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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/29984606/early-intervention-with-adrenocorticotropin-for-acute-encephalopathy-associated-epileptic-spasms-report-of-two-cases
#1
Kousuke Yonemoto, Yuko Ichimiya, Masafumi Sanefuji, Noriyuki Kaku, Ayumi Sakata, Rieko Baba, Fumiya Yamashita, Satoshi Akamine, Michiko Torio, Yoshito Ishizaki, Yoshihiko Maehara, Yasunari Sakai, Shouichi Ohga
PURPOSE: Acute encephalopathy with biphasic seizures and reduced diffusion (AESD) is a leading cause of childhood-onset encephalopathy in Japan. Children with AESD frequently develop intractable epilepsy, whereas their treatment options remain to be determined. METHOD: We present 2 unrelated girls, who developed AESD at 25 months (case 1) and 12 months of age (case 2). Both cases underwent intensive cares from the first day of illness, whereas severe neurological impairments were left on discharge...
July 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29984595/high-frequencies-in-qeeg-are-related-to-the-level-of-insight-in-patients-with-schizophrenia
#2
Mehmet Kemal Arikan, Baris Metin, Sinem Zeynep Metin, Emine Elif Tülay, Nevzat Tarhan
Lack of insight is a neurocognitive problem commonly encountered in patients with psychotic disorders that negatively affects treatment compliance and prognosis. Measurement of insight is based on self-report scales, which are limited due to subjectivity. This study aimed to determine the correlation between resting state beta and gamma power in 23 patients with schizophrenia and insight. It was observed that as beta and gamma power measured via qualitative electroencephalography (qEEG) increased the level of insight decreased...
July 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29940782/predicting-clinical-gains-and-side-effects-of-stimulant-medication-in-pediatric-attention-deficit-hyperactivity-disorder-by-combining-measures-from-qeeg-and-erps-in-a-cued-go-nogo-task
#3
Geir Ogrim, Juri D Kropotov
OBJECTIVES: The study aim was to develop 2 scales: predicting clinical gains and risk of acute side effects of stimulant medication in pediatric attention-deficit/hyperactivity disorder (ADHD), combining measures from EEG spectra, event-related potentials (ERPs), and a cued visual GO/NOGO task. METHODS: Based on 4-week systematic medication trials, 87 ADHD patients aged 8 to 17 years were classified as responders (REs, n = 62) or non-REs (n = 25), and belonging to the side effects (SEs, n = 42) or no-SEs (n = 45) groups...
June 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29929395/the-longitudinal-effects-of-electroconvulsive-therapy-on-ictal-interhemispheric-coherence-and-its-associations-with-treatment-outcome-a-naturalistic-cohort-study
#4
Freek Ten Doesschate, Guido A van Wingen, Boudewijn J H B de Pont, Martijn Arns, Jeroen A van Waarde
OBJECTIVES: Electroconvulsive therapy (ECT) is an effective treatment for severe depression. Electroencephalogram (EEG) measures between ECT sessions seem to be related to the antidepressant efficacy of ECT. In this naturalistic cohort study, we examine longitudinal effects of ECT on interhemispheric EEG coherence measures during seizure activity and its relation to the antidepressant efficacy. METHODS: This study included 65 patients diagnosed with severe depressive disorder...
June 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29925268/multimodal-neuroimaging-basic-concepts-and-classification-of-neuropsychiatric-diseases
#5
Emine Elif Tulay, Barış Metin, Nevzat Tarhan, Mehmet Kemal Arıkan
Neuroimaging techniques are widely used in neuroscience to visualize neural activity, to improve our understanding of brain mechanisms, and to identify biomarkers-especially for psychiatric diseases; however, each neuroimaging technique has several limitations. These limitations led to the development of multimodal neuroimaging (MN), which combines data obtained from multiple neuroimaging techniques, such as electroencephalography, functional magnetic resonance imaging, and yields more detailed information about brain dynamics...
