The Two Visual Systems Hypothesis: New Challenges and Insights from Visual form Agnosic Patient DF.
Identifieur interne : 000461 ( PubMed/Corpus ); précédent : 000460; suivant : 000462The Two Visual Systems Hypothesis: New Challenges and Insights from Visual form Agnosic Patient DF.
Auteurs : Robert L. Whitwell ; A David Milner ; Melvyn A. GoodaleSource :
- Frontiers in neurology [ 1664-2295 ] ; 2014.
Abstract
Patient DF, who developed visual form agnosia following carbon monoxide poisoning, is still able to use vision to adjust the configuration of her grasping hand to the geometry of a goal object. This striking dissociation between perception and action in DF provided a key piece of evidence for the formulation of Goodale and Milner's Two Visual Systems Hypothesis (TVSH). According to the TVSH, the ventral stream plays a critical role in constructing our visual percepts, whereas the dorsal stream mediates the visual control of action, such as visually guided grasping. In this review, we discuss recent studies of DF that provide new insights into the functional organization of the dorsal and ventral streams. We confirm recent evidence that DF has dorsal as well as ventral brain damage - and that her dorsal-stream lesions and surrounding atrophy have increased in size since her first published brain scan. We argue that the damage to DF's dorsal stream explains her deficits in directing actions at targets in the periphery. We then focus on DF's ability to accurately adjust her in-flight hand aperture to changes in the width of goal objects (grip scaling) whose dimensions she cannot explicitly report. An examination of several studies of DF's grip scaling under natural conditions reveals a modest though significant deficit. Importantly, however, she continues to show a robust dissociation between form vision for perception and form vision-for-action. We also review recent studies that explore the role of online visual feedback and terminal haptic feedback in the programming and control of her grasping. These studies make it clear that DF is no more reliant on visual or haptic feedback than are neurologically intact individuals. In short, we argue that her ability to grasp objects depends on visual feedforward processing carried out by visuomotor networks in her dorsal stream that function in the much the same way as they do in neurologically intact individuals.
DOI: 10.3389/fneur.2014.00255
PubMed: 25538675
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Whitwell</name><affiliation><nlm:affiliation>Graduate Program in Neuroscience, The University of Western Ontario , London, ON , Canada ; Department of Psychology, The University of Western Ontario , London, ON , Canada ; Brain and Mind Institute, The University of Western Ontario , London, ON , Canada.</nlm:affiliation></affiliation></author><author><name sortKey="Milner, A David" sort="Milner, A David" uniqKey="Milner A" first="A David" last="Milner">A David Milner</name><affiliation><nlm:affiliation>Department of Psychology, Durham University , Durham , UK.</nlm:affiliation></affiliation></author><author><name sortKey="Goodale, Melvyn A" sort="Goodale, Melvyn A" uniqKey="Goodale M" first="Melvyn A" last="Goodale">Melvyn A. Goodale</name><affiliation><nlm:affiliation>Department of Psychology, The University of Western Ontario , London, ON , Canada ; Brain and Mind Institute, The University of Western Ontario , London, ON , Canada ; Department of Physiology and Pharmacology, The University of Western Ontario , London, ON , Canada.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2014">2014</date><idno type="doi">10.3389/fneur.2014.00255</idno><idno type="RBID">pubmed:25538675</idno><idno type="pmid">25538675</idno><idno type="wicri:Area/PubMed/Corpus">000461</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">The Two Visual Systems Hypothesis: New Challenges and Insights from Visual form Agnosic Patient DF.</title><author><name sortKey="Whitwell, Robert L" sort="Whitwell, Robert L" uniqKey="Whitwell R" first="Robert L" last="Whitwell">Robert L. Whitwell</name><affiliation><nlm:affiliation>Graduate Program in Neuroscience, The University of Western Ontario , London, ON , Canada ; Department of Psychology, The University of Western Ontario , London, ON , Canada ; Brain and Mind Institute, The University of Western Ontario , London, ON , Canada.</nlm:affiliation></affiliation></author><author><name sortKey="Milner, A David" sort="Milner, A David" uniqKey="Milner A" first="A David" last="Milner">A David Milner</name><affiliation><nlm:affiliation>Department of Psychology, Durham University , Durham , UK.</nlm:affiliation></affiliation></author><author><name sortKey="Goodale, Melvyn A" sort="Goodale, Melvyn A" uniqKey="Goodale M" first="Melvyn A" last="Goodale">Melvyn A. Goodale</name><affiliation><nlm:affiliation>Department of Psychology, The University of Western Ontario , London, ON , Canada ; Brain and Mind Institute, The University of Western Ontario , London, ON , Canada ; Department of Physiology and Pharmacology, The University of Western Ontario , London, ON , Canada.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Frontiers in neurology</title><idno type="eISSN">1664-2295</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Patient DF, who developed visual form agnosia following carbon monoxide poisoning, is still able to use vision to adjust the configuration of her grasping hand to the geometry of a goal object. This striking dissociation between perception and action in DF provided a key piece of evidence for the formulation of Goodale and Milner's Two Visual Systems Hypothesis (TVSH). According to the TVSH, the ventral stream plays a critical role in constructing our visual percepts, whereas the dorsal stream mediates the visual control of action, such as visually guided grasping. In this review, we discuss recent studies of DF that provide new insights into the functional organization of the dorsal and ventral streams. We confirm recent evidence that DF has dorsal as well as ventral brain damage - and that her dorsal-stream lesions and surrounding atrophy have increased in size since her first published brain scan. We argue that the damage to DF's dorsal stream explains her deficits in directing actions at targets in the periphery. We then focus on DF's ability to accurately adjust her in-flight hand aperture to changes in the width of goal objects (grip scaling) whose dimensions she cannot explicitly report. An examination of several studies of DF's grip scaling under natural conditions reveals a modest though significant deficit. Importantly, however, she continues to show a robust dissociation between form vision for perception and form vision-for-action. We also review recent studies that explore the role of online visual feedback and terminal haptic feedback in the programming and control of her grasping. These studies make it clear that DF is no more reliant on visual or haptic feedback than are neurologically intact individuals. In short, we argue that her ability to grasp objects depends on visual feedforward processing carried out by visuomotor networks in her dorsal stream that function in the much the same way as they do in neurologically intact individuals.