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Ersp itc erp

Sweeti, Deepak Joshi, B K Panigrahi, Sneh Anand, Jayasree Santhosh
Selective visual attention is the ability to selectively pay attention to the targets while inhibiting the distractors. This paper aims to study the targets and non-targets interplay in spatial attention task while subject attends to the target object present in one visual hemifield and ignores the distractor present in another visual hemifield. This paper performs the averaged evoked response potential (ERP) analysis and time-frequency analysis. ERP analysis agrees to the left hemisphere superiority over late potentials for the targets present in right visual hemifield...
February 2018: Journal of Medical Engineering & Technology
Cheryl M Corcoran, Anastasia Stoops, Migyung Lee, Antigona Martinez, Pejman Sehatpour, Elisa C Dias, Daniel C Javitt
Sensory processing deficits are core features of schizophrenia, reflected in impaired generation of event-related potential (ERP) measures such as auditory mismatch negativity (MMN) and visual P1. To understand the potential time course of development of deficits in schizophrenia, we obtained MMN to unattended duration, intensity and frequency deviants, and visual P1 to attended LSF stimuli, in 43 healthy individuals ages 6 to 25years (mean 17), and compared results to data from 30 adult schizophrenia patients (mean age 38)...
January 2018: Schizophrenia Research
Nancy B Lundin, Lisa A Bartolomeo, Brian F O'Donnell, William P Hetrick
BACKGROUND: Bipolar disorder (BD) is associated with reductions in the P3b event-related potential (ERP) response to target auditory stimuli, which suggests deficits in context updating. Previous studies have typically examined these responses in the temporal domain, which may not capture alterations in specific frequencies of phase-locked or induced electrophysiological activity. Therefore, the present study examined early and late ERPs in temporal and frequency domains in a bipolar sample with and without current psychotic features...
February 2018: Bipolar Disorders
Christopher Leroy, Jean-Louis Bourriez, Kathy Dujardin, Behnam Molaee-Ardekani, Claudio Babiloni, Dominique Deplanque, Amélie Ponchel, Sophie Hennion, Lucie Plomhause, Hervé Devanne, Julie Deguil, Pierre Payoux, Olivier Blin, Déborah Méligne, Joëlle Micallef, Nicolas Chauveau, Laura Lanteaume, Céline Vervueren, François Guimont, Claire Thalamas, Catherine Cassé-Perrot, Franck Rouby, Régis Bordet, Philippe Derambure
OBJECTIVE: To identify possible electroencephalographic (EEG) markers of donepezil's effect on cortical activity in young, healthy adult volunteers at the group level. METHODS: Thirty subjects were administered a daily dose of either 5mg donepezil or placebo for 15days in a double-blind, randomized, cross-over trial. The electroencephalogram during an auditory oddball paradigm was recorded from 58 scalp electrodes. Current source density (CSD) transformations were applied to EEG epochs...
November 27, 2015: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
David Zarka, Carlos Cevallos, Mathieu Petieau, Thomas Hoellinger, Bernard Dan, Guy Cheron
Biological motion observation has been recognized to produce dynamic change in sensorimotor activation according to the observed kinematics. Physical plausibility of the spatial-kinematic relationship of human movement may play a major role in the top-down processing of human motion recognition. Here, we investigated the time course of scalp activation during observation of human gait in order to extract and use it on future integrated brain-computer interface using virtual reality (VR). We analyzed event related potentials (ERP), the event related spectral perturbation (ERSP) and the inter-trial coherence (ITC) from high-density EEG recording during video display onset (-200-600 ms) and the steady state visual evoked potentials (SSVEP) inside the video of human walking 3D-animation in three conditions: Normal; Upside-down (inverted images); and Uncoordinated (pseudo-randomly mixed images)...
2014: Frontiers in Systems Neuroscience
Hanni Kiiski, Richard B Reilly, Róisín Lonergan, Siobhán Kelly, Marie Claire O'Brien, Katie Kinsella, Jessica Bramham, Teresa Burke, Seán O Donnchadha, Hugh Nolan, Michael Hutchinson, Niall Tubridy, Robert Whelan
Cognitive impairment (CI), often examined with neuropsychological tests such as the Paced Auditory Serial Addition Test (PASAT), affects approximately 65% of multiple sclerosis (MS) patients. The P3b event-related potential (ERP), evoked when an infrequent target stimulus is presented, indexes cognitive function and is typically compared across subjects' scalp electroencephalography (EEG) data. However, the clustering of independent components (ICs) is superior to scalp-based EEG methods because it can accommodate the spatiotemporal overlap inherent in scalp EEG data...
2012: PloS One
Deokwon Ko, Soyoung Kwon, Gwan-Taek Lee, Chang Hwan Im, Kyung Hwan Kim, Ki-Young Jung
BACKGROUND AND PURPOSE: The aim of this study was to identify the mechanism underlying the auditory discriminatory process reflected in mismatch negativity (MMN), using time-frequency analysis of single-trial event-related potentials (ERPs). METHODS: Two auditory tones of different probabilities (oddball paradigm) and the same probability (control paradigm) were used. The average dynamic changes in amplitude were evaluated, and the in-phase consistency of the EEG spectrum at each frequency and time window across trials, event-related spectral perturbations (ERSPs), and inter-trial phase coherence (ITC) were computed...
March 2012: Journal of Clinical Neurology
Yong-Wook Shin, Giri Krishnan, William P Hetrick, Colleen A Brenner, Anantha Shekhar, Frederick W Malloy, Brian F O'Donnell
Previous studies suggest that deficits in neural synchronization and temporal integration are characteristic of schizophrenia. These phenomena have been rarely studied in SPD, which shares phenomenological and genetic similarities with schizophrenia. Event-related potentials (ERPs) were obtained using an auditory oddball task from 21 patients with schizophrenia, 19 subjects with SPD and 19 healthy control subjects. Inter-trial coherence (ITC) and event-related spectral perturbation (ERSP) were measured across trials to target tones using time-frequency analysis...
December 2010: Schizophrenia Research
Marcia R Digiacomo, Josep Marco-Pallarés, Angélica B Flores, Carlos M Gómez
In a spatial central cueing paradigm, positions in the horizontal meridian were cued to evaluate the neurocognitive processing of validly (V) and invalidly cued (I) targets. ERPs were obtained from 20 EEG channel recordings. Complex Morlet wavelets were applied for computing event-related spectral power (ERSP) modulations and inter-trial phase coherence (ITC). P3a and P3b responses were increased in a statistically significant manner in I targets with regard to V targets. This increase seems to be generated only by phase resetting without enhancement of spectral power...
October 9, 2008: Brain Research
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