A shared cortical bottleneck underlying attentional blink and psychological refractory period
Doing two things at once is difficult. When two tasks have to be performed within a short interval, the second is sharply delayed, an effect called the Psychological Refractory Period (PRP). Similarly, when two successive visual targets are briefly flashed, people may fail to detect the second targe...
| Publicado: |
2012
|
|---|---|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10538119_v59_n3_p2883_Marti http://hdl.handle.net/20.500.12110/paper_10538119_v59_n3_p2883_Marti |
| Aporte de: |
| id |
paper:paper_10538119_v59_n3_p2883_Marti |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_10538119_v59_n3_p2883_Marti2023-06-08T16:03:03Z A shared cortical bottleneck underlying attentional blink and psychological refractory period Attention Attentional blink Consciousness Dual-task Magnetoencephalography Psychological refractory period adult article attentional blink auditory stimulation brain function consciousness controlled study cortical bottleneck event related potential female frontal cortex human human experiment magnetoencephalography male nervous system parameters normal human nuclear magnetic resonance imaging occipital cortex priority journal psychological refractory period stimulus response temporal cortex visual stimulation Acoustic Stimulation Adult Attention Auditory Perception Blinking Cerebral Cortex Data Interpretation, Statistical Female Frontal Lobe Humans Image Processing, Computer-Assisted Magnetic Resonance Imaging Magnetoencephalography Male Parietal Lobe Photic Stimulation Psychomotor Performance Refractory Period, Psychological Regression Analysis Somatosensory Cortex Visual Perception Young Adult Doing two things at once is difficult. When two tasks have to be performed within a short interval, the second is sharply delayed, an effect called the Psychological Refractory Period (PRP). Similarly, when two successive visual targets are briefly flashed, people may fail to detect the second target (Attentional Blink or AB). Although AB and PRP are typically studied in very different paradigms, a recent detailed neuromimetic model suggests that both might arise from the same serial stage during which stimuli gain access to consciousness and, as a result, can be arbitrarily routed to any other appropriate processor. Here, in agreement with this model, we demonstrate that AB and PRP can be obtained on alternate trials of the same cross-modal paradigm and result from limitations in the same brain mechanisms. We asked participants to respond as fast as possible to an auditory target T1 and then to a visual target T2 embedded in a series of distractors, while brain activity was recorded with magneto-encephalography (MEG). For identical stimuli, we observed a mixture of blinked trials, where T2 was entirely missed, and PRP trials, where T2 processing was delayed. MEG recordings showed that PRP and blinked trials underwent identical sensory processing in visual occipito-temporal cortices, even including the non-conscious separation of targets from distractors. However, late activations in frontal cortex (> 350 ms), strongly influenced by the speed of task-1 execution, were delayed in PRP trials and absent in blinked trials. Our findings suggest that PRP and AB arise from similar cortical stages, can occur with the same exact stimuli, and are merely distinguished by trial-by-trial fluctuations in task processing. © 2011 Elsevier Inc. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10538119_v59_n3_p2883_Marti http://hdl.handle.net/20.500.12110/paper_10538119_v59_n3_p2883_Marti |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Attention Attentional blink Consciousness Dual-task Magnetoencephalography Psychological refractory period adult article attentional blink auditory stimulation brain function consciousness controlled study cortical bottleneck event related potential female frontal cortex human human experiment magnetoencephalography male nervous system parameters normal human nuclear magnetic resonance imaging occipital cortex priority journal psychological refractory period stimulus response temporal cortex visual stimulation Acoustic Stimulation Adult Attention Auditory Perception Blinking Cerebral Cortex Data Interpretation, Statistical Female Frontal Lobe Humans Image Processing, Computer-Assisted Magnetic Resonance Imaging Magnetoencephalography Male Parietal Lobe Photic Stimulation Psychomotor Performance Refractory Period, Psychological Regression Analysis Somatosensory Cortex Visual Perception Young Adult |
