Scalp EEG is not a blur: it can see high frequency oscillations although their generators are small.

abstract：:Spontaneous EEG signal can be parsed into sub-second periods of stable functional states (microstates) that assumingly correspond to brief large scale synchronization events. In schizophrenia, a specific class of microstate (class "D") has been found to be shorter than in healthy controls and to be correlated with pos...

journal_title：Brain topography

authors： Diaz Hernandez L,Rieger K,Baenninger A,Brandeis D,Koenig T

更新日期：2016-03-01 00:00:00

abstract：:The present study examined whether the excitability of the corticospinal pathway and the GABA-mediated inhibitory circuits of the primary motor cortex that project onto the corticospinal neurons in the tonically contracting hand muscle are changed by tonic contraction of the adjacent hand muscle. The motor evoked pote...

journal_title：Brain topography

authors： Jono Y,Iwata Y,Mizusawa H,Hiraoka K

更新日期：2016-11-01 00:00:00

abstract：:Frontal lobe epilepsy has recently been associated with disrupted brain functional connectivity; variations among various resting-state networks (RSNs) across time remains largely unclear. This study applied dynamic functional network connectivity (dFNC) analysis to investigate functional patterns in the temporal and ...

journal_title：Brain topography

authors： Klugah-Brown B,Luo C,He H,Jiang S,Armah GK,Wu Y,Li J,Yin W,Yao D

更新日期：2019-05-01 00:00:00

abstract：:The aim of the present study was to investigate how the context in which an action is presented could modulate the effect of action observation on language processing, an effect that is classically observed in the literature. To address this question, we recorded both behavioral (reaction times) and electrophysiologic...

journal_title：Brain topography

authors： Beauprez SA,Laroche B,Perret C,Bidet-Ildei C

更新日期：2019-09-01 00:00:00

abstract：:Multimodal human brain mapping has been proposed as an integrated approach capable of improving the recognition of the cortical correlates of specific neurological functions. We used simultaneous EEG-fMRI (functional magnetic resonance imaging) and EEG-TD-fNIRS (time domain functional near-infrared spectroscopy) recor...

journal_title：Brain topography

authors： Visani E,Canafoglia L,Gilioli I,Sebastiano DR,Contarino VE,Duran D,Panzica F,Cubeddu R,Contini D,Zucchelli L,Spinelli L,Caffini M,Molteni E,Bianchi AM,Cerutti S,Franceschetti S,Torricelli A

更新日期：2015-11-01 00:00:00

abstract：:In our previous model, we ascertained that the large amplitude waves (LAWs), reported by Barkley and coworkers (1990) in time series magnetoencephalography (MEG) recordings from migraine patients, could be simulated and compared with the recorded signals using a simple plane volume conductor model (Tepley and Wijesing...

journal_title：Brain topography

authors： Wijesinghe RS,Tepley N

更新日期：1997-04-01 00:00:00

abstract：:The use of tracers is an important technique available for studying cerebral function. Changes in 'signal' are large, but as a result of its photon limited nature, the measurement of this signal is limited: spatially, temporally and in terms of accuracy. The most commonly used single photon (SPECT) system (as apposed ...

journal_title：Brain topography

authors： Todd-Pokropek AE

更新日期：1992-01-01 00:00:00

abstract：:Many meditation exercises aim at increased awareness of ongoing experiences through sustained attention and at detachment, i.e., non-engaging observation of these ongoing experiences by the intent not to analyze, judge or expect anything. Long-term meditation practice is believed to generalize the ability of increased...

journal_title：Brain topography

authors： Tei S,Faber PL,Lehmann D,Tsujiuchi T,Kumano H,Pascual-Marqui RD,Gianotti LR,Kochi K

更新日期：2009-11-01 00:00:00

abstract：:Event-related potentials (ERPs) during a visual oddball paradigm with button-pressing responses were recorded in 12 right-handed subjects from 32 scalp electrodes. The single equivalent current dipole (ECD) of the target C1 (weak occipito-parietal negativity from 30-80 ms) was consistently located at the primary visua...