June 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29914268/levodopa-reduces-the-phase-lag-index-of-parkinson-s-disease-patients-a-magnetoencephalographic-study
#6
Chunyan Cao, Dianyou Li, Ke Zeng, Shikun Zhan, Peng Huang, Xiaoli Li, Bomin Sun
OBJECTIVES: As a method of measuring the phase difference between 2 signals, the phase lag index (PLI) of the alpha and beta bands in patients with Parkinson's disease (PD) was investigated by using magnetoencephalography (MEG). METHODS: Eighteen PD patients were measured by MEG in the state of overnight withdrawal of levodopa and after levodopa treatment; meanwhile, Unified Parkinson's Disease Rating Scale (UPDRS) III scale was evaluated. RESULTS: Compared with healthy controls, alpha (8-13 Hz) PLI in the frontal and parietal areas elevated in PD patients, while the elevation was reversed by the levodopa treatment...
June 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29914267/latent-schizencephaly-with-psychotic-phenotype-or-schizophrenia-with-schizencephaly-a-case-report-and-review-of-the-literature
#7
Filip Tylš, Martin Brunovský, Kateřina Šulcová, Barbora Kohútová, Zuzana Ryznarová, Miloslav Kopeček
OBJECTIVES: Although schizencephaly belongs to the class of neurodevelopmental disorders, which are a well-known predisposing factor for psychosis, there is a lack of relevant studies and diagnostic guidelines on this relationship. METHOD: A case report of first-episode psychosis with persistent negative symptoms associated with schizencephaly is described and compared with 7 other cases found in the literature. RESULTS: We found perinatal pathology, cognitive deficit, and EEG abnormality in a patient with atypical initial symptoms of psychosis such as olfactory hallucinations...
June 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29877098/abnormal-eeg-power-spectra-in-acute-transient-global-amnesia-a-quantitative-eeg-study
#8
Claudio Imperatori, Benedetto Farina, Federico Todini, Chiara Di Blasi, Edoardo Mazzucchi, Valerio Brunetti, Giacomo Della Marca
Transient global amnesia (TGA) is a clinical syndrome characterized by retrograde and anterograde amnesia without other neurological deficits. Although electroencephalography (EEG) methods are commonly used in both clinical and research setting with TGA patients, few studies have investigated neurophysiological pattern in TGA using quantitative EEG (qEEG). The main aim of the present study was to extend these previous findings by exploring EEG power spectra differences between patients with acute TGA and healthy controls using the exact low-resolution brain electromagnetic tomography software (eLORETA)...
June 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29788790/eeg-differences-in-two-clinically-similar-rapid-dementias-voltage-gated-potassium-channel-complex-associated-autoimmune-encephalitis-and-creutzfeldt-jakob-disease
#9
Brin Freund, John C Probasco, Mackenzie C Cervenka, Raoul Sutter, Peter W Kaplan
Distinguishing treatable causes for rapidly progressive dementia from those that are incurable is vital. Creutzfeldt-Jakob disease (CJD) and voltage-gated potassium channel complex-associated autoimmune encephalitis (VGKC AE) are 2 such conditions with disparate outcomes and response to treatment. To determine the differences in electroencephalography between CJD and VGKC AE, we performed a retrospective review of medical records and examined clinical data, neuroimaging, and electroencephalographs performed in patients admitted for evaluation for rapidly progressive dementia diagnosed with CJD and VGKC AE at the Johns Hopkins Hospital and Bayview Medical Center between January 1, 2007 and December 31, 2015...
May 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29788788/diagnostic-performance-of-the-electroencephalogram-in-the-elderly-manifesting-with-episodes-of-unresponsiveness
#10
Chusak Limotai, Patcharapa Tasanaworapunya, Iyavut Thaipisuttikul
This study aimed to determine diagnostic performance of the EEG in diagnosing seizures and to ascertain risk factors associated with seizures in the elderly presenting with episodes of unresponsiveness compared with younger patients. This is a cross-sectional study. Only EEGs requested with indication of transient unresponsiveness (TUR) were included. Patients were divided into 2 groups, younger (aged 18-49 years) and elderly (aged >60 years). The EEG was an index test. Reference standard, independently verified by 2 board-certified neurologists, was a clinical diagnosis of presence or absence of epilepsy/probable seizures...
