Activity and effective connectivity of parietal and occipital cortical regions during haptic shape perception.
Identifieur interne : 001812 ( PubMed/Corpus ); précédent : 001811; suivant : 001813Activity and effective connectivity of parietal and occipital cortical regions during haptic shape perception.
Auteurs : Scott Peltier ; Randall Stilla ; Erica Mariola ; Stephen Laconte ; Xiaoping Hu ; K. SathianSource :
- Neuropsychologia [ 0028-3932 ] ; 2007.
English descriptors
- KwdEn :
- Adult, Brain Mapping, Female, Form Perception (physiology), Functional Laterality, Humans, Image Processing, Computer-Assisted (methods), Magnetic Resonance Imaging (methods), Male, Neural Networks (Computer), Occipital Lobe (blood supply), Occipital Lobe (physiology), Oxygen (blood), Parietal Lobe (blood supply), Parietal Lobe (physiology), Pattern Recognition, Visual (physiology), Photic Stimulation, Reaction Time (physiology), Touch.
- MESH :
- chemical , blood : Oxygen.
- blood supply : Occipital Lobe, Parietal Lobe.
- methods : Image Processing, Computer-Assisted, Magnetic Resonance Imaging.
- physiology : Form Perception, Occipital Lobe, Parietal Lobe, Pattern Recognition, Visual, Reaction Time.
- Adult, Brain Mapping, Female, Functional Laterality, Humans, Male, Neural Networks (Computer), Photic Stimulation, Touch.
Abstract
It is now widely accepted that visual cortical areas are active during normal tactile perception, but the underlying mechanisms are still not clear. The goal of the present study was to use functional magnetic resonance imaging (fMRI) to investigate the activity and effective connectivity of parietal and occipital cortical areas during haptic shape perception, with a view to potentially clarifying the role of top-down and bottom-up inputs into visual areas. Subjects underwent fMRI scanning while engaging in discrimination of haptic shape or texture, and in separate runs, visual shape or texture. Accuracy did not differ significantly between tasks. Haptic shape-selective regions, identified on a contrast between the haptic shape and texture conditions in individual subjects, were found bilaterally in the postcentral sulcus (PCS), multiple parts of the intraparietal sulcus (IPS) and the lateral occipital complex (LOC). The IPS and LOC foci tended to be shape-selective in the visual modality as well. Structural equation modelling was used to study the effective connectivity among the haptic shape-selective regions in the left hemisphere, contralateral to the stimulated hand. All possible models were tested for their fit to the correlations among the observed time-courses of activity. Two equivalent models emerged as the winners. These models, which were quite similar, were characterized by both bottom-up paths from the PCS to parts of the IPS, and top-down paths from the LOC and parts of the IPS to the PCS. We conclude that interactions between unisensory and multisensory cortical areas involve bidirectional information flow.
DOI: 10.1016/j.neuropsychologia.2006.03.003
PubMed: 16616940
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Sathian</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2007">2007</date><idno type="doi">10.1016/j.neuropsychologia.2006.03.003</idno><idno type="RBID">pubmed:16616940</idno><idno type="pmid">16616940</idno><idno type="wicri:Area/PubMed/Corpus">001812</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Activity and effective connectivity of parietal and occipital cortical regions during haptic shape perception.</title><author><name sortKey="Peltier, Scott" sort="Peltier, Scott" uniqKey="Peltier S" first="Scott" last="Peltier">Scott Peltier</name><affiliation><nlm:affiliation>Coulter Department of Biomedical Engineering, Emory University School of Medicine, Atlanta, GA 30322, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Stilla, Randall" sort="Stilla, Randall" uniqKey="Stilla R" first="Randall" last="Stilla">Randall Stilla</name></author><author><name sortKey="Mariola, Erica" sort="Mariola, Erica" uniqKey="Mariola E" first="Erica" last="Mariola">Erica Mariola</name></author><author><name sortKey="Laconte, Stephen" sort="Laconte, Stephen" uniqKey="Laconte S" first="Stephen" last="Laconte">Stephen Laconte</name></author><author><name sortKey="Hu, Xiaoping" sort="Hu, Xiaoping" uniqKey="Hu X" first="Xiaoping" last="Hu">Xiaoping Hu</name></author><author><name sortKey="Sathian, K" sort="Sathian, K" uniqKey="Sathian K" first="K" last="Sathian">K. Sathian</name></author></analytic><series><title level="j">Neuropsychologia</title><idno type="ISSN">0028-3932</idno><imprint><date when="2007" type="published">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term><term>Brain Mapping</term><term>Female</term><term>Form Perception (physiology)</term><term>Functional Laterality</term><term>Humans</term><term>Image Processing, Computer-Assisted (methods)</term><term>Magnetic Resonance Imaging (methods)</term><term>Male</term><term>Neural Networks (Computer)</term><term>Occipital Lobe (blood supply)</term><term>Occipital Lobe (physiology)</term><term>Oxygen (blood)</term><term>Parietal Lobe (blood supply)</term><term>Parietal Lobe (physiology)</term><term>Pattern Recognition, Visual (physiology)</term><term>Photic Stimulation</term><term>Reaction Time (physiology)</term><term>Touch</term></keywords><keywords scheme="MESH" type="chemical" qualifier="blood" xml:lang="en"><term>Oxygen</term></keywords><keywords scheme="MESH" qualifier="blood