journal_title：Brain topography

authors： Yamazaki T,Kamijo K,Kenmochi A,Fukuzumi S,Kiyuna T,Takaki Y,Kuroiwa Y

更新日期：2000-04-01 00:00:00

abstract：:The subcortical connectivity underlying verbal perseveration (VP) remains poorly understood. We have previously reported that intraoperative electrical stimulation of the caudate nucleus during awake surgery resulted in VP. Here, our purpose is to study the white matter pathway underlying VP using subcortical stimulat...

journal_title：Brain topography

authors： Khan OH,Herbet G,Moritz-Gasser S,Duffau H

更新日期：2014-05-01 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：:Recently studied 'old' stimuli lead to larger frontal and parietal ERP responses than 'new' stimuli. The present experiment investigated the neuromagnetic correlates (MEG) of this 'old-new' effect and its modulation by emotional stimulus content. Highly arousing pleasant, highly arousing unpleasant and un-arousing neu...

journal_title：Brain topography

authors： Kissler J,Hauswald A

更新日期：2008-06-01 00:00:00

abstract：:Post-stroke aphasia (PSA), which refers to the loss or impairment of language, is typically caused by left hemisphere lesions. Previous neuroimaging studies have indicated that the pathology of PSA may be related to abnormalities in functional integration. In this study, we used resting-state functional magnetic reson...

journal_title：Brain topography

authors： Guo J,Yang M,Biswal BB,Yang P,Liao W,Chen H

更新日期：2019-03-01 00:00:00

abstract：:Recently, we have proposed a new concept for analyzing EEG/MEG data (Uhl et al. 1998), which leads to a dynamical systems based modeling (DSBM) of neurophysiological data. We report the application of this approach to four different classes of simulated noisy data sets, to investigate the impact of DSBM-filtering on s...

journal_title：Brain topography

authors： Uhl C,Hutt A,Kruggel F

更新日期：2001-04-01 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：:Neural activity within the human brain produces electrical potentials that are transmitted through the various tissues of the head to the scalp. A three-dimensional finite difference model has been applied to simulate this process and used as the basis for an inverse model, wherein known potentials on the scalp are us...

journal_title：Brain topography

authors： Teubner MD,Nixon JB,Rasser PE,Bottema MJ,Clark CR

更新日期：2005-07-01 00:00:00

abstract：:Over the last 20 years, a body of techniques known as high resolution EEG has allowed precise estimation of cortical activity from non-invasive EEG measurements. The availability of cortical waveforms from non-invasive EEG recordings allows to have not only the level of activation within a single region of interest (R...

journal_title：Brain topography

authors： De Vico Fallani F,Astolfi L,Cincotti F,Mattia D,Tocci A,Marciani MG,Colosimo A,Salinari S,Gao S,Cichocki A,Babiloni F

更新日期：2007-04-01 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：:Muscle or electromyogenic (EMG) artifact poses a serious risk to inferential validity for any electroencephalography (EEG) investigation in the frequency-domain owing to its high amplitude, broad spectrum, and sensitivity to psychological processes of interest. Even weak EMG is detectable across the scalp in frequenci...

journal_title：Brain topography

authors： Shackman AJ,McMenamin BW,Slagter HA,Maxwell JS,Greischar LL,Davidson RJ

更新日期：2009-06-01 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：:Topographical analysis of cerebral electrical activity was performed in 44 patients with hepatic encephalopathy. These patients were classified in 5 groups according to clinical criteria. Eight healthy subjects were used as a control group. All were studied in an awake, eyes closed, condition and some [Control Group (...

journal_title：Brain topography

authors： Sagalés T,Gimeno V,de la Calzada MD,Casellas F,Dolors Macià M,Villar Soriano M

