Cargando…

Rapid categorization of natural face images in the infant right hemisphere

Human performance at categorizing natural visual images surpasses automatic algorithms, but how and when this function arises and develops remain unanswered. We recorded scalp electrical brain activity in 4–6 months infants viewing images of objects in their natural background at a rapid rate of 6 i...

Descripción completa

Detalles Bibliográficos
Autores principales: de Heering, Adélaïde, Rossion, Bruno
Formato: Online Artículo Texto
Lenguaje:English
Publicado: eLife Sciences Publications, Ltd 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4450157/
https://www.ncbi.nlm.nih.gov/pubmed/26032564
http://dx.doi.org/10.7554/eLife.06564
_version_ 1782373966557478912
author de Heering, Adélaïde
Rossion, Bruno
author_facet de Heering, Adélaïde
Rossion, Bruno
author_sort de Heering, Adélaïde
collection PubMed
description Human performance at categorizing natural visual images surpasses automatic algorithms, but how and when this function arises and develops remain unanswered. We recorded scalp electrical brain activity in 4–6 months infants viewing images of objects in their natural background at a rapid rate of 6 images/second (6 Hz). Widely variable face images appearing every 5 stimuli generate an electrophysiological response over the right hemisphere exactly at 1.2 Hz (6 Hz/5). This face-selective response is absent for phase-scrambled images and therefore not due to low-level information. These findings indicate that right lateralized face-selective processes emerge well before reading acquisition in the infant brain, which can perform figure-ground segregation and generalize face-selective responses across changes in size, viewpoint, illumination as well as expression, age and gender. These observations made with a highly sensitive and objective approach open an avenue for clarifying the developmental course of natural image categorization in the human brain. DOI: http://dx.doi.org/10.7554/eLife.06564.001
format Online
Article
Text
id pubmed-4450157
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher eLife Sciences Publications, Ltd
record_format MEDLINE/PubMed
spelling pubmed-44501572015-06-03 Rapid categorization of natural face images in the infant right hemisphere de Heering, Adélaïde Rossion, Bruno eLife Neuroscience Human performance at categorizing natural visual images surpasses automatic algorithms, but how and when this function arises and develops remain unanswered. We recorded scalp electrical brain activity in 4–6 months infants viewing images of objects in their natural background at a rapid rate of 6 images/second (6 Hz). Widely variable face images appearing every 5 stimuli generate an electrophysiological response over the right hemisphere exactly at 1.2 Hz (6 Hz/5). This face-selective response is absent for phase-scrambled images and therefore not due to low-level information. These findings indicate that right lateralized face-selective processes emerge well before reading acquisition in the infant brain, which can perform figure-ground segregation and generalize face-selective responses across changes in size, viewpoint, illumination as well as expression, age and gender. These observations made with a highly sensitive and objective approach open an avenue for clarifying the developmental course of natural image categorization in the human brain. DOI: http://dx.doi.org/10.7554/eLife.06564.001 eLife Sciences Publications, Ltd 2015-06-02 /pmc/articles/PMC4450157/ /pubmed/26032564 http://dx.doi.org/10.7554/eLife.06564 Text en © 2015, de Heering and Rossion http://creativecommons.org/licenses/by/4.0/ This article is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited.
spellingShingle Neuroscience
de Heering, Adélaïde
Rossion, Bruno
Rapid categorization of natural face images in the infant right hemisphere
title Rapid categorization of natural face images in the infant right hemisphere
title_full Rapid categorization of natural face images in the infant right hemisphere
title_fullStr Rapid categorization of natural face images in the infant right hemisphere
title_full_unstemmed Rapid categorization of natural face images in the infant right hemisphere
title_short Rapid categorization of natural face images in the infant right hemisphere
title_sort rapid categorization of natural face images in the infant right hemisphere
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4450157/
https://www.ncbi.nlm.nih.gov/pubmed/26032564
http://dx.doi.org/10.7554/eLife.06564
work_keys_str_mv AT deheeringadelaide rapidcategorizationofnaturalfaceimagesintheinfantrighthemisphere
AT rossionbruno rapidcategorizationofnaturalfaceimagesintheinfantrighthemisphere