The threshold for conscious report
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The threshold for conscious report : Signal loss and response bias in visual and frontal cortex. / van Vugt, Bram; Dagnino, Bruno; Vartak, Devavrat; Safaai, Houman; Panzeri, Stefano; Dehaene, Stanislas; Roelfsema, Pieter R.
in: SCIENCE, Jahrgang 360, Nr. 6388, 04.05.2018, S. 537-542.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - The threshold for conscious report
T2 - Signal loss and response bias in visual and frontal cortex
AU - van Vugt, Bram
AU - Dagnino, Bruno
AU - Vartak, Devavrat
AU - Safaai, Houman
AU - Panzeri, Stefano
AU - Dehaene, Stanislas
AU - Roelfsema, Pieter R
N1 - Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.
PY - 2018/5/4
Y1 - 2018/5/4
N2 - Why are some visual stimuli consciously detected, whereas others remain subliminal? We investigated the fate of weak visual stimuli in the visual and frontal cortex of awake monkeys trained to report stimulus presence. Reported stimuli were associated with strong sustained activity in the frontal cortex, and frontal activity was weaker and quickly decayed for unreported stimuli. Information about weak stimuli could be lost at successive stages en route from the visual to the frontal cortex, and these propagation failures were confirmed through microstimulation of area V1. Fluctuations in response bias and sensitivity during perception of identical stimuli were traced back to prestimulus brain-state markers. A model in which stimuli become consciously reportable when they elicit a nonlinear ignition process in higher cortical areas explained our results.
AB - Why are some visual stimuli consciously detected, whereas others remain subliminal? We investigated the fate of weak visual stimuli in the visual and frontal cortex of awake monkeys trained to report stimulus presence. Reported stimuli were associated with strong sustained activity in the frontal cortex, and frontal activity was weaker and quickly decayed for unreported stimuli. Information about weak stimuli could be lost at successive stages en route from the visual to the frontal cortex, and these propagation failures were confirmed through microstimulation of area V1. Fluctuations in response bias and sensitivity during perception of identical stimuli were traced back to prestimulus brain-state markers. A model in which stimuli become consciously reportable when they elicit a nonlinear ignition process in higher cortical areas explained our results.
KW - Animals
KW - Consciousness/physiology
KW - Frontal Lobe/physiology
KW - Macaca mulatta
KW - Male
KW - Models, Neurological
KW - Photic Stimulation
KW - Visual Cortex/physiology
KW - Visual Perception/physiology
U2 - 10.1126/science.aar7186
DO - 10.1126/science.aar7186
M3 - SCORING: Journal article
C2 - 29567809
VL - 360
SP - 537
EP - 542
JO - SCIENCE
JF - SCIENCE
SN - 0036-8075
IS - 6388
ER -