Dynamics of event‐related causality in brain electrical activity

Korzeniewska, Anna; Crainiceanu, Ciprian M.; Kuś, Rafał; Franaszczuk, Piotr J.; Crone, Nathan E.

doi:10.1002/hbm.20458

Cited by 118 publications

(162 citation statements)

References 119 publications

(185 reference statements)

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“…The other smaller spot diffuses in a wider area after the period 0-1 second. These findings are not exactly similar to what was seen earlier [22] on invasive ECoG recordings. However, we are seeing a chronodynamic pattern in scalp EEG recordings during the covert object naming tasks that is somewhat similar to what was observed in ECoG recordings [22].…”

Section: Discussioncontrasting

confidence: 99%

“…These findings are not exactly similar to what was seen earlier [22] on invasive ECoG recordings. However, we are seeing a chronodynamic pattern in scalp EEG recordings during the covert object naming tasks that is somewhat similar to what was observed in ECoG recordings [22]. Our results suggest lateralization of the language area to the left hemisphere along with possible localization to the left anterior quadrant of the plots.…”

Section: Discussioncontrasting

confidence: 99%

“…High c band activity and its dynamic time-dependent behavior have also been examined with subdural electrocorticographic (ECoG) recordings [20][21][22]. In our results with scalp EEGs, we do see some very focused high c band activity related to the language and baseline.…”

Section: Discussionmentioning

confidence: 58%

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Power spectral density changes and language lateralization during covert object naming tasks measured with high-density EEG recordings

Ramon

Holmes

Freeman

et al. 2009

Epilepsy & Behavior

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a b s t r a c tOur objective was to study changes in EEG time-domain power spectral density (PSDt) and localization of language areas during covert object naming tasks in human subjects with epilepsy. EEG data for subjects with epilepsy were acquired during the covert object naming tasks using a net of 256 electrodes. The trials required each subject to provide the names of common objects presented every 4 seconds on slides. Each trial comprised the 1.0 second before and 3.0 seconds after initial object presentation. PSDt values at baseline and during tasks were calculated in the h, a, b, low c, and high c bands. The spatial contour plots reveal that PSDt values during object naming were 10-20% higher than the baseline values for different bands. Language was lateralized to left frontal or temporal areas. In all cases, the Wada test disclosed language lateralization to the left hemisphere as well.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussioncontrasting

confidence: 99%

See 1 more Smart Citation

Power spectral density changes and language lateralization during covert object naming tasks measured with high-density EEG recordings

Ramon

Holmes

Freeman

et al. 2009

Epilepsy & Behavior

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“…This kind of deterministic structure of brain activity should have an impact on functional connectivity, so a random or barely distinguishable from random connectivity structure reported in some works may be considered as a surprising phenomenon. When multivariate robust measures of connectivity are used a clear picture of functional connectivity emerges [19,20,24,25,27,28,51].…”

Section: Discussionmentioning

confidence: 99%

Application of directed transfer function and network formalism for the assessment of functional connectivity in working memory task

Blinowska

Kamiński

Brzezicka

et al. 2013

Phil. Trans. R. Soc. A.

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The dynamic pattern of functional connectivity during a working memory task was investigated by means of the short-time directed transfer function. A clear-cut picture of transmissions was observed with the main centres of propagation located in the frontal and parietal regions, in agreement with imaging studies and neurophysiological hypotheses concerning the mechanisms of working memory. The study of the time evolution revealed that most of the time short-range interactions prevailed, whereas the communication between the main centres of activity occurred more sparsely and changed dynamically in time. The patterns of connectivity were quantified by means of a network formalism based on assortative mixing-an approach novel in the field of brain networks study. By means of application of the above method, we have demonstrated the existence of a modular structure of brain networks. The strength of interaction inside the modules was higher than between modules. The obtained results are compatible with theories concerning metabolic energy saving and efficient wiring in the brain, which showed that preferred organization includes modular structure with dense connectivity inside the modules and more sparse connections between the modules.

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“…The multi-trial connectivity between CSDs was computed using the short time direct directed transfer function (SdDTF) (Korzeniewska et al, 2008). This method is a modification of the directed transfer function (DTF), based on the estimation of a multivariate autoregressive model (MVAR).…”

Section: Multi-trial Brain Connectivitymentioning

confidence: 99%

Discriminant brain connectivity patterns of performance monitoring at average and single-trial levels

2015

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Electrophysiological and neuroimaging evidence suggest the existence of common mechanisms for monitoring erroneous events, independent of the source of errors. Previous works have described modulations of theta activity in the medial frontal cortex elicited by either self-generated errors or erroneous feedback. In turn, similar patterns have recently been reported to appear after the observation of external errors. We report cross-regional interactions after observation of errors at both average and single-trial levels. We recorded scalp electroencephalography (EEG) signals from 15 subjects while monitoring the movement of a cursor on a computer screen. Connectivity patterns, estimated using multivariate auto-regressive models, show increased error-related modulations of the information transfer in the theta and alpha bands between frontocentral and frontolateral areas. Conversely, a decrease of connectivity in the beta band is also observed. These network patterns are similar to those elicited by self-generated errors. However, since no motor response is required, they appear to be related to intrinsic mechanisms of error processing, instead of being linked to co-activation of motor areas. Noticeably, we demonstrate that cross-regional interaction patterns can be estimated on a trial-by-trial basis. These trial-specific patterns, consistent with the multi-trial analysis, convey discriminant information on whether a trial was elicited by observation of an erroneous action. Overall, our study supports the role of frequency-specific modulations in the medial frontal cortex in coordinating cross-regional activity during cognitive monitoring at a single-trial basis.

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Dynamics of event‐related causality in brain electrical activity

Cited by 118 publications

References 119 publications

Power spectral density changes and language lateralization during covert object naming tasks measured with high-density EEG recordings

Power spectral density changes and language lateralization during covert object naming tasks measured with high-density EEG recordings

Application of directed transfer function and network formalism for the assessment of functional connectivity in working memory task

Discriminant brain connectivity patterns of performance monitoring at average and single-trial levels

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