May 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29788779/elevated-serum-lipid-peroxidation-and-reduced-vitamin-c-and-trace-element-concentrations-are-correlated-with-epilepsy
#11
Abhijit Das, Md Shahid Sarwar, Md Shohel Hossain, Palash Karmakar, Mohammad Safiqul Islam, Mohammad Enayet Hussain, Sujan Banik
BACKGROUND: Epilepsy is one of the chronic and heterogeneous epidemic neurological disorders leading to substantial mortality. The aim of the present study was to investigate the serum levels of malondialdehyde (MDA), vitamin C, and trace elements namely zinc (Zn), copper (Cu), and manganese (Mn) in epileptic patients of Bangladesh and to establish if there are any pathophysiological correlations. METHODS: This was a case-control study with 40 generalized epileptic patients and 40 healthy subjects as controls...
May 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29788768/short-term-impact-of-tdcs-over-the-right-inferior-frontal-cortex-on-impulsive-responses-in-a-go-no-go-task
#12
Salvatore Campanella, Elisa Schroder, Marie-Anne Vanderhasselt, Chris Baeken, Charles Kornreich, Paul Verbanck, Boris Burle
Inhibitory control, a process deeply studied in laboratory settings, refers to the ability to inhibit an action once it has been initiated. A common way to process data in such tasks is to take the mean response time (RT) and error rate per participant. However, such an analysis ignores the strong dependency between spontaneous RT variations and error rate. Conditional accuracy function (CAF) is of particular interest, as by plotting the probability of a response to be correct as a function of its latency, it provides a means for studying the strength of impulsive responses associated with a higher frequency of fast response errors...
May 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29502452/auditory-mismatch-negativity-and-p300a-elicited-by-the-optimal-multi-feature-paradigm-in-early-schizophrenia
#13
Derek J Fisher, Debra J Campbell, Shelagh C Abriel, Emma M L Ells, Erica D Rudolph, Philip G Tibbo
The mismatch negativity (MMN) is an EEG-derived event-related potential (ERP) elicited by any violation of a predicted auditory "rule," regardless of whether one is attending to the stimuli and is thought to reflect updating of the stimulus context. Redirection of attention toward a rare, distracting stimulus event, however, can be measured by the subsequent P3a component of the P300. Chronic schizophrenia patients exhibit robust MMN deficits, as well as reductions in P3a amplitude. While, the substantial literature on the MMN in first-episode and early phase schizophrenia in this population reports reduced amplitudes, there also exist several contradictory studies...
July 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29502434/using-mismatch-negativity-to-investigate-the-pathophysiology-of-substance-use-disorders-and-comorbid-psychosis
#14
Jessica U Ramlakhan, Reza Zomorrodi, Jonathan Downar, Daniel M Blumberger, Zafiris J Daskalakis, Tony P George, Michael Kiang, Mera S Barr
Substance use disorders (SUDs) have a devastating impact on society and place a heavy burden on health care systems. Given that alcohol, tobacco, and cannabis use have the highest prevalence, further understanding of the underlying pathophysiology of these SUDs is crucial. Electroencephalography is an inexpensive, temporally superior, and translatable technique which enables investigation of the pathobiology of SUDs through the evaluation of various event-related potential components, including mismatch negativity (MMN)...
July 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29382210/event-related-potentials-in-the-clinical-high-risk-chr-state-for-psychosis-a-systematic-review
#15
Jennifer R Lepock, Romina Mizrahi, Michele Korostil, R Michael Bagby, Elizabeth W Pang, Michael Kiang
There is emerging evidence that identification and treatment of individuals in the prodromal or clinical high-risk (CHR) state for psychosis can reduce the probability that they will develop a psychotic disorder. Event-related brain potentials (ERPs) are a noninvasive neurophysiological technique that holds promise for improving our understanding of neurocognitive processes underlying the CHR state. We aimed to systematically review the current literature on cognitive ERP studies of the CHR population, in order to summarize and synthesize the results, and their implications for our understanding of the CHR state...
