Regional magnetic resonance imaging measures for multivariate analysis in Alzheimer's disease and mild cognitive impairment.

abstract：:Most EEG studies analysing speech production with event related brain potential (ERP) have adopted silent metalinguistic tasks or delayed or tacit picture naming in order to avoid possible artefacts during motor preparation. A central issue in the interpretation of these results is whether the processes involved in th...

journal_title：Brain topography

authors： Laganaro M,Perret C

更新日期：2011-03-01 00:00:00

abstract：:Fibromyalgia (FM) is a chronic syndrome involving widespread pain of unclear pathophysiology. FM patients frequently complain about cognitive symptoms that interfere with their daily life activities. Several studies have reported attentional deficits and working memory impairment in FM patients. Nevertheless, the mech...

journal_title：Brain topography

authors： González-Villar AJ,Pidal-Miranda M,Arias M,Rodríguez-Salgado D,Carrillo-de-la-Peña MT

更新日期：2017-07-01 00:00:00

abstract：:Cognitive performance in attention-deficit/hyperactivity disorder (ADHD) is characterised, in part, by frequent fluctuations in response speed, resulting in high reaction time variability (RTV). RTV captures a large proportion of the genetic risk in ADHD but, importantly, is malleable, improving significantly in a fas...

journal_title：Brain topography

authors： Cheung CHM,McLoughlin G,Brandeis D,Banaschewski T,Asherson P,Kuntsi J

更新日期：2017-05-01 00:00:00

abstract：:Magnetoencephalography provides precise information about the temporal dynamics of brain activation and is an ideal tool for investigating rapid cognitive processing. However, in many cognitive paradigms visual stimuli are used, which evoke strong brain responses (typically 40-100 nAm in V1) that may impede the detect...

journal_title：Brain topography

authors： Mills T,Lalancette M,Moses SN,Taylor MJ,Quraan MA

更新日期：2012-07-01 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：: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：:When evoked responses are used in clinical practice and research the measures that are most commonly considered are the latencies and amplitudes of EP components as measured at a single electrode site. Our recent studies have shown that multichannel recordings yield measures such as potential field asymmetry that may ...

journal_title：Brain topography

authors： Sidman RD,Ford MR,Ramsey G

更新日期：1994-04-01 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：:We studied the magnetic field maps generated by six dipoles in the temporal region of a plastic skull filled with conducting gel. The data were processed with two mathematical models. One, using Biot-Savart's law, considered only the magnetic field generated by a localized current dipole, and the other considered a di...

journal_title：Brain topography

authors： Rose DF,Ducla-Soares E,Sato S

更新日期：1989-04-01 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：:The accuracy and precision of topographic maps depicting scalp potentials and scalp potentials squared have been examined. Electrode placement was that specified by the International 10-20 System and the methods of interpolation bilinear and bicubic spines. The results indicate that, for these interpolation methods, t...

journal_title：Brain topography

authors： Koles ZJ,Paranjape RB

更新日期：1988-01-01 00:00:00

abstract：:The functional organization of cortical speech processing is thought to be hierarchical, increasing in complexity and proceeding from primary sensory areas centrifugally. The current study used the mismatch negativity (MMN) obtained with electrophysiology (EEG) to investigate the early latency period of visual speech ...

journal_title：Brain topography

authors： Ponton CW,Bernstein LE,Auer ET Jr

更新日期：2009-05-01 00:00:00

abstract：:With its millisecond temporal resolution, Magnetoencephalography (MEG) is well suited for real-time monitoring of brain activity. Real-time feedback allows the adaption of the experiment to the subject's reaction and increases time efficiency by shortening acquisition and off-line analysis. Two formidable challenges e...

journal_title：Brain topography

authors： Dinh C,Strohmeier D,Luessi M,Güllmar D,Baumgarten D,Haueisen J,Hämäläinen MS

