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https://www.readbyqxmd.com/read/28449570/low-dose-clozapine-induced-seizure-a-case-report
#1
Abdullah Bolu, Süleyman Akarsu, Erdal Pan, Emre Aydemir, Taner Oznur
Seizures are believed to be a dose-dependent side effect of clozapine. In this case report, we describe a patient who had tonic-clonic seizures after using a low dose clozapine who did not have any seizure risk. The 29-year-old male patient had been followed-up with a diagnosis of schizophrenia for about 5 years. When using clozapine 200 mg/day he had a tonic-clonic seizure with bilateral diffuse epileptic activity in electroencephalography (EEG). In the literature, there are a few case reports about low-dose clozapine-induced seizure...
May 31, 2017: Clinical Psychopharmacology and Neuroscience: the Official Scientific Journal of the Korean College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28449561/differences-in-resting-state-quantitative-electroencephalography-patterns-in-attention-deficit-hyperactivity-disorder-with-or-without-comorbid-symptoms
#2
Jun Won Kim, Soo Yeon Kim, Jae-Won Choi, Kyoung Min Kim, Sojeong Hannah Nam, Kyung Joon Min, Young Sik Lee, Tae Young Choi
Objective: The aim of the present study was to evaluate the role of comorbid psychiatric symptoms on quantitative electroencephalogram (QEEG) activities in boys with the attention deficit/hyperactivity disorder (ADHD). Methods: All participants were male students in the second, third or fourth grade in elementary school. Therefore, there were no significant differences in age or sex. Participants with ADHD were assigned to one of three groups: pure ADHD (n=22), ADHD with depressive symptoms (n=11), or ADHD with problematic internet use (n=19)...
May 31, 2017: Clinical Psychopharmacology and Neuroscience: the Official Scientific Journal of the Korean College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28449392/osmotic-stress-decreases-complexity-underlying-the-electrophysiological-dynamic-in-soybean
#3
G F R Saraiva, A S Ferreira, G M Souza
Research rationale: Studies on plant electrophysiology are mostly focused on specific traits of single cells. Inspired by the complexity of the signaling network in plants and by analogies with neurons in human brains, we have sought for evidences of high complexity in the electrical dynamics of plant signaling and a likely relation with environmental cues. Central methods: An EEG-like standard protocol was adopted for high-resolution measurements of the electrical signal in Glycine max seedlings. The signals were continuously recorded in the same plants before and after the osmotic stimuli with a -2 MPa mannitol solution...
April 27, 2017: Plant Biology
https://www.readbyqxmd.com/read/28449372/the-impact-of-mood-on-empathy-for-pain-evidence-from-an-eeg-study
#4
Xiang Li, Xianxin Meng, Hong Li, Jiemin Yang, Jiajin Yuan
The current work investigated whether the neural correlates of empathy for pain are altered by mood valence of observers. Following mood induction, participants watched pictures representing painful or nonpainful situations. We used EEG to record neural activity and assessed event-related desynchronization at central sites during pain observation. Greater mu desynchronization was observed during painful relative to nonpainful situations in positive and neutral mood but not in negative mood. We also found that the pain empathy effect, indexed by mu suppression differences between painful and nonpainful conditions, was smaller in negative than in neutral and positive mood, while this effect was similar between neutral and positive mood...
April 27, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28448680/22q11-2-deletion-syndrome-lowers-seizure-threshold-in-adult-patients-without-epilepsy
#5
Robert G Wither, Felippe Borlot, Alex MacDonald, Nancy J Butcher, Eva W C Chow, Anne S Bassett, Danielle M Andrade
OBJECTIVE: Previous studies examining seizures in patients with 22q11.2 deletion syndrome (22q11.2DS) have focused primarily on children and adolescents. In this study we investigated the prevalence and characteristics of seizures and epilepsy in an adult 22q11.2DS population. METHODS: The medical records of 202 adult patients with 22q11.2DS were retrospectively reviewed for documentation of seizures, electroencephalography (EEG) reports, and magnetic resonance imaging (MRI) findings...
April 27, 2017: Epilepsia
https://www.readbyqxmd.com/read/28448272/automated-network-analysis-to-measure-brain-effective-connectivity-estimated-from-eeg-data-of-patients-with-alcoholism
#6
Youngoh Bae, Byeong Wook Yoo, Jung Chan Lee, Hee Chan Kim
OBJECTIVE: Detection and diagnosis based on extracting features and classification using electroencephalography (EEG) signals are being studied vigorously. A network analysis of time series EEG signal data is one of many techniques that could help study brain functions. In this study, we analyze EEG to diagnose alcoholism. APPROACH: We propose a novel methodology to estimate the differences in the status of the brain based on EEG data of normal subjects and data from alcoholics by computing many parameters stemming from effective network using Granger causality...
