Gamma-band MEG activity to coherent motion depends on task-driven attention

Sokolov, Alexander N.; Lutzenberger, Werner; Pavlova, Marina; Preißl, Hubert; Bartmann, Christoph; Birbaumer, Niels

doi:10.1097/00001756-199907130-00001

Cited by 47 publications

(24 citation statements)

References 2 publications

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“…Keil et al, 1999;Rodriguez et al, 1999;TallonBaudry, Bertrand, Wienbruch, Ross, & Pantev, 1997;Müller et al, 1996;Müller, Junghöfer, Elbert, & Rockstroh, 1997;Lutzenberger et al, 1995;Tallon, Bertrand, Bouchet, & Pernier, 1995). In our previous experiments we have demonstrated that induced GBRs in the human EEG were significantly increased when subjects attended to a visual stimulus at a certain location compared to when that stimulus was unattended (Müller, Gruber, & Keil, 2000;Gruber et al, 1999), which was confirmed and extended to cross-modal attention in a recent MEG study (Sokolov et al, 1999). Animal studies based on tactile attention suggested that attending to a stimulus is linked to an increase of synchrony of neural activity in the somatosensory and motor cortex (Murthy & Fetz, 1992;Murthy, Aoki, & Fetz, 1994) and between cells in the secondary somatosensory cortex (Steinmetz et al, 2000) of the monkey brain.…”

Section: Introductionsupporting

confidence: 71%

Neuronal Synchronization and Selective Color Processing in the Human Brain

Müller

Keil

2004

Journal of Cognitive Neuroscience

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& In the present study, subjects selectively attended to the color of checkerboards in a feature-based attention paradigm. Induced gamma band responses (GBRs), the induced alpha band, and the event-related potential (ERP) were analyzed to uncover neuronal dynamics during selective feature processing. Replicating previous ERP findings, the selection negativity (SN) with a latency of about 160 msec was extracted. Furthermore, and similarly to previous EEG studies, a gamma band peak in a time window between 290 and 380 msec was found. This peak had its major energy in the 55-to 70-Hz range and was significantly larger for the attended color. Contrary to previous human induced gamma band studies, a much earlier 40-to 50-Hz peak in a time window between 160 and 220 msec after stimulus onset and, thus, concurrently to the SN was prominent with significantly more energy for attended as opposed to unattended color. The induced alpha band (9.8-11.7 Hz), on the other hand, exhibited a marked suppression for attended color in a time window between 450 and 600 msec after stimulus onset. A comparison of the time course of the 40-to 50-Hz and 55-to 70-Hz induced GBR, the induced alpha band, and the ERP revealed temporal coincidences for changes in the morphology of these brain responses. Despite these similarities in the time domain, the cortical source configuration was found to discriminate between induced GBRs and the SN. Our results suggest that large-scale synchronous high-frequency brain activity as measured in the human GBR play a specific role in attentive processing of stimulus features. &

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Section: Introductionsupporting

confidence: 71%

Neuronal Synchronization and Selective Color Processing in the Human Brain

Müller

Keil

2004

Journal of Cognitive Neuroscience

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“…Advances in neuroimaging technologies such as the hemodynamic functional imaging methodologies (fMRI and PET) and the ability to conduct high-density multi-channel electro- and magneto- encephalographic recordings (EEG and MEG) have allowed for unprecedented advances in our understanding of the physiology of human selective attention. This report specifically addresses evidence for the role of oscillatory brain mechanisms in selective attention (e.g., Vanni et al, 1997; Foxe et al, 1998; Gruber et al, 1999; Shibata et al, 1999; Sokolov et al, 1999; Worden et al, 2000; Sauseng et al, 2005; Yamagishi et al, 2005; Kelly et al, 2006; Thut et al, 2006; Rihs et al, 2007; Snyder and Foxe, 2010). …”

mentioning

confidence: 86%

“…Some evidence suggests that one correlate of the first variety of attention, enhancement of neural processing for stimuli at the focus of attention, is the selective modulation of evoked gamma-band oscillatory activity (e.g., Gruber et al, 1999; Shibata et al, 1999; Sokolov et al, 1999; Fries et al, 2001). The evoked gamma-band response has been implicated as a neural mechanism for feature binding (e.g., Singer, 1993, 1999), and these studies have suggested that this binding function can be selectively invoked during attention tasks.…”

