Real time processing of affective and cognitive stimuli in the human brain extracted from MEG signals.

abstract：:Electrical dipoles oriented perpendicular to the cortical surface are the primary source of the scalp EEGs and MEGs. Thus, in particular, gyri and sulci structures on the cortical surface have a definite possibility to influence the EEGs and MEGs. This was examined by comparing the spatial power spectral density (PSD)...

journal_title：Brain topography

authors： Ramon C,Freeman WJ,Holmes M,Ishimaru A,Haueisen J,Schimpf PH,Rezvanian E

更新日期：2009-11-01 00:00:00

abstract：:The purpose of this study is to develop and quantitatively assess whether fusion of EEG and MEG (MEEG) data within the maximum entropy on the mean (MEM) framework increases the spatial accuracy of source localization, by yielding better recovery of the spatial extent and propagation pathway of the underlying generator...

journal_title：Brain topography

authors： Chowdhury RA,Zerouali Y,Hedrich T,Heers M,Kobayashi E,Lina JM,Grova C

更新日期：2015-11-01 00:00:00

abstract：:The rationale for the present study was to investigate several aspects of P300 topography in relation to aging and neuropsychological measures. We administered an auditory oddball ERP task to 72 participants aged 21.8 to 94.7 years, 36 males and 36 females, in addition to the Wechsler Abbreviated Scales of Intelligenc...

journal_title：Brain topography

authors： Fjell AM,Walhovd KB

更新日期：2001-10-01 00:00:00

abstract：:EEG reveals brain functions with high temporal resolution. Yet, multiple implicit variables may be involved in limited ERP measures. Special computation techniques are needed to recover these parameters. In the study of attention, we can obtain the ERP in attended (V) and unattended (U) conditions. Usually, the effect...

journal_title：Brain topography

authors： Yao D

更新日期：2003-10-01 00:00:00

abstract：:Sensor selection is typically used in magnetoencephalography (MEG) and scalp electroencephalography (EEG) studies, but this practice cannot differentiate between changes in the distribution of neural sources versus changes in the magnitude of neural sources. This problem is further complicated by (1) subject averaging...

journal_title：Brain topography

authors： Tian X,Huber DE

更新日期：2008-04-01 00:00:00

abstract：:The event-related responses of 18 individuals were recorded while they were listening to 3 music clips of 6 s duration which were repeated 30 times each. The music clips differed in the level of their complex structure, induced mood, musical tempo and prominent frequency. They were taken from Mozart's sonata (K. 448),...

journal_title：Brain topography

authors： Jausovec N,Habe K

更新日期：2003-01-01 00:00:00

abstract：:Humans are highly sensitive to statistical regularities in their environment. This phenomenon, usually referred as statistical learning, is most often assessed using post-learning behavioural measures that are limited by a lack of sensibility and do not monitor the temporal dynamics of learning. In the present study, ...

journal_title：Brain topography

authors： Farthouat J,Franco A,Mary A,Delpouve J,Wens V,Op de Beeck M,De Tiège X,Peigneux P

更新日期：2017-03-01 00:00:00

abstract：:A substantial body of research suggests that the cognitive mechanisms for picture and word processes are functionally and anatomically distinct. In spite of significant advancements in the understanding of pictures and words, the electrophysiological activities mediating these processes are not well known. To address ...

journal_title：Brain topography

authors： Azizian A,Watson TD,Parvaz MA,Squires NK

更新日期：2006-04-01 00:00:00

abstract：:Over the last decade, there has been growing interest in aberrant salience as a precursor of positive symptoms in schizophrenia. The present study investigates the neurophysiology of attentional capture by salient stimuli in the visual modality. Evoked oscillatory activity in the gamma frequency range (40 Hz) was asse...

journal_title：Brain topography

authors： Kornmayer L,Leicht G,Mulert C

更新日期：2015-01-01 00:00:00

abstract：:The simultaneous evaluation of the local electrocorticogram (ECoG) and the more broadly distributed electroencephalogram (EEG) from humans undergoing evaluation for epilepsy surgery has been shown to further the understanding of how pathologies give rise to spontaneous seizures. However, a well-known problem is that t...

