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Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)

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https://www.readbyqxmd.com/read/28679286/local-differences-in-computational-sleep-depth-parameters-in-healthy-school-aged-children
#1
Sari-Leena Himanen, Eero Huupponen, Marjukka Jussila, Anna-Maria Lapinlampi, Outi Saarenpää-Heikkilä
OBJECTIVE: Slow wave sleep in children reflects several processes, such as sleep pressure, synaptic density, and cortical maturation. Deep sleep in children is abundant and our aim was to discover whether examining electroencephalography (EEG) mean frequency would help separate these processes. METHODS: Sleep EEG of 28 generally healthy 7- to 11-year-old children (14 first graders, 14 third graders, 14 girls, 14 boys) was analyzed. Median non-rapid eye movement (NREM) sleep EEG frequency (median sleep depth, in Hz) and the amount of computational deep sleep using the thresholds of 2 Hz and 4 Hz (DS2% and DS4%, respectively) were calculated from the frontopolar, central, and occipital EEG derivations...
July 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28677413/high-intensity-chronic-stroke-motor-imagery-neurofeedback-training-at-home-three-case-reports
#2
Catharina Zich, Stefan Debener, Clara Schweinitz, Annette Sterr, Joost Meekes, Cornelia Kranczioch
Motor imagery (MI) with neurofeedback has been suggested as promising for motor recovery after stroke. Evidence suggests that regular training facilitates compensatory plasticity, but frequent training is difficult to integrate into everyday life. Using a wireless electroencephalogram (EEG) system, we implemented a frequent and efficient neurofeedback training at the patients' home. Aiming to overcome maladaptive changes in cortical lateralization patterns we presented a visual feedback, representing the degree of contralateral sensorimotor cortical activity and the degree of sensorimotor cortex lateralization...
July 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28641453/accuracy-of-limited-montage-electroencephalography-in-monitoring-postanoxic-comatose-patients
#3
Sandipan Pati, Lauren McClain, Lidia Moura, Yuan Fan, M Brandon Westover
BACKGROUND: Continuous EEG (cEEG) monitoring may help to identify the small percentage of adults with hypoxic-ischemic encephalopathy (HIE) who will regain consciousness if allowed sufficient time. However, the limited yield in this population has led some to question the cost-effectiveness cEEG monitoring in this population. We hypothesized that limited-montage cEEG could provide essentially the same neurophysiologic information at lower cost. In this proof of concept study, we aim to demonstrate the potentials of limited channel EEG in prognostication in postanoxic patients...
June 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28618836/comparing-eeg-nonlinearity-in-deficit-and-nondeficit-schizophrenia-patients-preliminary-data
#4
Alexander Cerquera, Klevest Gjini, Susan M Bowyer, Nash Boutros
Electroencephalogram (EEG) contains valuable information obtained noninvasively that can be used for assessment of brain's processing capacity of patients with psychiatric disorders. The purpose of the present work was to evaluate possible differences in EEG complexity between deficit (DS) and nondeficit (NDS) subtypes of schizophrenia as a reflection of the cognitive processing capacities in these groups. A particular nonlinear metric known as Lempel-Ziv complexity (LZC) was used as a computational tool in order to determine the randomness in EEG alpha band time series from 3 groups (deficit schizophrenia [n = 9], nondeficit schizophrenia [n = 10], and healthy controls [n = 10]) according to time series randomness...
June 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28612661/is-there-an-association-between-mismatch-negativity-and-cortical-thickness-in-schizophrenia-patients
#5
Jiyoon J Seol, Minah Kim, Kwang Hyuk Lee, Ji-Won Hur, Kang Ik K Cho, Tae Young Lee, Chun Kee Chung, Jun Soo Kwon
INTRODUCTION: Mismatch negativity (MMN) is thought to reflect preattentive, automatic auditory processing. Reduced MMN amplitude is among the most robust findings in schizophrenia research. MMN generators have been shown to be located in the temporal and frontal cortices, which are key areas in the pathophysiology of schizophrenia. This study investigated whether frontotemporal cortical thickness was associated with reduced MMN current source density (CSD) strength in patients with schizophrenia...
