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Πεδίο DCΤιμήΓλώσσα
dc.contributor.authorKonstantinou, Nikos-
dc.contributor.authorBahrami, Bahador-
dc.contributor.authorRees, Geraint-
dc.contributor.authorLavie, Nilli-
dc.date.accessioned2020-03-19T18:53:15Z-
dc.date.available2020-03-19T18:53:15Z-
dc.date.issued2012-09-28-
dc.identifier.citationJournal of Cognitive Neuroscience, 2012, vol. 24, no. 11, pp. 2199-2210en_US
dc.description.abstractLoad Theory of attention suggests that high perceptual load in a task leads to reduced sensory visual cortex response to task-unrelated stimuli resulting in "load-induced blindness" [e.g., Lavie, N. Attention, distraction and cognitive control under load. Current Directions in Psychological Science, 19, 143-148, 2010; Lavie, N. Distracted and confused?: Selective attention under load. Trends in Cognitive Sciences, 9, 75-82, 2005]. Consideration of the findings that visual STM (VSTM) involves sensory recruitment [e.g., Pasternak, T., & Greenlee, M. Working memory in primate sensory systems. Nature Reviews Neuroscience, 6, 97-107, 2005] within Load Theory led us to a new hypothesis regarding the effects of VSTM load on visual processing. If VSTM load draws on sensory visual capacity, then similar to perceptual load, high VSTM load should also reduce visual cortex response to incoming stimuli leading to a failure to detect them. We tested this hypothesis with fMRI and behavioral measures of visual detection sensitivity. Participants detected the presence of a contrast increment during the maintenance delay in a VSTM task requiring maintenance of color and position. Increased VSTM load (manipulated by increased set size) led to reduced retinotopic visual cortex (V1-V3) responses to contrast as well as reduced detection sensitivity, as we predicted. Additional visual detection experiments established a clear tradeoff between the amount of information maintained in VSTM and detection sensitivity, while ruling out alternative accounts for the effects of VSTM load in terms of differential spatial allocation strategies or task difficulty. These findings extend Load Theory to demonstrate a new form of competitive interactions between early visual cortex processing and visual representations held in memory under load and provide a novel line of support for the sensory recruitment hypothesis of VSTM.en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.relation.ispartofJournal of Cognitive Neuroscienceen_US
dc.rights© The MIT Pressen_US
dc.subjectContrast sensitivityen_US
dc.subjectControlled clinical trialen_US
dc.titleVisual Short-Term Memory Load Reduces Retinotopic Cortex Response to Contrasten_US
dc.typeArticleen_US
dc.collaborationUniversity of Cyprusen_US
dc.subject.categoryOther Medical Sciencesen_US
dc.journalsSubscriptionen_US
dc.countryCyprusen_US
dc.subject.fieldMedical and Health Sciencesen_US
dc.publicationPeer Revieweden_US
dc.identifier.doi10.1162/jocn_a_00279en_US
dc.identifier.pmid22905823-
dc.identifier.scopus2-s2.0-84867115089-
dc.identifier.urlhttps://api.elsevier.com/content/abstract/scopus_id/84867115089-
dc.relation.issue11en_US
dc.relation.volume24en_US
cut.common.academicyear2012-2013en_US
dc.identifier.spage2199en_US
dc.identifier.epage2210en_US
item.fulltextNo Fulltext-
item.languageiso639-1en-
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.cerifentitytypePublications-
item.openairetypearticle-
crisitem.journal.journalissn1530-8898-
crisitem.journal.publisherMIT Press-
crisitem.author.deptDepartment of Rehabilitation Sciences-
crisitem.author.facultyFaculty of Health Sciences-
crisitem.author.orcid0000-0003-4531-3636-
crisitem.author.parentorgFaculty of Health Sciences-
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