supply" xml:lang="en"><term>Occipital Lobe</term><term>Parietal Lobe</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Image Processing, Computer-Assisted</term><term>Magnetic Resonance Imaging</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Form Perception</term><term>Occipital Lobe</term><term>Parietal Lobe</term><term>Pattern Recognition, Visual</term><term>Reaction Time</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Brain Mapping</term><term>Female</term><term>Functional Laterality</term><term>Humans</term><term>Male</term><term>Neural Networks (Computer)</term><term>Photic Stimulation</term><term>Touch</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">It is now widely accepted that visual cortical areas are active during normal tactile perception, but the underlying mechanisms are still not clear. The goal of the present study was to use functional magnetic resonance imaging (fMRI) to investigate the activity and effective connectivity of parietal and occipital cortical areas during haptic shape perception, with a view to potentially clarifying the role of top-down and bottom-up inputs into visual areas. Subjects underwent fMRI scanning while engaging in discrimination of haptic shape or texture, and in separate runs, visual shape or texture. Accuracy did not differ significantly between tasks. Haptic shape-selective regions, identified on a contrast between the haptic shape and texture conditions in individual subjects, were found bilaterally in the postcentral sulcus (PCS), multiple parts of the intraparietal sulcus (IPS) and the lateral occipital complex (LOC). The IPS and LOC foci tended to be shape-selective in the visual modality as well. Structural equation modelling was used to study the effective connectivity among the haptic shape-selective regions in the left hemisphere, contralateral to the stimulated hand. All possible models were tested for their fit to the correlations among the observed time-courses of activity. Two equivalent models emerged as the winners. These models, which were quite similar, were characterized by both bottom-up paths from the PCS to parts of the IPS, and top-down paths from the LOC and parts of the IPS to the PCS. We conclude that interactions between unisensory and multisensory cortical areas involve bidirectional information flow.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">16616940</PMID><DateCreated><Year>2006</Year><Month>12</Month><Day>18</Day></DateCreated><DateCompleted><Year>2007</Year><Month>03</Month><Day>27</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0028-3932</ISSN><JournalIssue CitedMedium="Print"><Volume>45</Volume><Issue>3</Issue><PubDate><Year>2007</Year><Month>Feb</Month><Day>1</Day></PubDate></JournalIssue><Title>Neuropsychologia</Title><ISOAbbreviation>Neuropsychologia</ISOAbbreviation></Journal><ArticleTitle>Activity and effective connectivity of parietal and occipital cortical regions during haptic shape perception.</ArticleTitle><Pagination><MedlinePgn>476-83</MedlinePgn></Pagination><Abstract><AbstractText>It is now widely accepted that visual cortical areas are active during normal tactile perception, but the underlying mechanisms are still not clear. The goal of the present study was to use functional magnetic resonance imaging (fMRI) to investigate the activity and effective connectivity of parietal and occipital cortical areas during haptic shape perception, with a view to potentially clarifying the role of top-down and bottom-up inputs into visual areas. Subjects underwent fMRI scanning while engaging in discrimination of haptic shape or texture, and in separate runs, visual shape or texture. Accuracy did not differ significantly between tasks. Haptic shape-selective regions, identified on a contrast between the haptic shape and texture conditions in individual subjects, were found bilaterally in the postcentral sulcus (PCS), multiple parts of the intraparietal sulcus (IPS) and the lateral occipital complex (LOC). The IPS and LOC foci tended to be shape-selective in the visual modality as well. Structural equation modelling was used to study the effective connectivity among the haptic shape-selective regions in the left hemisphere, contralateral to the stimulated hand. All possible models were tested for their fit to the correlations among the observed time-courses of activity. Two equivalent models emerged as the winners. These models, which were quite similar, were characterized by both bottom-up paths from the PCS to parts of the IPS, and top-down paths from the LOC and parts of the IPS to the PCS. We conclude that interactions between unisensory and multisensory cortical areas involve bidirectional information flow.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Peltier</LastName><ForeName>Scott</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>Coulter Department of Biomedical Engineering, Emory University School of Medicine, Atlanta, GA 30322, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Stilla</LastName><ForeName>Randall</ForeName><Initials>R</Initials></Author><Author ValidYN="Y"><LastName>Mariola</LastName><ForeName>Erica</ForeName><Initials>E</Initials></Author><Author ValidYN="Y"><LastName>LaConte</LastName><ForeName>Stephen</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Hu</LastName><ForeName>Xiaoping</ForeName><Initials>X</Initials></Author><Author 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