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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/30428706/association-between-positive-occipital-sharp-transients-of-sleep-and-lambda-waves
#1
Ushtar Amin, Lucy Sullivan, Pat Trudeau, Selim R Benbadis
Positive occipital sharp transients of sleep (POSTS) and lambda waves have similar morphology and location. We studied a possible association between these 2 normal EEG patterns. We reviewed a series of consecutive unselected ambulatory EEGs during a 3-month period (October 16, 2017 to January 19, 2018) and identified records with POSTS and records with lambda waves. Statistical analysis was performed using a chi-square test. A total of 140 ambulatory EEGs were reviewed. Duration of EEGs ranged from 24 to 168 hours (mean 76 hours)...
November 14, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/30417664/eeg-resting-state-networks-responsible-for-gait-disturbance-features-in-idiopathic-normal-pressure-hydrocephalus
#2
Yasunori Aoki, Hiroaki Kazui, Roberto D Pascual-Marqui, Ryouhei Ishii, Kenji Yoshiyama, Hideki Kanemoto, Yukiko Suzuki, Shunsuke Sato, Shingo Azuma, Takashi Suehiro, Takuya Matsumoto, Masahiro Hata, Leonides Canuet, Masao Iwase, Manabu Ikeda
Idiopathic normal pressure hydrocephalus (iNPH) is a neuropsychiatric disease characterized by gait disturbance, cognitive dysfunction, and urinary incontinence that affects a large population of elderly people. These symptoms, especially gait disturbance, can potentially be improved by cerebrospinal fluid (CSF) drainage, which is more effective if performed at an early stage of the disease. However, the neurophysiological mechanisms of these symptoms and their recovery by CSF drainage are poorly understood...
November 11, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/30322279/quantitative-and-qualitative-comparison-of-eeg-based-neural-network-organization-in-two-schizophrenia-groups-differing-in-the-duration-of-illness-and-disease-burden-graph-analysis-with-application-of-the-minimum-spanning-tree
#3
Kamil Jonak, Paweł Krukow, Katarzyna E Jonak, Cezary Grochowski, Hanna Karakuła-Juchnowicz
The aim of this study was to compare neural network topology of 30 patients with first episode schizophrenia (FES) and 30 multiepisode schizophrenia (mean number of psychotic relapses =4 years, duration of illness >5 years) patients, who were assessed with graph theory methods. This comparison was designed to identify network differences, which might be assigned to the burden of a mental disease. To estimate functional connectivity, we applied the phase lag index algorithm and the minimum spanning tree (MST) for the characterization of network topology...
October 16, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/30280595/altered-functional-connectivity-of-alpha-rhythm-in-obsessive-compulsive-disorder-during-rest
#4
Bo Tan, Qingxiao Liu, Chaoyang Wan, Zhenlan Jin, Yanchun Yang, Ling Li
Obsessive-compulsive disorder (OCD) is a common inheritable psychiatric disorder characteristic of repetitive thinking, imagination (obsession), and stereotyped behaviors (compulsive). To explore whether there is an alteration of brain functional connectivity (BFC) in patients with OCD during rest, electroencephalogram (EEG) data of healthy controls (HCs) and patients with OCD were collected during rest in both eyes-closed and eyes-open states. Synchronization likelihood and graph theory were applied to construct and analyze brain functional networks of patients with OCD and HCs...
October 3, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/30280591/amplitude-instability-of-somatosensory-evoked-potentials-as-an-indicator-of-delayed-cerebral-ischemia-in-a-case-of-subarachnoid-hemorrhage
#5
Maddalena Spalletti, Vanni Orzalesi, Riccardo Carrai, Luca Bucciardini, Cesarina Cossu, Maenia Scarpino, Enrico Fainardi, Marinella Marinoni, Antonello Grippo, Aldo Amantini
We describe a 55-year-old male patient with a subarachnoid hemorrhage (SAH) as a result of left middle cerebral artery (MCA) aneurysm rupture, who underwent continuous electroencephalogram (EEG) and somatosensory evoked potential (cEEG-SEP) monitoring that showed an unusual SEP trend pattern. EEG was continuously recorded, and SEPs following stimulation of median nerves were recorded every 50 minutes, with the amplitude and latency of the cortical components automatically trended. An increase in intracranial pressure required a left decompressive craniectomy...
