Early differential sensitivity of evoked-potentials to local and global shape during the perception of three-dimensional objects.
Identifieur interne : 001A97 ( PubMed/Curation ); précédent : 001A96; suivant : 001A98Early differential sensitivity of evoked-potentials to local and global shape during the perception of three-dimensional objects.
Auteurs : E Charles Leek [France] ; Mark Roberts [Royaume-Uni] ; Zoe J. Oliver [Royaume-Uni] ; Filipe Cristino [Royaume-Uni] ; Alan J. Pegna [Australie]Source :
- Neuropsychologia [ 1873-3514 ] ; 2016.
Descripteurs français
- KwdFr :
- Adulte, Analyse de variance, Cartographie cérébrale, Femelle, Humains, Jeune adulte, Mâle, Perception de la profondeur (physiologie), Potentiels évoqués visuels (physiologie), Reconnaissance visuelle des formes (physiologie), Stimulation lumineuse, Temps de réaction (physiologie), Électroencéphalographie.
- MESH :
English descriptors
- KwdEn :
- MESH :
Abstract
Here we investigated the time course underlying differential processing of local and global shape information during the perception of complex three-dimensional (3D) objects. Observers made shape matching judgments about pairs of sequentially presented multi-part novel objects. Event-related potentials (ERPs) were used to measure perceptual sensitivity to 3D shape differences in terms of local part structure and global shape configuration - based on predictions derived from hierarchical structural description models of object recognition. There were three types of different object trials in which stimulus pairs (1) shared local parts but differed in global shape configuration; (2) contained different local parts but shared global configuration or (3) shared neither local parts nor global configuration. Analyses of the ERP data showed differential amplitude modulation as a function of shape similarity as early as the N1 component between 146-215ms post-stimulus onset. These negative amplitude deflections were more similar between objects sharing global shape configuration than local part structure. Differentiation among all stimulus types was reflected in N2 amplitude modulations between 276-330ms. sLORETA inverse solutions showed stronger involvement of left occipitotemporal areas during the N1 for object discrimination weighted towards local part structure. The results suggest that the perception of 3D object shape involves parallel processing of information at local and global scales. This processing is characterised by relatively slow derivation of 'fine-grained' local shape structure, and fast derivation of 'coarse-grained' global shape configuration. We propose that the rapid early derivation of global shape attributes underlies the observed patterns of N1 amplitude modulations.
DOI: 10.1016/j.neuropsychologia.2016.07.006
PubMed: 27396674
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Differentiation among all stimulus types was reflected in N2 amplitude modulations between 276-330ms. sLORETA inverse solutions showed stronger involvement of left occipitotemporal areas during the N1 for object discrimination weighted towards local part structure. The results suggest that the perception of 3D object shape involves parallel processing of information at local and global scales. This processing is characterised by relatively slow derivation of 'fine-grained' local shape structure, and fast derivation of 'coarse-grained' global shape configuration. We propose that the rapid early derivation of global shape attributes underlies the observed patterns of N1 amplitude modulations.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">27396674</PMID><DateCreated><Year>2016</Year><Month>08</Month><Day>24</Day></DateCreated><DateCompleted><Year>2017</Year><Month>05</Month><Day>05</Day></DateCompleted><DateRevised><Year>2017</Year><Month>11</Month><Day>07</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1873-3514</ISSN><JournalIssue CitedMedium="Internet"><Volume>89</Volume><PubDate><Year>2016</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Neuropsychologia</Title><ISOAbbreviation>Neuropsychologia</ISOAbbreviation></Journal><ArticleTitle>Early differential sensitivity of evoked-potentials to local and global shape during the perception of three-dimensional objects.</ArticleTitle><Pagination><MedlinePgn>495-509</MedlinePgn></Pagination><ELocationID EIdType="pii" ValidYN="Y">S0028-3932(16)30244-5</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.neuropsychologia.2016.07.006</ELocationID><Abstract><AbstractText>Here we investigated the time course underlying differential processing of local and global shape information during the perception of complex three-dimensional (3D) objects. Observers made shape matching judgments about pairs of sequentially presented multi-part novel objects. Event-related potentials (ERPs) were used to measure perceptual sensitivity to 3D shape differences in terms of local part structure and global shape configuration - based on predictions derived from hierarchical structural description models of object recognition. There were three types of different object trials in which stimulus pairs (1) shared local parts but differed in global shape configuration; (2) contained different local parts but shared global configuration or (3) shared neither local parts nor global configuration. Analyses of the ERP data showed differential amplitude modulation as a function of shape similarity as early as the N1 component between 146-215ms post-stimulus onset. These negative amplitude deflections were more similar between objects sharing global shape configuration than local part structure. Differentiation among all stimulus types was reflected in N2 amplitude modulations between 276-330ms. sLORETA inverse solutions showed stronger involvement of left occipitotemporal areas during the N1 for object discrimination weighted towards local part structure. The results suggest that the perception of 3D object shape involves parallel processing of information at local and global scales. This processing is characterised by relatively slow derivation of 'fine-grained' local shape structure, and fast derivation of 'coarse-grained' global shape configuration. We propose that the rapid early derivation of global shape attributes underlies the observed patterns of N1 amplitude modulations.</AbstractText><CopyrightInformation>Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Leek</LastName><ForeName>E Charles</ForeName><Initials>EC</Initials><AffiliationInfo><Affiliation>Wolfson Centre for Clinical and Cognitive Neuroscience, School of Psychology, Bangor University, UK; Laboratoire de Psychologie et NeuroCognition (LPNC), Université Grenoble Alpes, France. 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