July 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29172703/quantitative-eeg-parameters-for-prediction-of-outcome-in-severe-traumatic-brain-injury-development-study
#16
Antti Tolonen, Mika O K Särkelä, Riikka S K Takala, Ari Katila, Janek Frantzén, Jussi P Posti, Markus Müller, Mark van Gils, Olli Tenovuo
Monitoring of quantitative EEG (QEEG) parameters in the intensive care unit (ICU) can aid in the treatment of traumatic brain injury (TBI) patients by complementing visual EEG review done by an expert. We performed an explorative study investigating the prognostic value of 59 QEEG parameters in predicting the outcome of patients with severe TBI. Continuous EEG recordings were done on 28 patients with severe TBI in the ICU of Turku University Hospital. We computed a set of QEEG parameters for each patient, and correlated these to patient outcome, measured by dichotomized Glasgow Outcome Scale (GOS) at a follow-up visit between 6 and 12 months, using area under receiver operating characteristic curve (AUC) as a nonlinear correlation measure...
July 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29161898/delta-brush-pattern-is-not-unique-to-nmdar-encephalitis-evaluation-of-two-independent-long-term-eeg-cohorts
#17
Betul Baykan, Ozlem Gungor Tuncer, Ebru Nur Vanli-Yavuz, Leyla Baysal Kirac, Gokcen Gundogdu, Nerses Bebek, Candan Gurses, Ebru Altindag, Erdem Tuzun
PURPOSE: Although its specificity has not previously been investigated in other cohorts, delta brush pattern (DBP) is increasingly reported in the EEGs of patients with anti- N-methyl-d-aspartate receptor (NMDAR) encephalitis. METHODS: We aimed to investigate the DBP in the EEGs of 2 cohorts; patients with change in consciousness for various causes monitored in the intensive care unit (ICU) (n = 106) and patients with mesial temporal lobe epilepsy (MTLE) with or without antineuronal antibodies (n = 76)...
July 2018: 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
#18
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...
July 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/28118746/frontal-intermittent-rhythmic-delta-activity-firda-in-the-neurological-intensive-care-prevalence-determinants-and-clinical-significance
#19
Nese Dericioglu, Farid Khasiyev, E Murat Arsava, M Akif Topcuoglu
INTRODUCTION: Frontal intermittent rhythmic delta activity (FIRDA), a transient rhythmic slow wave pattern over the anterior EEG leads, has been reported in a wide variety of cerebral lesions and different metabolic disturbances. Few authors have analyzed the frequency and clinical significance of FIRDA in the critical care setting. We aimed to better understand these issues in our intensive care cohort and if possible, try to delineate its underlying mechanisms. METHODS: Video-EEG reports of consecutive adult patients in the neurological intensive care unit (NICU) since 2009 were retrospectively reviewed to identify cases with FIRDA...
July 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27807013/beta-responses-in-healthy-elderly-and-in-patients-with-amnestic-mild-cognitive-impairment-during-a-task-of-temporal-orientation-of-attention
#20
Giuseppe Caravaglios, Giuseppe Castro, Emma Gabriella Muscoso, Davide Crivelli, Michela Balconi
Recent studies demonstrated that beta oscillations are elicited during cognitive processes. To investigate their potential as electrophysiological markers of amnestic mild cognitive impairment (aMCI), we recorded beta EEG activity during resting and during an omitted tone task in patients and healthy elderly. Thirty participants were enrolled (15 patients, 15 healthy controls). In particular, we investigated event-related spectral perturbation and intertrial coherence indices. Analyses showed that ( a) healthy elderly presented greater beta power at rest than patients with aMCI patients; ( b) during the task, healthy elderly were more accurate than aMCI patients and presented greater beta power than aMCI patients; ( c) both groups showed qualitatively similar spectral perturbation responses during the task, but different spatiotemporal response patterns; and ( d) aMCI patients presented greater beta phase locking than healthy elderly during the task...
July 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
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