Issues and considerations for using the scalp surface Laplacian in EEG/ERP research: A tutorial review

Kayser, Jürgen; Tenke, Craig E.

doi:10.1016/j.ijpsycho.2015.04.012

Cited by 208 publications

(188 citation statements)

References 125 publications

(227 reference statements)

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“…One major confounder is volume conduction, which has to be suspected especially when surface EEG signals were not spatially enhanced by Laplacian transformations (Kayser and Tenke, 2015). In the present study, no such transformation was applied due to the insufficient number of recording electrodes.…”

Section: Discussionmentioning

confidence: 91%

Synchronization of fronto-parietal beta and theta networks as a signature of visual awareness in neglect

et al. 2017

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The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. In the neglect syndrome, the perceptual deficit for contra-lesional hemi-space is increasingly viewed as a dysfunction of fronto-parietal cortical networks, the disruption of which has been described in neuroanatomical and hemodynamic studies. Here we exploit the superior temporal resolution of electroencephalography (EEG) to study dynamic transient connectivity of fronto-parietal circuits at early stages of visual perception in neglect. As reflected by interregional phase synchronization in a full-field attention task, two functionally distinct frontoparietal networks, in beta (15-25 Hz) and theta (4-8 Hz) frequency bands, were related to stimulus discrimination within the first 200 ms of visual processing. Neglect pathology was specifically associated with significant suppressions of both beta and theta networks engaging right parietal regions. These connectivity abnormalities occurred in a pattern that was distinctly different from what was observed in right-hemisphere lesion patients without neglect. Also, both beta and theta abnormalities contributed additively to visual awareness decrease, quantified in the Behavioural Inattention Test. These results provide evidence for the impairment of fast dynamic fronto-parietal interactions during early stages of visual processing in neglect pathology. Also, they reveal that different modes of fronto-parietal dysfunction contribute independently to deficits in visual awareness at the behavioural level.

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Section: Discussionmentioning

confidence: 91%

Synchronization of fronto-parietal beta and theta networks as a signature of visual awareness in neglect

et al. 2017

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“…Laplacian is a unique, linear data transformation that maintains the invariant (i.e., reference-independent) aspects of the EEG signal (see for a tutorial Kayser, 2015) Laplacian transform and ICA decomposition).…”

Section: Discussionmentioning

confidence: 99%

Being in the zone: Using behavioral and EEG recordings for the indirect assessment of flow

Castellar

Voigt-Antons

Marinazzo

et al. 2016

Preprint

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As such, video games are enjoyed most when the level and speed of the game match the players' skills. An optimal balance between challenges and skills triggers the subjective experience of "flow", a focused motivation leading to a feeling of spontaneous joy. Here we present the validation of a novel technique to indirectly assess the extent to which subjects experience flow during real game play by assessing attentional engagement; first behaviorally and in a second stage by means of electroencephalogram (EEG) recordings. An auditory novelty oddball paradigm was implemented as a secondary task while subjects played in three conditions: Boredom, Frustration and Flow. We found higher reaction times and error rates in the Flow condition. In a second stage we used advanced techniques to do source reconstruction and to investigate signal changes on both the temporal and frequency domain. EEG analysis revealed a response-locked fronto-central negative deflection significantly delayed during flow, likely signaling the need of re-allocation of attentional resources.Frequency domain analyses revealed significant power increase only in the alpha band for the flow condition. We believe that frontal alpha changes recorded as maximal at the mid-frontal lines during flow might be related with reward related processing. BEHAVIORAL AND EEG CORRELATES OF FLOWAccording to the Entertainment Software Association (ESA) $22.41 billion were spent by consumers on games in 2014 and it is estimated that about 155 million Americans play video games. Gamers who are playing more video games than they did three years ago are spending less time in mainstream activities such as watching T.V., going to the cinema and watching movies at home (ESA report, 2014).What makes the gaming experience much more fulfilling than other activities is the enjoyable nature of games. As such, video games evoke most pleasure when the level and speed of the game match the players' abilities e.g. optimal mental and motor capacity (Sherry, 2004). A perfect balance between challenges and skills during game play triggers the subjective experience of "flow", which can be defined as a cognitive state of being completely absorbed by an activity, accompanied by positive feelings.Csıkszentmihalyi (1988, 1990, 2000) described the subjective experience of flow as being associated with a number of unique affective and attentional states including feelings of motivation, high energy, immersion, and complete attentional focus. Whilst all these elements are characteristic of the emergence of flow, attentional processes are thought to be crucial. Boredom, and frustration, like flow, are determined by how attention is structured at a given time and by the balance between the challenges and skills of an individual (Csikszentmihalyi, 1992). Specifically, boredom arises when the subjects perceive low challenges mismatching their higher skills. Conversely, frustration emerges when subjects perceive high challenges mismatching their low skills. Both boredom and frustration ...

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“…A more precise measure can be obtained by applying a current source density (CSD) transformation to EEG signals. CSD refers to a group of mathematical transformations that compute estimates of the cortical current flowing radially through the skull Kayser & Tenke, 2015), providing a good approximation of the corticogram (Gevins et al, 1987). Contrary to the LRP, CSD methods allow isolation of the electrical activity from each M1.…”

Section: Linking Propositionsmentioning

confidence: 99%

Linking Theoretical Decision-making Mechanisms in the Simon Task with Electrophysiological Data: A Model-based Neuroscience Study in Humans

Servant

White

Montagnini

et al. 2016

Journal of Cognitive Neuroscience

103

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A current challenge for decision-making research is in extending models of simple decisions to more complex and ecological choice situations. Conflict tasks (e.g., Simon, Stroop, Eriksen flanker) have been the focus of much interest, because they provide a decision-making context representative of everyday life experiences. Modeling efforts have led to an elaborated drift diffusion model for conflict tasks (DMC), which implements a superimposition of automatic and controlled decision activations. The DMC has proven to capture the diversity of behavioral conflict effects across various task contexts. This study combined DMC predictions with EEG and EMG measurements to test a set of linking propositions that specify the relationship between theoretical decision-making mechanisms involved in the Simon task and brain activity. Our results are consistent with a representation of the superimposed decision variable in the primary motor cortices. The decision variable was also observed in the EMG activity of response agonist muscles. These findings provide new insight into the neurophysiology of human decision-making. In return, they provide support for the DMC model framework.

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Issues and considerations for using the scalp surface Laplacian in EEG/ERP research: A tutorial review

Cited by 208 publications

References 125 publications

Synchronization of fronto-parietal beta and theta networks as a signature of visual awareness in neglect

Synchronization of fronto-parietal beta and theta networks as a signature of visual awareness in neglect

Being in the zone: Using behavioral and EEG recordings for the indirect assessment of flow

Linking Theoretical Decision-making Mechanisms in the Simon Task with Electrophysiological Data: A Model-based Neuroscience Study in Humans

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