What we see is how we are: New paradigms in visual research

As most sensory modalities, the visual system needs to deal with very fast changes in the environment. Instead of processing all sensory stimuli, the brain is able to construct a perceptual experience by combining selected sensory input with an ongoing internal activity. Thus, the study of visual pe...

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Autor principal:	MALDONADO A,PEDRO
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2007
Materias:	perception synchrony neural coding
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000500006
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spelling	oai:scielo:S0716-976020070005000062008-05-28What we see is how we are: New paradigms in visual researchMALDONADO A,PEDRO perception synchrony neural coding As most sensory modalities, the visual system needs to deal with very fast changes in the environment. Instead of processing all sensory stimuli, the brain is able to construct a perceptual experience by combining selected sensory input with an ongoing internal activity. Thus, the study of visual perception needs to be approached by examining not only the physical properties of stimuli, but also the brain's ongoing dynamical states onto which these perturbations are imposed. At least three different models account for this internal dynamics. One model is based on cardinal cells where the activity of few cells by itself constitutes the neuronal correlate of perception, while a second model is based on a population coding that states that the neuronal correlate of perception requires distributed activity throughout many areas of the brain. A third proposition, known as the temporal correlation hypothesis states that the distributed neuronal populations that correlate with perception, are also defined by synchronization of the activity on a millisecond time scale. This would serve to encode contextual information by defining relations between the features of visual objects. If temporal properties of neural activity are important to establish the neural mechanisms of perception, then the study of appropriate dynamical stimuli should be instrumental to determine how these systems operate. The use of natural stimuli and natural behaviors such as free viewing, which features fast changes of internal brain states as seen by motor markers, is proposed as a new experimental paradigm to study visual perceptioninfo:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.40 n.4 20072007-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000500006en10.4067/S0716-97602007000500006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	perception synchrony neural coding
spellingShingle	perception synchrony neural coding MALDONADO A,PEDRO What we see is how we are: New paradigms in visual research
description	As most sensory modalities, the visual system needs to deal with very fast changes in the environment. Instead of processing all sensory stimuli, the brain is able to construct a perceptual experience by combining selected sensory input with an ongoing internal activity. Thus, the study of visual perception needs to be approached by examining not only the physical properties of stimuli, but also the brain's ongoing dynamical states onto which these perturbations are imposed. At least three different models account for this internal dynamics. One model is based on cardinal cells where the activity of few cells by itself constitutes the neuronal correlate of perception, while a second model is based on a population coding that states that the neuronal correlate of perception requires distributed activity throughout many areas of the brain. A third proposition, known as the temporal correlation hypothesis states that the distributed neuronal populations that correlate with perception, are also defined by synchronization of the activity on a millisecond time scale. This would serve to encode contextual information by defining relations between the features of visual objects. If temporal properties of neural activity are important to establish the neural mechanisms of perception, then the study of appropriate dynamical stimuli should be instrumental to determine how these systems operate. The use of natural stimuli and natural behaviors such as free viewing, which features fast changes of internal brain states as seen by motor markers, is proposed as a new experimental paradigm to study visual perception
author	MALDONADO A,PEDRO
author_facet	MALDONADO A,PEDRO
author_sort	MALDONADO A,PEDRO
title	What we see is how we are: New paradigms in visual research
title_short	What we see is how we are: New paradigms in visual research
title_full	What we see is how we are: New paradigms in visual research
title_fullStr	What we see is how we are: New paradigms in visual research
title_full_unstemmed	What we see is how we are: New paradigms in visual research
title_sort	what we see is how we are: new paradigms in visual research
publisher	Sociedad de Biología de Chile
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000500006
work_keys_str_mv	AT maldonadoapedro whatweseeishowwearenewparadigmsinvisualresearch
_version_	1718441424279568384

What we see is how we are: New paradigms in visual research

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