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confidence: 99%

The Role of Alpha-Band Brain Oscillations as a Sensory Suppression Mechanism during Selective Attention

Foxe¹,

Snyder²

2011

Front. Psychology

1,115

938

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Evidence has amassed from both animal intracranial recordings and human electrophysiology that neural oscillatory mechanisms play a critical role in a number of cognitive functions such as learning, memory, feature binding and sensory gating. The wide availability of high-density electrical and magnetic recordings (64–256 channels) over the past two decades has allowed for renewed efforts in the characterization and localization of these rhythms. A variety of cognitive effects that are associated with specific brain oscillations have been reported, which range in spectral, temporal, and spatial characteristics depending on the context. Our laboratory has focused on investigating the role of alpha-band oscillatory activity (8–14 Hz) as a potential attentional suppression mechanism, and this particular oscillatory attention mechanism will be the focus of the current review. We discuss findings in the context of intersensory selective attention as well as intrasensory spatial and feature-based attention in the visual, auditory, and tactile domains. The weight of evidence suggests that alpha-band oscillations can be actively invoked within cortical regions across multiple sensory systems, particularly when these regions are involved in processing irrelevant or distracting information. That is, a central role for alpha seems to be as an attentional suppression mechanism when objects or features need to be specifically ignored or selected against.

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“…Fell et al (2002) reasoned that a process linked to T1 processing and indexed by the T1-related P3 impairs a T2 related process indexed by the early evoked gamma response to T2. The early evoked gamma response has been suggested to be necessary for attention allocation to a selected object and therefore for stimulus discrimination and target selection/identification (Debener, Herrmann, Kranczioch, Gembris, & Engel, 2003; Fell et al, 2002; Herrmann & Knight, 2001; Herrmann & Mecklinger, 2000, 2001; Sokolov et al, 1999; Tiitinen, May, & Näätänen, 1997; Tiitinen, Sinkkonen, May, & Näätänen, 1994). Based on the observations that (a) the AB reaches its peak at a T1-T2 interval of about 300 ms and that (b) the T1-related P3 had a peak latency of about 400 ms (McArthur, Budd, & Michie, 1999), the T2-related process was hypothesized to have a latency of about 100 ms. Because research failed to find impairments in ERPs occurring in this time period (Vogel et al, 1998), Fell et al (2002) suggested that it is the early evoked gamma response that is impaired.…”

Section: Oscillatory Activity In the Attentional Blinkmentioning

confidence: 99%

Good vibrations, bad vibrations: Oscillatory brain activity in the attentional blink

Janson

Kranczioch

2011

Advances in Cognitive Psychology

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The attentional blink (AB) is a deficit in reporting the second (T2) of two targets (T1, T2) when presented in close temporal succession and within a stream of distractor stimuli. The AB has received a great deal of attention in the past two decades because it allows to study the mechanisms that influence the rate and depth of information processing in various setups and therefore provides an elegant way to study correlates of conscious perception in supra-threshold stimuli. Recently evidence has accumulated suggesting that oscillatory signals play a significant role in temporally coordinating information between brain areas. This review focuses on studies looking into oscillatory brain activity in the AB. The results of these studies indicate that the AB is related to modulations in oscillatory brain activity in the theta, alpha, beta, and gamma frequency bands. These modulations are sometimes restricted to a circumscribed brain area but more frequently include several brain regions. They occur before targets are presented as well as after the presentation of the targets. We will argue that the complexity of the findings supports the idea that the AB is not the result of a processing impairment in one particular process or brain area, but the consequence of a dynamic interplay between several processes and/or parts of a neural network.

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Gamma-band MEG activity to coherent motion depends on task-driven attention

Cited by 47 publications

References 2 publications

Neuronal Synchronization and Selective Color Processing in the Human Brain

Neuronal Synchronization and Selective Color Processing in the Human Brain

The Role of Alpha-Band Brain Oscillations as a Sensory Suppression Mechanism during Selective Attention

Good vibrations, bad vibrations: Oscillatory brain activity in the attentional blink

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