journal_title：Brain topography

authors： Lanfer B,Röer C,Scherg M,Rampp S,Kellinghaus C,Wolters C

更新日期：2013-04-01 00:00:00

abstract：:In the past decade, the possibility of combining recordings of EEG and functional MRI (EEG-fMRI), has brought a new insight into the brain network underlying generalized spike wave discharges (GSWD). Nevertheless, how GSWD duration influences this network is not fully understood. In this study we aim to investigate wh...

journal_title：Brain topography

authors： Pugnaghi M,Carmichael DW,Vaudano AE,Chaudhary UJ,Benuzzi F,Di Bonaventura C,Giallonardo AT,Rodionov R,Walker MC,Duncan JS,Meletti S,Lemieux L

更新日期：2014-01-01 00:00:00

abstract：:Posterior cortical atrophy (PCA), considered a visual variant of Alzheimer's disease, has similar pathological characteristics yet shows a selective visual manifestation with relative preservation of other cortical areas, at least at early stages of disease. Using a gamut of imaging methods, we aim to evaluate the glo...

journal_title：Brain topography

authors： Glick-Shames H,Keadan T,Backner Y,Bick A,Levin N

更新日期：2020-09-01 00:00:00

abstract：:The combination of transcranial magnetic stimulation (TMS) with simultaneous electroencephalography (EEG) provides us the possibility to non-invasively probe the brain's excitability, time-resolved connectivity and instantaneous state. Early attempts to combine TMS and EEG suffered from the huge electromagnetic artifa...

journal_title：Brain topography

authors： Ilmoniemi RJ,Kicić D

更新日期：2010-01-01 00:00:00

abstract：:It would be of the utmost interest to map correlated sources in the working human brain by Event-Related Potentials (ERPs). This work is to develop a new method to map correlated neural sources based on the time courses of the scalp ERPs waveforms. The ERP data are classified first by k-means cluster analysis, and the...

journal_title：Brain topography

authors： Li L,Yao D

更新日期：2007-07-01 00:00:00

abstract：:Recent evidence suggests that transient increases in scalp electroencephalography (EEG) gamma band power (above 30 Hz) can be due to miniature eye movements. Although, these findings do not raise doubts about the widely established role of gamma range neural synchrony, it does call for caution when it comes to interpr...

journal_title：Brain topography

authors： Jerbi K,Freyermuth S,Dalal S,Kahane P,Bertrand O,Berthoz A,Lachaux JP

更新日期：2009-06-01 00:00:00

abstract：:Median nerve somatosensory evoked potentials were recorded from exposed cerebral cortex during craniotomies. This technique is valuable when knowledge of the motor cortex location can influence surgical decisions about resection limits or biopsy sites. Two different recording techniques were compared: strips of electr...

journal_title：Brain topography

authors： Nuwer MR,Banoczi WR,Cloughesy TF,Hoch DB,Peacock W,Levesque MF,Black KL,Martin NA,Becker DP

更新日期：1992-10-01 00:00:00

abstract：:Recently, exploring brain activity based on functional networks during naturalistic stimuli especially music and video represents an attractive challenge because of the low signal-to-noise ratio in collected brain data. Although most efforts focusing on exploring the listening brain have been made through functional m...

journal_title：Brain topography

authors： Zhu Y,Zhang C,Poikonen H,Toiviainen P,Huotilainen M,Mathiak K,Ristaniemi T,Cong F

更新日期：2020-05-01 00:00:00

abstract：:Automated structural magnetic resonance imaging (MRI) processing pipelines are gaining popularity for Alzheimer's disease (AD) research. They generate regional volumes, cortical thickness measures and other measures, which can be used as input for multivariate analysis. It is not clear which combination of measures an...

journal_title：Brain topography

authors： Westman E,Aguilar C,Muehlboeck JS,Simmons A

更新日期：2013-01-01 00:00:00

abstract：:The attentional blink (AB) is a transient attentional deficit that occurs when two stimuli that must both be detected are presented within an interval of less than 500 ms. Event-related potential (ERP) investigations have suggested that the AB affects a specific component, the P3, which is suppressed when targets are ...

journal_title：Brain topography

authors： Darque A,Del Zotto M,Khateb A,Pegna AJ

更新日期：2012-04-01 00:00:00

abstract：:Quantitative EEG (qEEG) has modified our understanding of epileptic seizures, shifting our view from the traditionally accepted hyper-synchrony paradigm toward more complex models based on re-organization of functional networks. However, qEEG measurements are so far rarely considered during the clinical decision-makin...