June 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28530154/determining-electrode-placement-for-transcranial-direct-current-stimulation-a-comparison-of-eeg-versus-tms-guided-methods
#6
Tonya L Rich, Jeremiah S Menk, Kyle D Rudser, Mo Chen, Gregg D Meekins, Edgar Peña, Timothy Feyma, Kay Bawroski, Christina Bush, Bernadette T Gillick
Transcranial direct current stimulation (tDCS) is increasingly researched as an adjuvant to motor rehabilitation for children with hemiparesis. The optimal method for the primary motor cortex (M1) somatotopic localization for tDCS electrode placement has not been established. The objective, therefore, was to determine the location of the M1 derived using the 10/20 electroencephalography (EEG) system and transcranial magnetic stimulation (TMS) in children with hemiparesis (CWH) and a comparison group of typically developing children (TDC)...
May 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28530153/baseline-sleep-efficiency-and-arousal-index-do-not-predict-who-will-benefit-from-sedatives-in-improving-positive-airway-pressure-adherence-in-sleep-apnea-to-90
#7
R Bart Sangal
Positive airway pressure (PAP) is the preferred treatment for obstructive sleep apnea (OSA), but adherence is low. Educational or ongoing supportive intervention improves the number of PAP adherent patients from the 50% to the 70% range. A common side effect of PAP is increased awakenings. This prospective trial examined baseline polysomnographically derived sleep efficiency and arousal index in PAP adherent and nonadherent patients, and in patients needing sedating medicines to attain PAP adherence versus those who did not need such medicines...
May 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28530152/new-onset-fixation-off-sensitivity-or-scotosensitivity-in-an-adult-male-after-bilateral-embolic-strokes-of-the-parietal-and-occipital-regions
#8
Francis G Tirol
A 50-year old male suffered new-onset clinical and subclinical seizures provoked by acute bilateral embolic strokes in the parietal and occipital regions as a complication of aortic valve replacement surgery. After successful treatment of these refractory symptomatic seizures with intravenous propofol and antiseizure medications, video-EEG recordings revealed acute and transient fixation-off sensitivity or scotosensitivity that resolved within 10 weeks.
May 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28516807/neurofeedback-based-enhancement-of-single-trial-auditory-evoked-potentials-feasibility-in-healthy-subjects
#9
Kathryn Rieger, Marie-Helene Rarra, Nicolas Moor, Laura Diaz Hernandez, Anja Baenninger, Nadja Razavi, Thomas Dierks, Daniela Hubl, Thomas Koenig
Previous studies showed a global reduction of the event-related potential component N100 in patients with schizophrenia, a phenomenon that is even more pronounced during auditory verbal hallucinations. This reduction assumingly results from dysfunctional activation of the primary auditory cortex by inner speech, which reduces its responsiveness to external stimuli. With this study, we tested the feasibility of enhancing the responsiveness of the primary auditory cortex to external stimuli with an upregulation of the event-related potential component N100 in healthy control subjects...
May 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28490194/prepulse-inhibition-of-the-auditory-off-response-a-magnetoencephalographic-study
#10
Eishi Motomura, Koji Inui, Makoto Nishihara, Megumi Tanahashi, Ryusuke Kakigi, Motohiro Okada
A weak preceding sound stimulus attenuates the startle response evoked by an intense sound stimulus. Like startle reflexes, change-related auditory responses are suppressed by a weak leading stimulus (ie, a prepulse). We aim to examine whether a prepulse inhibits cerebral responses to the sound offset and how the prepulse magnitude affects the degree of the prepulse inhibition (PPI). Using magnetoencephalography, we recorded the Off-P50m elicited by an offset of a train sound of 100-Hz clicks in 12 healthy subjects...
