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dc.contributor.author
Sigman, Mariano
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dc.contributor.author
Jobert, A.
dc.contributor.author
LeBihan, D.
dc.contributor.author
Dehaene, Stanislas
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dc.date.available
2019-01-07T13:56:56Z
dc.date.issued
2007-12
dc.identifier.citation
Sigman, Mariano; Jobert, A.; LeBihan, D.; Dehaene, Stanislas; Parsing a sequence of brain activations at psychological times using fMRI; Academic Press Inc Elsevier Science; Journal Neuroimag; 35; 2; 12-2007; 655-668
dc.identifier.issn
1053-8119
dc.identifier.uri
http://hdl.handle.net/11336/67505
dc.description.abstract
Identifying the sequence of computations which constitute a cognitive task is a fundamental problem in neuroscience. Here we show, using functional magnetic resonance imaging (fMRI), that we can parse, at the time scale of about 100 ms, the different stages of brain activations which compose a complex sequential task. To identify timing information from the slow blood oxygen level-dependent (BOLD) signal response, we use a simple analytic method, based on periodic stimulation and an analysis of covariation of the spectral parameters (phase and power spectrum at the stimulation frequency) with the different experimental conditions. We implement this strategy in a sequential task, where the onset and duration of different stages are under experimental control. We are able to detect changes in onset latency and in the duration of the response, in an invariant fashion across different brain regions, and reconstruct the stream of activations consistent with five distinct stages of processing of the task. Sensory and motor clusters activate in the expected order and for the expected duration. The timing of sensory activations is more precise than the timing of motor activation. We also parse in time the reading-verbal network: visual extrastriate and phonological access regions (supramarginal gyrus) activate at the time of word presentation, while the inferior frontal gyrus, the anterior cingulate and the supplementary motor area are activated during the rehearsal period. © 2006 Elsevier Inc. All rights reserved.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Academic Press Inc Elsevier Science
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Additive Factors
dc.subject
Cognitive
dc.subject
Fmri
dc.subject
Language
dc.subject
Sequences
dc.subject
Timing
dc.subject.classification
Otras Ciencias Biológicas
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Parsing a sequence of brain activations at psychological times using fMRI
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-01-02T19:33:45Z
dc.journal.volume
35
dc.journal.number
2
dc.journal.pagination
655-668
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Sigman, Mariano. Inserm; Francia. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
dc.description.fil
Fil: Jobert, A.. Inserm; Francia
dc.description.fil
Fil: LeBihan, D.. Inserm; Francia
dc.description.fil
Fil: Dehaene, Stanislas. Inserm; Francia
dc.journal.title
Journal Neuroimag
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.neuroimage.2006.05.064
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