journal_title：Brain topography

authors： Zubler F,Gast H,Abela E,Rummel C,Hauf M,Wiest R,Pollo C,Schindler K

更新日期：2015-03-01 00:00:00

abstract：:The combination of frequency-tagging with electroencephalography (EEG) has recently proved fruitful for understanding the perception of beat and meter in musical rhythm, a common behavior shared by humans of all cultures. EEG frequency-tagging allows the objective measurement of input-output transforms to investigate ...

journal_title：Brain topography

authors： Nozaradan S,Keller PE,Rossion B,Mouraux A

更新日期：2018-03-01 00:00:00

abstract：:Motion artifacts are a well-known and frequent limitation during neuroimaging workup of cognitive decline. While head motion typically deteriorates image quality, we test the hypothesis that head motion differs systematically between healthy controls (HC), amnestic mild cognitive impairment (aMCI) and Alzheimer diseas...

journal_title：Brain topography

authors： Haller S,Monsch AU,Richiardi J,Barkhof F,Kressig RW,Radue EW

更新日期：2014-11-01 00:00:00

abstract：:In this mapping study of the entire scalp area, the responses to flash (FL) and pattern reversal (PR) stimuli were studied in 34 normal subjects. The N70, P100, N135 and P180 were similar from both stimuli but with some differences in amplitude and latency, especially the variability of the latency of P100 from FL. A ...

journal_title：Brain topography

authors： Hughes JR,Kuruvilla A,Fino JJ

更新日期：1992-04-01 00:00:00

abstract：:This paper describes a set of proposed standardized quantitative descriptors of event-related potentials, based upon principal component varimax analysis (PCVA). No claim is made that these mathematical descriptors correspond to discrete neurophysiological processes which generate the ERP. However, adoption and prospe...

journal_title：Brain topography

authors： John ER,Easton P,Prichep LS,Friedman J

更新日期：1993-01-01 00:00:00

abstract：:The objectives of this study were to examine the association of stride time variability (STV) with gray and white matter volumes in healthy older adults, and to determine the specific location of any parenchymal loss associated with higher STV. A total of 71 participants (mean age 69.0 ± 0.8 years; 59.7 % female) were...

journal_title：Brain topography

authors： Beauchet O,Annweiler C,Celle S,Bartha R,Barthélémy JC,Roche F

更新日期：2014-03-01 00:00:00

abstract：:The ability to effectively combine sensory inputs across modalities is vital for acquiring a unified percept of events. For example, watching a hammer hit a nail while simultaneously identifying the sound as originating from the event requires the ability to identify spatio-temporal congruencies and statistical regula...

journal_title：Brain topography

authors： Altieri N,Stevenson RA,Wallace MT,Wenger MJ

更新日期：2015-05-01 00:00:00

abstract：:Recent brain imaging studies suggest that semantic processing of words and images may share a common neural network, although modality-specific activation can also be observed. Other studies using event-related potentials (ERPs) report that brain responses to words and images may already differ at approximately 150 ms...

journal_title：Brain topography

authors： Khateb A,Pegna AJ,Michel CM,Landis T,Annoni JM

更新日期：2002-04-01 00:00:00

abstract：:Previous studies showed that distinct components of higher cognitive processes like memorizing of words could be correlated with changes in different frequency bands of the human EEG. This study was designed in order to find out if 1) some frequency bands show power and coherence changes only due to the modality of pr...

journal_title：Brain topography

authors： Weiss S,Rappelsberger P

更新日期：1998-10-01 00:00:00

abstract：:The EEG acquired simultaneously with fMRI is distorted by a number of artefacts related to the presence of strong magnetic fields, which must be reduced in order to allow for a useful interpretation and quantification of the EEG data. For the two most prominent artefacts, associated with magnetic field gradient switch...

journal_title：Brain topography

authors： Rothlübbers S,Relvas V,Leal A,Murta T,Lemieux L,Figueiredo P

更新日期：2015-03-01 00:00:00

abstract：:The combination of transcranial magnetic stimulation (TMS) and electroencephalography (EEG) is commonly applied for studying the effective connectivity of neuronal circuits. The stimulation excites neurons, and the resulting TMS-evoked potentials (TEPs) are recorded with EEG. A serious obstacle in this method is the g...

journal_title：Brain topography

authors： Salo KS,Mutanen TP,Vaalto SMI,Ilmoniemi RJ

更新日期：2020-01-01 00:00:00