Journal ArticleDOI
Transmission of Brain Activity During Cognitive Task
Reads0
Chats0
TLDR
The transmission of brain activity during constant attention test was estimated by means of the short-time directed transfer function (SDTF), an estimator based on a multivariate autoregressive model that determines the propagation as a function of time and frequency.Abstract:
The transmission of brain activity during constant attention test was estimated by means of the short-time directed transfer function (SDTF). SDTF is an estimator based on a multivariate autoregressive model. It determines the propagation as a function of time and frequency. For nine healthy subjects the transmission of EEG activity was determined for target and non-target conditions corresponding to pressing of a switch in case of appearance of two identical images or withholding the reaction in case of different images. The involvement of prefrontal and frontal cortex manifested by the propagation from these structures was observed, especially in the early stages of the task. For the target condition there was a burst of propagation from C3 after pressing the switch, which can be interpreted as beta rebound upon completion of motor action. In case of non-target condition the propagation from F8 or Fz to C3 was observed, which can be connected with the active inhibition of motor cortex by right inferior frontal cortex or presupplementary motor area.read more
Citations
More filters
Journal ArticleDOI
A critical assessment of connectivity measures for EEG data: a simulation study.
TL;DR: A theoretical framework is developed to characterize artifacts of volume conduction, which may still be present even in reconstructed source time series as zero-lag correlations, and to distinguish their time-delayed brain interaction.
Journal ArticleDOI
Review of the methods of determination of directed connectivity from multichannel data.
TL;DR: The methods applied for estimation of functional connectivity from multichannel data are described with special emphasis on the estimators of directedness such as directed transfer function (DTF) and partial directed coherence based on multivariate autoregressive model.
Journal ArticleDOI
Brain neural synchronization and functional coupling in Alzheimer's disease as revealed by resting state EEG rhythms
Claudio Babiloni,Roberta Lizio,Nicola Marzano,Paolo Capotosto,Andrea Soricelli,Antonio Ivano Triggiani,Susanna Cordone,Loreto Gesualdo,Claudio Del Percio +8 more
TL;DR: It is suggested that resting state EEG rhythms reflect the abnormal cortical neural synchronization and coupling in the brain of prodromal and overt AD subjects, possibly reflecting dysfunctional neuroplasticity of the neural transmission in long range cortical networks.
Book ChapterDOI
Resting state cortical EEG rhythms in Alzheimer's disease: toward EEG markers for clinical applications: a review
Fabrizio Vecchio,Claudio Babiloni,Roberta Lizio,Fabrizio De Vico Fallani,Katarzyna J. Blinowska,Giulio Verrienti,Giovanni B. Frisoni,Paolo Maria Rossini +7 more
TL;DR: A review of the studies on EEG rhythms recorded in amnesic mild cognitive impairment (MCI) and Alzheimer's disease (AD) subjects is provided in this article. But, the most recent studies showed a moderate accuracy (70-80%) in the classification of EEG markers relative to normal and AD subjects, at least at group level.
Journal ArticleDOI
Cue-induced beta rebound during withholding of overt and covert foot movement
TL;DR: This is the first direct comparison of the beta rebound between motor execution and motor withholding, as well as withholding of overt and covert foot movement, which share a common origin and a common frequency band.
References
More filters
Journal ArticleDOI
A new look at the statistical model identification
TL;DR: In this article, a new estimate minimum information theoretical criterion estimate (MAICE) is introduced for the purpose of statistical identification, which is free from the ambiguities inherent in the application of conventional hypothesis testing procedure.
Book ChapterDOI
Investigating causal relations by econometric models and cross-spectral methods
TL;DR: In this article, it is shown that the cross spectrum between two variables can be decomposed into two parts, each relating to a single causal arm of a feedback situation, and measures of causal lag and causal strength can then be constructed.
Journal ArticleDOI
Storage and executive processes in the frontal lobes.
Edward E. Smith,John Jonides +1 more
TL;DR: The human frontal cortex helps mediate working memory, a system that is used for temporary storage and manipulation of information and that is involved in many higher cognitive functions.
Book
The Nervous System
TL;DR: The Nervous System as discussed by the authors is a series of intriguing essays ranging over terror, state fetishism, shamanic healing in Latin America, homesickness, and the place of the tactile eye in both magic and modernity.
OtherDOI
Circuitry of Primate Prefrontal Cortex and Regulation of Behavior by Representational Memory
TL;DR: The sections in this article are: Essence of Prefrontal Function: Regulation of Behavior by Representational Knowledge, Multiple Subsystems of Pre Frontal Cortex: Unity or Diversity of Function, and Functional Speculations.
Related Papers (5)
A new method of the description of the information flow in the brain structures
Partial directed coherence: a new concept in neural structure determination
Luiz A. Baccalá,Koichi Sameshima +1 more