April 27, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28447847/the-speed-of-voluntary-and-priority-driven-shifts-of-visual-attention
#7
Michael Jenkins, Anna Grubert, Martin Eimer
The question how fast spatial attention moves between different visual objects remains debated. We used electrophysiological measures to determine the speed of voluntary and visually guided shifts of attention. Participants shifted attention from a known benchmark object (T1) to a benchmark-defined target object (T2) in tasks where these shifts had to be controlled endogenously and tasks where they could be guided by visible stimulus attributes (target features or arrow cues). To track the speed of these attention shifts, we measured event-related potential (ERP) markers of attentional object selection (N2pc components)...
April 27, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28447844/frontal-theta-band-oscillations-predict-error-correction-and-posterror-slowing-in-typing
#8
Çığır Kalfaoğlu, Tom Stafford, Elizabeth Milne
Performance errors are associated with robust behavioral and electroencephalography (EEG) effects. However, there is a debate about the nature of the relationship between these effects and implicit versus explicit error awareness. Our aim was to study the relationship between error related electrophysiological effects, such as spectral perturbations in fronto-medial theta band oscillations (FMT), and error awareness in typing. Typing has an advantage as an experimental paradigm in that detected errors are quickly and habitually signaled by the participant using backspace, allowing separation of detected from undetected errors without interruption in behavior...
April 27, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28447214/eeg-abnormalities-and-long-term-seizure-outcome-in-high-functioning-autism
#9
Özdem Ertürk Çetin, Barış Korkmaz, Gülce Alev, Veysi Demirbilek
Electroencephalographic abnormalities may occur in autistic spectrum disorders (ASD) even in the absence of clinical seizures. These abnormalities may vary from nonspecific changes to epileptiform abnormalities and are more common compared to the overall population. The level of intelligence is a significant risk factor for epilepsy in ASD. However, the relation between the functionality of the individuals with autism and the electroencephalographic (EEG) abnormalities, and the clinical significance of these abnormalities still remain relatively unclear...
April 26, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/28446870/a-randomized-controlled-erp-study-on-the-effects-of-multi-domain-cognitive-training-and-task-difficulty-on-task-switching-performance-in-older-adults
#10
Kristina Küper, Patrick D Gajewski, Claudia Frieg, Michael Falkenstein
Executive functions are subject to a marked age-related decline, but have been shown to benefit from cognitive training interventions. As of yet, it is, however, still relatively unclear which neural mechanism can mediate training-related performance gains. In the present electrophysiological study, we examined the effects of multi-domain cognitive training on performance in an untrained cue-based task switch paradigm featuring Stroop color words: participants either had to indicate the word meaning of Stroop stimuli (word task) or perform the more difficult task of color naming (color task)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28446864/neural-entrainment-to-polyrhythms-a-comparison-of-musicians-and-non-musicians
#11
Jan Stupacher, Guilherme Wood, Matthias Witte
Music can be thought of as a dynamic path over time. In most cases, the rhythmic structure of this path, such as specific sequences of strong and weak beats or recurring patterns, allows us to predict what and particularly when sounds are going to happen. Without this ability we would not be able to entrain body movements to music, like we do when we dance. By combining EEG and behavioral measures, the current study provides evidence illustrating the importance of ongoing neural oscillations at beat-related frequencies-i...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28446580/entrainment-of-visual-steady-state-responses-is-modulated-by-global-spatial-statistics
#12
Thomas Nguyen, Karl Kuntzelman, Vladimir Miskovic
The rhythmic delivery of visual stimuli evokes large-scale neuronal entrainment in the form of steady-state oscillatory field responses. The spatio-temporal properties of stimulus drive appear to constrain the relative degrees of neuronal entrainment. Specific frequency ranges, for example, are uniquely suited for enhancing the strength of stimulus-driven brain oscillations. When it comes to the nature of the visual stimulus itself, studies have used a plethora of inputs ranging from spatially unstructured empty fields to simple contrast patterns (checkerboards, gratings, stripes) and complex arrays (human faces, houses, natural scenes)...
April 26, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28446578/brain-negativity-as-an-indicator-of-predictive-error-processing-the-contribution-of-visual-action-effect-monitoring
#13
Michael Joch, Mathias Hegele, Heiko Maurer, Hermann Müller, Lisa Katharina Maurer
The error-(related)-negativity (Ne/ERN) is an event-related potential in the electroencephalogram (EEG) correlating with error processing. Its conditions of appearance prior to terminal external error information suggest that the Ne/ERN is indicative of predictive processes in the evaluation of errors. The aim of the present study was to specifically examine the Ne/ERN in a complex motor task and to particularly rule out other explaining sources of the Ne/ERN aside from error prediction processes. To this end, we focused on the dependency of the Ne/ERN on visual monitoring about the action outcome after movement termination but prior to result feedback (action effect monitoring)...
