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Abstract:

The psychological refractory period (PRP) refers to the fact that humans typically cannot perform two tasks at once. Behavioral experiments have led to the proposal that, in fact, peripheral perceptual and motor stages continue to operate in parallel, and that only a central decision stage imposes a serial bottleneck. We tested this model using neuroimaging methods combined with innovative time-sensitive analysis tools. Subjects performed a dual-task visual-auditory paradigm in which a delay of 300 ms was injected into the auditory task either within or outside of the dual-task interference period. Event-related potentials indicated that the first ∼250 ms of processing were insensitive to dual-task interference, and that the PRP was mainly reflected in a delayed global component. By a clustering analysis based on time-resolved functional magnetic resonance imaging, we identified networks with qualitatively different timing properties: sensory areas tracked the objective time of stimulus presentation, a bilateral parietoprefrontal network correlated with the PRP delay, and an extended bilateral network that included bilateral posterior parietal cortex, premotor cortex, supplementary motor area, anterior part of the insula, and cerebellum was shared by both tasks during the extent of dual-task performance. The results provide physiological evidence for the coexistence of serial and parallel processes within a cognitive task. Copyright © 2008 Society for Neuroscience.

Registro:

Documento: Artículo
Título:Brain mechanisms of serial and parallel processing during dual-task performance
Autor:Sigman, M.; Dehaene, S.
Filiación:Integrative Neuroscience Laboratory, Physics Department, University of Buenos Aires, 1428 Buenos Aires, Argentina
Collège de France, 75231 Paris, France
Inserm, Cognitive Neuroimaging Unit, Commissariat À l'Energie Atomique, 91191 Saclay, France
Physics Department, University of Buenos Aires, University City, 1428 Buenos Aires, Argentina
Palabras clave:Bottleneck; Brain dynamics; Cognitive architecture; EEG; fMRI; PRP; adult; article; auditory system; cerebellum; cluster analysis; cognition; controlled study; electroencephalography; female; functional magnetic resonance imaging; human; human experiment; insula; male; motor cortex; neuroimaging; normal human; parietal lobe; prefrontal cortex; premotor cortex; priority journal; psychological refractory period; qualitative analysis; task performance; visual system; auditory stimulation; blood; brain; brain mapping; evoked response; hearing; image processing; learning; methodology; nuclear magnetic resonance imaging; photostimulation; physiology; prediction and forecasting; principal component analysis; psychological model; reaction time; task performance; vascularization; vision; oxygen; Acoustic Stimulation; Adult; Auditory Perception; Brain; Brain Mapping; Electroencephalography; Evoked Potentials; Female; Humans; Image Processing, Computer-Assisted; Magnetic Resonance Imaging; Male; Models, Psychological; Oxygen; Photic Stimulation; Practice (Psychology); Predictive Value of Tests; Principal Component Analysis; Reaction Time; Refractory Period, Psychological; Task Performance and Analysis; Visual Perception
Año:2008
Volumen:28
Número:30
Página de inicio:7585
Página de fin:7598
DOI: http://dx.doi.org/10.1523/JNEUROSCI.0948-08.2008
Título revista:Journal of Neuroscience
Título revista abreviado:J. Neurosci.
ISSN:02706474
CODEN:JNRSD
CAS:oxygen, 7782-44-7; Oxygen, 7782-44-7
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02706474_v28_n30_p7585_Sigman

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Citas:

---------- APA ----------
Sigman, M. & Dehaene, S. (2008) . Brain mechanisms of serial and parallel processing during dual-task performance. Journal of Neuroscience, 28(30), 7585-7598.
http://dx.doi.org/10.1523/JNEUROSCI.0948-08.2008
---------- CHICAGO ----------
Sigman, M., Dehaene, S. "Brain mechanisms of serial and parallel processing during dual-task performance" . Journal of Neuroscience 28, no. 30 (2008) : 7585-7598.
http://dx.doi.org/10.1523/JNEUROSCI.0948-08.2008
---------- MLA ----------
Sigman, M., Dehaene, S. "Brain mechanisms of serial and parallel processing during dual-task performance" . Journal of Neuroscience, vol. 28, no. 30, 2008, pp. 7585-7598.
http://dx.doi.org/10.1523/JNEUROSCI.0948-08.2008
---------- VANCOUVER ----------
Sigman, M., Dehaene, S. Brain mechanisms of serial and parallel processing during dual-task performance. J. Neurosci. 2008;28(30):7585-7598.
http://dx.doi.org/10.1523/JNEUROSCI.0948-08.2008