更新日期：1990-04-01 00:00:00

abstract：:Although impairments related to somatosensory perception are common in schizophrenia, they have rarely been examined in functional imaging studies. In the present study, magnetoencephalography (MEG) was used to identify neural networks that support attention to somatosensory stimuli in healthy adults and abnormalities...

journal_title：Brain topography

authors： Huang MX,Lee RR,Gaa KM,Song T,Harrington DL,Loh C,Theilmann RJ,Edgar JC,Miller GA,Canive JM,Granholm E

更新日期：2010-03-01 00:00:00

abstract：:This study examined the effect of modality of stimulation on two measures of cerebral function: (a) the scalp distribution of sensory evoked potentials and (b) the cerebral distribution of radiolabelled HMPAO. Steady-state stimulation in the auditory, somatosensory or visual modality was presented to six subjects. Sca...

journal_title：Brain topography

authors： Weinberg H,Johnson B,Cohen P,Crisp D,Robertson A

更新日期：1989-10-01 00:00:00

abstract：:Contralateral somatosensory evoked fields (SEF) by whole head MEG after unilateral median and ulnar nerve stimulation of both hands were studied in 10 healthy right-handed subjects. Major parameters describing cortical activity were examined to discriminate median and ulnar nerve evoked responses. Somatic sensitivity ...

journal_title：Brain topography

authors： Theuvenet PJ,van Dijk BW,Peters MJ,van Ree JM,Lopes da Silva FL,Chen AC

更新日期：2006-01-01 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：:In Autism Spectrum Disorders (ASD), impaired response inhibition and lack of adaptation are hypothesized to underlie core ASD symptoms, such as social communication and repetitive, stereotyped behavior. Thus, the aim of the present study was to compare neural correlates of inhibition, post-error adaptation, and reacti...

journal_title：Brain topography

authors： Moliadze V,Brodski-Guerniero A,Schuetz M,Siemann J,Lyzhko E,Schlitt S,Kitzerow J,Langer A,Kaiser J,Naumer MJ,Wibral M,Chan J,Freitag CM,Siniatchkin M

更新日期：2020-05-01 00:00:00

abstract：:Electroconvulsive therapy (ECT) has significant short-term antidepressant effects on drug-resistant patients with severe major depression. Animal studies have demonstrated that electroconvulsive seizures produce potentiation-like synaptic remodeling in both sub-cortical and frontal cortical circuits. However, the elec...

journal_title：Brain topography

authors： Casarotto S,Canali P,Rosanova M,Pigorini A,Fecchio M,Mariotti M,Lucca A,Colombo C,Benedetti F,Massimini M

更新日期：2013-04-01 00:00:00

abstract：:Despite genetic, morphological and experimental in vivo, data implying fixed abnormalities in patients with absence seizures, attempts to find highly consistent features in the 3-Hz spike-and-wave pattern recorded during sequential seizures from the same subject have been largely unsuccessful. We used a new data decom...

journal_title：Brain topography

authors： McKeown MJ,Humphries C,Iragui V,Sejnowski TJ

更新日期：1999-01-01 00:00:00

abstract：:Evoked potentials are difficult to analyze because multiple sources are active simultaneously. Principal component analysis and dipole localization are two techniques that have been used to disentangle overlapping sources. Both of these techniques have problems. Principal component analysis suffers from a rotation amb...

journal_title：Brain topography

authors： Klein SA,Carney T

更新日期：1995-01-01 00:00:00

abstract：:Perceptual closure ability is postulated to depend upon rapid transmission of magnocellular information to prefrontal cortex via the dorsal stream. In contrast, illusory contour processing requires only local interactions within primary and ventral stream visual regions, such as lateral occipital complex. Schizophreni...

journal_title：Brain topography

authors： Amiaz R,Vainiger D,Gershon AA,Weiser M,Lavidor M,Javitt DC

更新日期：2016-07-01 00:00:00