更新日期：2015-11-01 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：: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：:Action generation relies on a widely distributed network of brain areas. However, little is known about the spatiotemporal dynamics of neuronal activity in the network that gives rise to voluntary action in humans. Here, we used magnetoencephalography (MEG) and source analysis (n = 15, 7 female subjects) to investigat...

journal_title：Brain topography

authors： Carl C,Hipp JF,König P,Engel AK

更新日期：2016-01-01 00:00:00

abstract：:A new residual function in the inverse problem of equivalent dipole localization methods is proposed which is based on the spatial correlation of the background EEG. This residual has the advantage that it allows the calculation of confidence limits for dipole model parameters. The method was applied to VEP data, and ...

journal_title：Brain topography

authors： Yamazaki T,van Dijk BW,Spekreijse H

更新日期：1992-01-01 00:00:00

abstract：:The term "magnetic source image" (MSI) describes the distribution of neuronal activity in the brain that can be deduced from measurements of the field pattern it produces across the scalp. The signals which provide the basis for an MSI are obtained from the magnetoencephalogram (MEG) which is conventionally recorded w...

journal_title：Brain topography

authors： Williamson SJ,Lü ZL,Karron D,Kaufman L

更新日期：1991-01-01 00:00:00

abstract：:EEG background activity of patients with obstructive sleep apnea syndrome (OSAS, N = 25) was compared to that of normal controls (N = 14) to reflect alterations of brain electrical activity caused by chronic intermittent hypoxia in OSAS. Global and regional (left vs. right, anterior vs. posterior) measures of spatial ...

journal_title：Brain topography

authors： Toth M,Faludi B,Wackermann J,Czopf J,Kondakor I

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：:Event-Related Desynchronization (ERD) and Synchronization (ERS) were studied in 20 normal subjects during a Sternberg-type auditory memory-scanning paradigm. Half of the subjects performed the experiment with vowels and the other half with tones as stimuli. The stimuli consisted of 100 msec long synthesized vowels and...

journal_title：Brain topography

authors： Krause CM,Lang H,Laine M,Kuusisto M,Pörn B

更新日期：1995-10-01 00:00:00

abstract：:Functional near-infrared spectroscopy (fNIRS) has been proven reliable for investigation of low-level visual processing in both infants and adults. Similar investigation of fundamental auditory processes with fNIRS, however, remains only partially complete. Here we employed a systematic three-level validation approach...

journal_title：Brain topography

authors： Chen LC,Sandmann P,Thorne JD,Herrmann CS,Debener S

更新日期：2015-09-01 00:00:00

abstract：:Most of the studies in long-range apparent movement have been concerned with the psychophysical properties in central vision. However, apparent movement in peripheral vision is not clearly understood. This study focuses on the properties of the perception of apparent movement between central and peripheral vision. The...

journal_title：Brain topography

authors： Tsuda R,Ueno S

更新日期：1996-04-01 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：:Aging and sensorineural hearing loss are known to be involved in the development of chronic tinnitus. This study explores the structural changes of gray matter using surface base methods and focuses more specifically on changes in cortical thickness in 127 tinnitus patients. The linear relationships between cortical t...

journal_title：Brain topography

authors： Yoo HB,De Ridder D,Vanneste S

更新日期：2016-11-01 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：:Event related potentials (ERPs) to an auditory odd-ball paradigm were recorded with the linked earlobe reference (LER) and with a computer calculated average reference (AR), excluding the two linked earlobe derivations. The study was performed in 30 patients with lesions of frontal, parietal, occipital cortex, unilate...

journal_title：Brain topography

authors： Onofrj M,Fulgente T,Malatesta G,Locatelli T

更新日期：1994-07-01 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：:This study aimed to finding modality-independent event-related potentials (ERP) modulations related to spatial attention by minimising several possible methodological constrains which may account for the rareness of this finding in past spatial attention ERP research. ERP were recorded while subjects performed a shift...

journal_title：Brain topography

authors： Martin-Loeches M,Barceló F,Rubia FJ

更新日期：1997-10-01 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