Matches in SemOpenAlex for { <https://semopenalex.org/work/W2056590604> ?p ?o ?g. }
Showing items 1 to 71 of
71
with 100 items per page.
- W2056590604 endingPage "312" @default.
- W2056590604 startingPage "312" @default.
- W2056590604 abstract "Introduction: FMRI of asynchronous figure/ground structures has revealed a mechanism of top-down suppression from hMT+ to the stimulated background-representation in V1/V2 in the human brain (Likova & Tyler, 2005). Purpose and Methods: In order to (i) analyze the whole-brain figure/ground network and (ii) understand its neural dynamics, we employed a novel instantaneous-stimulation paradigm: We find that instantaneous refreshes in subregions of random-dot fields create distinct and prolonged percepts of spatial structure. Different transient spatial-configurations were generated by refreshing (i) only the figure region, (ii) only the background, (iii) the whole stimulus field, or (iv) figure then background in asynchronous fashion. FMRI responses were obtained throughout the brain in a GE Signa 3T scanner at 1.5 sec TR. The dynamics of the neural activation was determined by deconvolution of the BOLD signal with the standard estimate of the hemodynamic response function (HRF, defined as the transform from the neural response to the BOLD activation waveform). Results: Inter-condition comparisons revealed remarkable differences in one or more properties of the response waveform (latency, width, polarity, and number of phases), not only between, but within each individual cortical area. The instantaneous-stimulus paradigm generated a wide variety of BOLD signal waveforms and corresponding neural response estimates throughout a distributed network extending through the occipital, parietal and frontal cortex. Conclusions: Such distinct response waveforms within a given cortical region evoked by different conditions assure that the differences could be securely attributed to the neural dynamics, not to spatial variations in the HRF. Integrated analysis of the neural response reconstruction throughout the cortex enabled us to quantify the neural dynamics of the involved cortical areas. The activation pattern specific to figure/ground categorization implies a distributed recurrent architecture with functional feedback loops." @default.
- W2056590604 created "2016-06-24" @default.
- W2056590604 creator A5078257147 @default.
- W2056590604 creator A5079330023 @default.
- W2056590604 date "2010-03-19" @default.
- W2056590604 modified "2023-09-23" @default.
- W2056590604 title "Cortical network dynamics of figure/ground categorization" @default.
- W2056590604 doi "https://doi.org/10.1167/7.9.312" @default.
- W2056590604 hasPublicationYear "2010" @default.
- W2056590604 type Work @default.
- W2056590604 sameAs 2056590604 @default.
- W2056590604 citedByCount "0" @default.
- W2056590604 crossrefType "journal-article" @default.
- W2056590604 hasAuthorship W2056590604A5078257147 @default.
- W2056590604 hasAuthorship W2056590604A5079330023 @default.
- W2056590604 hasBestOaLocation W20565906041 @default.
- W2056590604 hasConcept C104319648 @default.
- W2056590604 hasConcept C11413529 @default.
- W2056590604 hasConcept C121332964 @default.
- W2056590604 hasConcept C153180895 @default.
- W2056590604 hasConcept C154945302 @default.
- W2056590604 hasConcept C15744967 @default.
- W2056590604 hasConcept C169760540 @default.
- W2056590604 hasConcept C174576160 @default.
- W2056590604 hasConcept C180747234 @default.
- W2056590604 hasConcept C197424946 @default.
- W2056590604 hasConcept C26760741 @default.
- W2056590604 hasConcept C2779226451 @default.
- W2056590604 hasConcept C2779918689 @default.
- W2056590604 hasConcept C41008148 @default.
- W2056590604 hasConcept C50231774 @default.
- W2056590604 hasConcept C554190296 @default.
- W2056590604 hasConcept C76155785 @default.
- W2056590604 hasConceptScore W2056590604C104319648 @default.
- W2056590604 hasConceptScore W2056590604C11413529 @default.
- W2056590604 hasConceptScore W2056590604C121332964 @default.
- W2056590604 hasConceptScore W2056590604C153180895 @default.
- W2056590604 hasConceptScore W2056590604C154945302 @default.
- W2056590604 hasConceptScore W2056590604C15744967 @default.
- W2056590604 hasConceptScore W2056590604C169760540 @default.
- W2056590604 hasConceptScore W2056590604C174576160 @default.
- W2056590604 hasConceptScore W2056590604C180747234 @default.
- W2056590604 hasConceptScore W2056590604C197424946 @default.
- W2056590604 hasConceptScore W2056590604C26760741 @default.
- W2056590604 hasConceptScore W2056590604C2779226451 @default.
- W2056590604 hasConceptScore W2056590604C2779918689 @default.
- W2056590604 hasConceptScore W2056590604C41008148 @default.
- W2056590604 hasConceptScore W2056590604C50231774 @default.
- W2056590604 hasConceptScore W2056590604C554190296 @default.
- W2056590604 hasConceptScore W2056590604C76155785 @default.
- W2056590604 hasIssue "9" @default.
- W2056590604 hasLocation W20565906041 @default.
- W2056590604 hasOpenAccess W2056590604 @default.
- W2056590604 hasPrimaryLocation W20565906041 @default.
- W2056590604 hasRelatedWork W2003188090 @default.
- W2056590604 hasRelatedWork W2010587277 @default.
- W2056590604 hasRelatedWork W2012870804 @default.
- W2056590604 hasRelatedWork W2050848588 @default.
- W2056590604 hasRelatedWork W2141460037 @default.
- W2056590604 hasRelatedWork W244352524 @default.
- W2056590604 hasRelatedWork W2463345136 @default.
- W2056590604 hasRelatedWork W2782444621 @default.
- W2056590604 hasRelatedWork W2969680539 @default.
- W2056590604 hasRelatedWork W3153849555 @default.
- W2056590604 hasVolume "7" @default.
- W2056590604 isParatext "false" @default.
- W2056590604 isRetracted "false" @default.
- W2056590604 magId "2056590604" @default.
- W2056590604 workType "article" @default.