May 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27354361/quantitative-eeg-neurometric-analysis-guided-neurofeedback-treatment-in-postconcussion-syndrome-pcs-forty-cases-how-is-neurometric-analysis-important-for-the-treatment-of-pcs-and-as-a-biomarker
#11
Tanju Surmeli, Emin Eralp, Ilham Mustafazade, Ismet Hadi Kos, Gül Elif Özer, Orkun H Surmeli
Postconcussion syndrome (PCS) has been used to describe a range of residual symptoms that persist 12 months or more after the injury, often despite a lack of evidence of brain abnormalities on magnetic resonance imaging and computed tomography scans. In this clinical case series, the efficacy of quantitative EEG-guided neurofeedback in 40 subjects diagnosed with PCS was investigated. Overall improvement was seen in all the primary (Symptom Assessment-45 Questionnaire, Clinical Global Impressions Scale, Hamilton Depression Scale) and secondary measures (Minnesota Multiphasic Personality Inventory, Test of Variables for Attention)...
May 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27287223/slow-activity-in-focal-epilepsy-during-sleep-and-wakefulness
#12
Giovanni Pellegrino, Mario Tombini, Giuseppe Curcio, Chiara Campana, Giovanni Di Pino, Giovanni Assenza, Leo Tomasevic, Vincenzo Di Lazzaro
INTRODUCTION: We aimed to test differences between healthy subjects and patients with respect to slow wave activity during wakefulness and sleep. METHODS: Fifteen patients affected by nonlesional focal epilepsy originating within temporal areas and fourteen matched controls underwent a 24-hour EEG recording. We studied the EEG power spectral density during wakefulness and sleep in delta (1-4 Hz), theta (5-7 Hz), alpha (8-11 Hz), sigma (12-15 Hz), and beta (16-20 Hz) bands...
May 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27287222/how-different-are-the-patients-with-bilateral-hippocampal-sclerosis-from-the-unilateral-ones-clinically
#13
Ebru Nur Vanli-Yavuz, Betul Baykan, Serra Sencer, Altay Sencer, Isin Baral-Kulaksizoglu, Nerses Bebek, Candan Gurses, Aysen Gokyigit
PURPOSE: There is a lack of knowledge on consecutive patients with epilepsy associated with bilateral hippocampal sclerosis (BHS). We aimed to investigate the differentiating features of BHS in comparison with unilateral HS (UHS). METHOD: We investigated our database for patients with epilepsy fulfilling the major magnetic resonance imaging criteria for BHS; namely, presence of bilateral atrophy and high signal changes on T2 and FLAIR series in the hippocampi. UHS patients seen in past 2 years were included as the control group...
May 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27272168/qeeg-and-loreta-in-teenagers-with-conduct-disorder-and-psychopathic-traits
#14
Ana Calzada-Reyes, Alfredo Alvarez-Amador, Lídice Galán-García, Mitchell Valdés-Sosa
BACKGROUND: Few studies have investigated the impact of the psychopathic traits on the EEG of teenagers with conduct disorder (CD). To date, there is no other research studying low-resolution brain electromagnetic tomography (LORETA) technique using quantitative EEG (QEEG) analysis in adolescents with CD and psychopathic traits. OBJECTIVE: To find electrophysiological differences specifically related to the psychopathic traits. The current investigation compares the QEEG and the current source density measures between adolescents with CD and psychopathic traits and adolescents with CD without psychopathic traits...
May 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27170671/transcranial-direct-current-stimulation-over-the-right-frontal-inferior-cortex-decreases-neural-activity-needed-to-achieve-inhibition-a-double-blind-erp-study-in-a-male-population
#15
RANDOMIZED CONTROLLED TRIAL
Salvatore Campanella, Elisa Schroder, Aurore Monnart, Marie-Anne Vanderhasselt, Romain Duprat, Mark Rabijns, Charles Kornreich, Paul Verbanck, Chris Baeken
Inhibitory control refers to the ability to inhibit an action once it has been initiated. Impaired inhibitory control plays a key role in triggering relapse in some pathological states, such as addictions. Therefore, a major challenge of current research is to establish new methods to strengthen inhibitory control in these "high-risk" populations. In this attempt, the right inferior frontal cortex (rIFC), a neural correlate crucial for inhibitory control, was modulated using transcranial direct current stimulation (tDCS)...
