Phase Synchronization Analysis of EEG during Attentional Blink

Nakatani, Chie; Ito, Junji; Nikolaev, Andrey R.; Gong, Pulin; Leeuwen, Cees van

doi:10.1162/089892905775008706

Cited by 39 publications

(36 citation statements)

References 28 publications

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“…AB-induced decreases in long-range phase synchronization in the beta and gamma band encompassing the frontoparietal attention network have been reported by Kranczioch, Debener, Maye, and Engel (2007), Nakatani, Ito, Nikolaev, Gong, and van Leeuwen (2005), and Gross et al (2004). These modulations were consistently observed before T1 onset, a pattern akin to spontaneous trialby-trial fluctuations in alpha band (de)synchronization which has been proposed to index an anticipatory mental state related to successful identification of RSVP targets (MacLean & Arnell, 2011;see Hanslmayr, Gross, Klimesch, & Shapiro, 2011, for a review).…”

Section: Introductionmentioning

confidence: 85%

The Attentional Blink Impairs Detection and Delays Encoding of Visual Information: Evidence from Human Electrophysiology

Dell’Acqua

Dux

Wyble

et al. 2015

Journal of Cognitive Neuroscience

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Abstract■ This article explores the time course of the functional interplay between detection and encoding stages of information processing in the brain and the role they play in conscious visual perception. We employed a multitarget rapid serial visual presentation (RSVP) approach and examined the electrophysiological P3 component elicited by a target terminating an RSVP sequence. Target-locked P3 activity was detected both at frontal and parietal recording sites and an independent component analysis confirmed the presence of two distinct P3 components. The posterior P3b varied with intertarget lag, with diminished amplitude and postponed latency at short relative to long lagsan electroencephalographic signature of the attentional blink (AB). Under analogous conditions, the anterior P3a was also reduced in amplitude but did not vary in latency. Collectively, the results provide an electrophysiological record of the interaction between frontal and posterior components linked to detection (P3a) and encoding (P3b) of visual information. Our findings suggest that, although the AB delays target encoding into working memory, it does not slow down detection of a target but instead reduces the efficacy of this process. A functional characterization of P3a in attentive tasks is discussed with reference to current models of the AB phenomenon. ■

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Section: Introductionmentioning

confidence: 85%

The Attentional Blink Impairs Detection and Delays Encoding of Visual Information: Evidence from Human Electrophysiology

Dell’Acqua

Dux

Wyble

et al. 2015

Journal of Cognitive Neuroscience

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“…When we become conscious of an event, there is evidence of synchronized activity between widely separated brain regions, particularly within the thalamocortical system (Rodriguez et al, 1999;Srinivasan et al, 1999;Tononi, 2004Tononi, , 2005. Brief periods of synchronization of oscillating neuronal firing in the gamma range (30-80 Hz) may be an integrative mechanism that brings together a widely distributed group of neurons into a coherent assembly that underlies a cognitive act (Balconi & Lucchiari, 2008;Engle & Singer, 2001;Gross et al, 2004;Meador, Ray, Echauz, Loring, & Vachtsevanos, 2002;Melloni et al, 2007;Nakatani, Ito, Nikolaev, Gong, & van Leeuwen, 2005;Palva, Linkenkaer-Hansen, Naatanen, & Palva, 2005;Rodriguez et al, 1999) and correlates with conscious perception (Doesburg, Kitajo, & Ward, 2005;Fries, Roelfsema, Engel, Konig, & Singer, 1997;Fries, Schroeder, Roelfsema, Singer, & Engel, 2002;Srinivasan et al, 1999).…”

Section: The Neural Basis Of Conscious Vs Unconscious Processesmentioning

confidence: 99%

The Neural Basis of the Dynamic Unconscious

Berlin

2011

Neuropsychoanalysis

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A great deal of complex cognitive processing occurs at the unconscious level and affects how humans behave, think, and feel. Scientists are only now beginning to understand how this occurs on the neural level. Understanding the neural basis of consciousness requires an account of the neural mechanisms that underlie both conscious and unconscious thought, and their dynamic interaction. For example, how do conscious impulses, thoughts, or desires become unconscious (e.g., repression) or, conversely, how do unconscious impulses, desires, or motives become conscious (e.g., Freudian slips)? Research taking advantage of advances in technologies, like functional magnetic resonance imaging, has led to a revival and re-conceptualization of some of the key concepts of psychoanalytic theory, but steps toward understanding their neural basis have only just commenced. According to psychoanalytic theory, unconscious dynamic processes defensively remove anxiety-provoking thoughts and impulses from consciousness in response to one's conflicting attitudes. The processes that keep unwanted thoughts from entering consciousness include repression, suppression, and dissociation. In this literature review, studies from psychology and cognitive neuroscience in both healthy and patient populations that are beginning to elucidate the neural basis of these phenomena are discussed and organized within a conceptual framework. Further studies in this emerging field at the intersection of psychoanalytic theory and neuroscience are needed.Keywords: unconscious; psychodynamic; repression; suppression; dissociation; neural "Nothing is so difficult as not deceiving oneself."Ludwig Wittgenstein Cognitive unconscious processingThe intricate relationship between conscious and unconscious processes is one of the many mysteries that continue to perplex our understanding of ourselves.

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“…The neural signature of unconscious perception would be local coordination of neural activity and propagation along sensory processing pathways, whereas conscious perception would require global coordination of widely distributed neural activity by long-distance synchronization (Dehaene et al, 2006). Indeed, ␤ and gamma frequency band phase synchrony is enhanced for consciously perceived stimuli (Meador et al, 2002;Gross et al, 2004;Nakatani et al, 2005;Palva et al, 2005) and correlates with conscious perception in binocular rivalry (Fries et al, 1997(Fries et al, , 2002Srinivasan et al, 1999;Doesburg et al, 2005). However, these studies have investigated synchronization in spatially restricted neural assemblies, or without distinguishing between local and global coordination.…”

Section: Introductionmentioning

confidence: 99%

Synchronization of Neural Activity across Cortical Areas Correlates with Conscious Perception

Melloni¹,

Molina²,

Peña³

et al. 2007

J. Neurosci.

639

434

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Subliminal stimuli can be deeply processed and activate similar brain areas as consciously perceived stimuli. This raises the question which signatures of neural activity critically differentiate conscious from unconscious processing. Transient synchronization of neural activity has been proposed as a neural correlate of conscious perception. Here we test this proposal by comparing the electrophysiological responses related to the processing of visible and invisible words in a delayed matching to sample task. Both perceived and nonperceived words caused a similar increase of local (gamma) oscillations in the EEG, but only perceived words induced a transient long-distance synchronization of gamma oscillations across widely separated regions of the brain. After this transient period of temporal coordination, the electrographic signatures of conscious and unconscious processes continue to diverge. Only words reported as perceived induced (1) enhanced theta oscillations over frontal regions during the maintenance interval, (2) an increase of the P300 component of the eventrelated potential, and (3) an increase in power and phase synchrony of gamma oscillations before the anticipated presentation of the test word. We propose that the critical process mediating the access to conscious perception is the early transient global increase of phase synchrony of oscillatory activity in the gamma frequency range.

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Phase Synchronization Analysis of EEG during Attentional Blink

Cited by 39 publications

References 28 publications

The Attentional Blink Impairs Detection and Delays Encoding of Visual Information: Evidence from Human Electrophysiology

The Attentional Blink Impairs Detection and Delays Encoding of Visual Information: Evidence from Human Electrophysiology

The Neural Basis of the Dynamic Unconscious

Synchronization of Neural Activity across Cortical Areas Correlates with Conscious Perception

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