| spellingShingle |
Attention Attentional blink Consciousness Dual-task Magnetoencephalography Psychological refractory period adult article attentional blink auditory stimulation brain function consciousness controlled study cortical bottleneck event related potential female frontal cortex human human experiment magnetoencephalography male nervous system parameters normal human nuclear magnetic resonance imaging occipital cortex priority journal psychological refractory period stimulus response temporal cortex visual stimulation Acoustic Stimulation Adult Attention Auditory Perception Blinking Cerebral Cortex Data Interpretation, Statistical Female Frontal Lobe Humans Image Processing, Computer-Assisted Magnetic Resonance Imaging Magnetoencephalography Male Parietal Lobe Photic Stimulation Psychomotor Performance Refractory Period, Psychological Regression Analysis Somatosensory Cortex Visual Perception Young Adult A shared cortical bottleneck underlying attentional blink and psychological refractory period |
| topic_facet |
Attention Attentional blink Consciousness Dual-task Magnetoencephalography Psychological refractory period adult article attentional blink auditory stimulation brain function consciousness controlled study cortical bottleneck event related potential female frontal cortex human human experiment magnetoencephalography male nervous system parameters normal human nuclear magnetic resonance imaging occipital cortex priority journal psychological refractory period stimulus response temporal cortex visual stimulation Acoustic Stimulation Adult Attention Auditory Perception Blinking Cerebral Cortex Data Interpretation, Statistical Female Frontal Lobe Humans Image Processing, Computer-Assisted Magnetic Resonance Imaging Magnetoencephalography Male Parietal Lobe Photic Stimulation Psychomotor Performance Refractory Period, Psychological Regression Analysis Somatosensory Cortex Visual Perception Young Adult |
| description |
Doing two things at once is difficult. When two tasks have to be performed within a short interval, the second is sharply delayed, an effect called the Psychological Refractory Period (PRP). Similarly, when two successive visual targets are briefly flashed, people may fail to detect the second target (Attentional Blink or AB). Although AB and PRP are typically studied in very different paradigms, a recent detailed neuromimetic model suggests that both might arise from the same serial stage during which stimuli gain access to consciousness and, as a result, can be arbitrarily routed to any other appropriate processor. Here, in agreement with this model, we demonstrate that AB and PRP can be obtained on alternate trials of the same cross-modal paradigm and result from limitations in the same brain mechanisms. We asked participants to respond as fast as possible to an auditory target T1 and then to a visual target T2 embedded in a series of distractors, while brain activity was recorded with magneto-encephalography (MEG). For identical stimuli, we observed a mixture of blinked trials, where T2 was entirely missed, and PRP trials, where T2 processing was delayed. MEG recordings showed that PRP and blinked trials underwent identical sensory processing in visual occipito-temporal cortices, even including the non-conscious separation of targets from distractors. However, late activations in frontal cortex (> 350 ms), strongly influenced by the speed of task-1 execution, were delayed in PRP trials and absent in blinked trials. Our findings suggest that PRP and AB arise from similar cortical stages, can occur with the same exact stimuli, and are merely distinguished by trial-by-trial fluctuations in task processing. © 2011 Elsevier Inc. |
| title |
A shared cortical bottleneck underlying attentional blink and psychological refractory period |
| title_short |
A shared cortical bottleneck underlying attentional blink and psychological refractory period |
| title_full |
A shared cortical bottleneck underlying attentional blink and psychological refractory period |
| title_fullStr |
A shared cortical bottleneck underlying attentional blink and psychological refractory period |
| title_full_unstemmed |
A shared cortical bottleneck underlying attentional blink and psychological refractory period |
| title_sort |
shared cortical bottleneck underlying attentional blink and psychological refractory period |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10538119_v59_n3_p2883_Marti http://hdl.handle.net/20.500.12110/paper_10538119_v59_n3_p2883_Marti |
| _version_ |
1768545385059450880 |