May 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27118764/long-term-evolution-electromagnetic-fields-exposure-modulates-the-resting-state-eeg-on-alpha-and-beta-bands
#16
Lei Yang, Qinghua Chen, Bin Lv, Tongning Wu
Long-term evolution (LTE) wireless telecommunication systems are widely used globally, which has raised a concern that exposure to electromagnetic fields (EMF) emitted from LTE devices can change human neural function. To date, few studies have been conducted on the effect of exposure to LTE EMF. Here, we evaluated the changes in electroencephalogram (EEG) due to LTE EMF exposure. An LTE EMF exposure system with a stable power emission, which was equivalent to the maximum emission from an LTE mobile phone, was used to radiate the subjects...
May 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27000108/neurophysiologic-correlates-of-headache-pain-in-subjects-with-major-depressive-disorder
#17
Graham C Scanlon, Felipe A Jain, Aimee M Hunter, Ian A Cook, Andrew F Leuchter
BACKGROUND: Headache pain is often comorbid with major depressive disorder (MDD) and is associated with greater symptom burden, disability, and suicidality. The biological correlates of headache pain in MDD, however, remain obscure. The purpose of this study was to examine the association between brain oscillatory activity and headache pain in MDD subjects. METHODS: A total of 64 subjects with MDD who were free of psychoactive medications were evaluated for severity of headache pain in the past week...
May 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28434238/the-characteristics-and-long-term-course-of-epilepsy-in-lipoid-proteinosis-a-spectrum-from-mild-to-severe-seizures-in-relation-to-ecm1-mutations
#18
Emel Oguz Akarsu, Firdevs Dinçsoy Bir, Can Baykal, Volkan Taşdemir, Bülent Kara, Nerses Bebek, Candan Gürses, Oya Uyguner, Betül Baykan
Lipoid proteinosis (LP) is a rare autosomal recessive disease characterized by deposition of hyaline material in skin and mucosae. Epilepsy, as an extracutaneous manifestation associated with typical mesial temporal calcifications, has already been identified, but its characteristics and long-term prognosis have not been thoroughly investigated. We included 7 consecutive patients with LP with typical intracranial calcifications out of 16 patients with ECM1 mutations and investigated the semiologic features, ictal and interictal EEG findings, and long-term prognosis of epilepsy in this genodermatosis...
April 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27230038/comparison-of-amplitude-integrated-eeg-and-conventional-eeg-in-a-cohort-of-premature-infants
#19
COMPARATIVE STUDY
Irina Meledin, Muhammad Abu Tailakh, Shlomo Gilat, Hagai Yogev, Agneta Golan, Victor Novack, Eilon Shany
OBJECTIVE: To compare amplitude-integrated EEG (aEEG) and conventional EEG (EEG) activity in premature neonates. METHODS: Biweekly aEEG and EEG were simultaneously recorded in a cohort of infants born less than 34 weeks gestation. aEEG recordings were visually assessed for lower and upper border amplitude and bandwidth. EEG recordings were compressed for visual evaluation of continuity and assessed using a signal processing software for interburst intervals (IBI) and frequencies' amplitude...
March 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27193594/cognitive-psychophysiological-substrates-of-affective-temperaments
#20
Burç Çağrı Poyraz, Ayşe Sakallı Kani, Cana Aksoy Poyraz, Tuba Öcek Baş, Mehmet Kemal Arıkan
Affective temperaments are the subclinical manifestations or phenotypes of mood states and hypothetically represent one healthy end of the mood disorder spectrum. However, there is a scarcity of studies investigating the neurobiological basis of affective temperaments. One fundamental aspect of temperament is the behavioral reactivity to environmental stimuli, which can be effectively evaluated by use of cognitive event-related potentials (ERPs) reflecting the diversity of information processing. The aim of the present study is to explore the associations between P300 and the affective temperamental traits in healthy individuals...
March 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
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