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">25538675</PMID><DateCreated><Year>2014</Year><Month>12</Month><Day>24</Day></DateCreated><DateCompleted><Year>2014</Year><Month>12</Month><Day>24</Day></DateCompleted><DateRevised><Year>2014</Year><Month>12</Month><Day>31</Day></DateRevised><Article PubModel="Electronic-eCollection"><Journal><ISSN IssnType="Electronic">1664-2295</ISSN><JournalIssue CitedMedium="Print"><Volume>5</Volume><PubDate><Year>2014</Year></PubDate></JournalIssue><Title>Frontiers in neurology</Title><ISOAbbreviation>Front Neurol</ISOAbbreviation></Journal><ArticleTitle>The Two Visual Systems Hypothesis: New Challenges and Insights from Visual form Agnosic Patient DF.</ArticleTitle><Pagination><MedlinePgn>255</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.3389/fneur.2014.00255</ELocationID><Abstract><AbstractText>Patient DF, who developed visual form agnosia following carbon monoxide poisoning, is still able to use vision to adjust the configuration of her grasping hand to the geometry of a goal object. This striking dissociation between perception and action in DF provided a key piece of evidence for the formulation of Goodale and Milner's Two Visual Systems Hypothesis (TVSH). According to the TVSH, the ventral stream plays a critical role in constructing our visual percepts, whereas the dorsal stream mediates the visual control of action, such as visually guided grasping. In this review, we discuss recent studies of DF that provide new insights into the functional organization of the dorsal and ventral streams. We confirm recent evidence that DF has dorsal as well as ventral brain damage - and that her dorsal-stream lesions and surrounding atrophy have increased in size since her first published brain scan. We argue that the damage to DF's dorsal stream explains her deficits in directing actions at targets in the periphery. We then focus on DF's ability to accurately adjust her in-flight hand aperture to changes in the width of goal objects (grip scaling) whose dimensions she cannot explicitly report. An examination of several studies of DF's grip scaling under natural conditions reveals a modest though significant deficit. Importantly, however, she continues to show a robust dissociation between form vision for perception and form vision-for-action. We also review recent studies that explore the role of online visual feedback and terminal haptic feedback in the programming and control of her grasping. These studies make it clear that DF is no more reliant on visual or haptic feedback than are neurologically intact individuals. In short, we argue that her ability to grasp objects depends on visual feedforward processing carried out by visuomotor networks in her dorsal stream that function in the much the same way as they do in neurologically intact individuals.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Whitwell</LastName><ForeName>Robert L</ForeName><Initials>RL</Initials><AffiliationInfo><Affiliation>Graduate Program in Neuroscience, The University of Western Ontario , London, ON , Canada ; Department of Psychology, The University of Western Ontario , London, ON , Canada ; Brain and Mind Institute, The University of Western Ontario , London, ON , Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Milner</LastName><ForeName>A David</ForeName><Initials>AD</Initials><AffiliationInfo><Affiliation>Department of Psychology, Durham University , Durham , UK.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Goodale</LastName><ForeName>Melvyn A</ForeName><Initials>MA</Initials><AffiliationInfo><Affiliation>Department of Psychology, The University of Western Ontario , London, ON , Canada ; Brain and Mind Institute, The University of Western Ontario , London, ON , Canada ; Department of Physiology and Pharmacology, The University of Western Ontario , London, ON , Canada.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D016454">Review</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>12</Month><Day>08</Day></ArticleDate></Article><MedlineJournalInfo><Country>Switzerland</Country><MedlineTA>Front Neurol</MedlineTA><NlmUniqueID>101546899</NlmUniqueID><ISSNLinking>1664-2295</ISSNLinking></MedlineJournalInfo><OtherID Source="NLM">PMC4259122</OtherID><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">dorsal and ventral streams</Keyword><Keyword MajorTopicYN="N">grasping</Keyword><Keyword MajorTopicYN="N">patient DF</Keyword><Keyword MajorTopicYN="N">perception and action</Keyword><Keyword MajorTopicYN="N">two visual systems hypothesis</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="ecollection"><Year>2014</Year><Month></Month><Day></Day></PubMedPubDate><PubMedPubDate PubStatus="received"><Year>2014</Year><Month>9</Month><Day>16</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2014</Year><Month>11</Month><Day>20</Day></PubMedPubDate><PubMedPubDate PubStatus="epublish"><Year>2014</Year><Month>12</Month><Day>08</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>12</Month><Day>25</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>12</Month><Day>30</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2014</Year><Month>12</Month><Day>30</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>epublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.3389/fneur.2014.00255</ArticleId><ArticleId IdType="pubmed">25538675</ArticleId><ArticleId IdType="pmc">PMC4259122</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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