April 26, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28446222/effect-of-quantity-and-intensity-of-pulsed-light-on%C3%A2-human-non-visual-physiological-responses
#14
Qianying Dai, Yuria Uchiyama, Soomin Lee, Yoshihiro Shimomura, Tetsuo Katsuura
BACKGROUND: Exposure to pulsed light results in non-visual physiological responses in humans. The present study aims to investigate whether such non-visual effects are influenced to a greater extent by the intensity of lighting or by the power (quantity) of lighting. METHODS: >Twelve healthy young male participants (23 ± 0.3 years, 21-24 age range) were recruited for the present study. Participants were exposed to light of varying levels of intensity and quantity whose frequency was held constant across the conditions, which consisted of exposure to blue (different intensity, constant quantity) and white (constant intensity, different quantity) LEDs...
April 26, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28445839/temporal-lobe-spikes-eeg-fmri-contributions-to-the-mesial-vs-lateral-debate
#15
Satsuki Watanabe, François Dubeau, Natalja Zazubovits, Jean Gotman
OBJECTIVE: It has been reported that interictal epileptic discharges (IEDs) recorded in temporal regions on scalp EEG are unlikely to originate from mesial temporal structures. However, EEG-fMRI sometimes show mesial temporal activation. We hypothesized that BOLD activation in the temporal neocortex is weaker than in the mesial structures, reflecting the fact that propagated activity has less metabolic demand than the original discharge. METHODS: Twelve patients with epilepsy who have BOLD response in mesial temporal structures were selected from our EEG-fMRI database...
April 9, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28445740/right-brain-left-brain-in-depressive-disorders-clinical-and-theoretical-implications-of-behavioral-electrophysiological-and-neuroimaging-findings
#16
REVIEW
Gerard E Bruder, Jonathan W Stewart, Patrick J McGrath
The right and left side of the brain are asymmetric in anatomy and function. We review electrophysiological (EEG and event-related potential), behavioral (dichotic and visual perceptual asymmetry), and neuroimaging (PET, MRI, NIRS) evidence of right-left asymmetry in depressive disorders. Recent electrophysiological and fMRI studies of emotional processing have provided new evidence of altered laterality in depressive disorders. EEG alpha asymmetry and neuroimaging findings at rest and during cognitive or emotional tasks are consistent with reduced left prefrontal activity in depressed patients, which may impair downregulation of amygdala response to negative emotional information...
April 23, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28445601/status-epilepticus-in-dogs-and-cats-part-2-treatment-monitoring-and-prognosis
#17
Susan Blades Golubovic, John H Rossmeisl
OBJECTIVE: To discuss current anticonvulsant drug options and advances in treatment of status epilepticus (SE) and to review the prognosis associated with SE. TREATMENT: When treating a patient with SE, the main goals are to halt seizure activity, prevent further seizures, identify the cause of the seizures, and manage any complications. The veterinary literature indicates that benzodiazepines are the most common class of drugs used for the initial treatment of SE...
April 26, 2017: Journal of Veterinary Emergency and Critical Care
https://www.readbyqxmd.com/read/28445551/pattern-classification-of-eeg-signals-reveals-perceptual-and-attentional-states
#18
Alexandra List, Monica D Rosenberg, Aleksandra Sherman, Michael Esterman
Pattern classification techniques have been widely used to differentiate neural activity associated with different perceptual, attentional, or other cognitive states, often using fMRI, but more recently with EEG as well. Although these methods have identified EEG patterns (i.e., scalp topographies of EEG signals occurring at certain latencies) that decode perceptual and attentional states on a trial-by-trial basis, they have yet to be applied to the spatial scope of attention toward global or local features of the display...
2017: PloS One
https://www.readbyqxmd.com/read/28445178/familial-hemiplegic-migraine-with-asymmetric-encephalopathy-secondary-to-atp1a2-mutation-a-case-series
#19
Olwen C Murphy, Aine Merwick, Olivia OʼMahony, Aisling M Ryan, Brian McNamara
INTRODUCTION: Familial hemiplegic migraine (FHM) is a genetic disease with a variable clinical phenotype. The imaging and electroencephalogram (EEG) correlates of FHM are not well described. CASE SERIES: We describe a case series of five young women aged 12 to 32 years. Each case presented with headache, encephalopathy, and hemiparesis of varying severity. One patient developed seizures. All patients improved spontaneously. INVESTIGATIONS: Asymmetric slow-wave activity was seen on electroencephalogram in each case...
April 25, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28444975/dissociation-between-the-neural-correlates-of-conscious-face-perception-and-visual-attention
#20
Joaquin Navajas, Aleksander W Nitka, Rodrigo Quian Quiroga
Given the higher chance to recognize attended compared to unattended stimuli, the specific neural correlates of these two processes, attention and awareness, tend to be intermingled in experimental designs. In this study, we dissociated the neural correlates of conscious face perception from the effects of visual attention. To do this, we presented faces at the threshold of awareness and manipulated attention through the use of exogenous prestimulus cues. We show that the N170 component, a scalp EEG marker of face perception, was modulated independently by attention and by awareness...
April 26, 2017: Psychophysiology
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