http://dx.doi.org/10.1371/journal.pone.0022793
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