October 3, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/30246558/analysis-of-relation-between-electroclinical-features-and-cerebrospinal-fluid-antibody-titers-in-patients-with-anti-nmdar-encephalitis
#6
Ailiang Miao, Mingyang Du, Lingling Wang, Jianqing Ge, Hengdong Lu, Haiyan Xu, Hongxing Liu, Chuanyong Yu, Caiyun Wu, Yuan Gao, Jintao Sun, Qi Shi, Xiaoshan Wang
PURPOSE: This study aimed to determine the relation between electroclinical features and cerebrospinal fluid (CSF) antibody titers in patients with anti- N-methyl-d-aspartate receptor (anti-NMDAR) encephalitis. METHOD: Clinical symptoms and electroencephalography (EEG) at different stages were analyzed in 51 hospitalized patients with anti-NMDAR encephalitis. RESULTS: Behavioral changes were the initial symptoms in 90.9% (20/22) of female patients with high (1:10 or 1:32) CSF antibody titers...
September 24, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/30229671/a-meta-analysis-of-the-effect-of-multisession-transcranial-direct-current-stimulation-on-cognition-in-dementia-and-mild-cognitive-impairment
#7
Takuma Inagawa, Zui Narita, Norio Sugawara, Kazushi Maruo, Andrew Stickley, Yuma Yokoi, Tomiki Sumiyoshi
There have been increasing efforts to investigate the effects of neuromodulation techniques, such as transcranial direct current stimulation (tDCS), on cognitive impairment in dementia and related conditions. In this systematic review and meta-analysis, we assessed the efficacy of multisession anodal tDCS compared with sham stimulation for improving global cognition and specific cognitive domains in both Alzheimer's disease and mild cognitive impairment. Eight articles meeting the criteria for inclusion in the meta-analysis were selected...
September 19, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/30198328/correlations-between-cognitive-aspects-and-quantitative-eeg-in-adults-with-epilepsy
#8
Gloria Maria Tedrus, Leandro M Negreiros, Raquel S Ballarim, Tamires A Marques, Lineu Correa Fonseca
INTRODUCTION: Cognitive impairment frequently occurs in adult patients with epilepsy (PWE), but its pathophysiological basis is not well known. This study assessed cognition and its correlations with quantitative EEG coherence (QEEG) of patients with epilepsy. METHOD: Eighty PWE seen consecutively in the clinic and 40 normal subjects (NC) were assessed by neurological evaluation, Mini Mental State Examination, immediate and delayed recall of 10 simple figures, phonemic verbal fluency (FAS), category fluency test (VF animals), clock drawing, and QEEG...
September 10, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/30182751/resting-eeg-measures-of-brain-arousal-in-a-multisite-study-of-major-depression
#9
Christine Ulke, Craig E Tenke, Jürgen Kayser, Christian Sander, Daniel Böttger, Lidia Y X Wong, Jorge E Alvarenga, Maurizio Fava, Patrick J McGrath, Patricia J Deldin, Melvin G Mcinnis, Madhukar H Trivedi, Myrna M Weissman, Diego A Pizzagalli, Ulrich Hegerl, Gerard E Bruder
Several studies have found upregulated brain arousal during 15-minute EEG recordings at rest in depressed patients. However, studies based on shorter EEG recording intervals are lacking. Here we aimed to compare measures of brain arousal obtained from 2-minute EEGs at rest under eyes-closed condition in depressed patients and healthy controls in a multisite project-Establishing Moderators and Biosignatures of Antidepressant Response for Clinical Care (EMBARC). We expected that depressed patients would show stable and elevated brain arousal relative to controls...
September 5, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/30175598/evoked-potentials-investigations-of-deficit-versus-nondeficit-schizophrenia-eeg-meg-preliminary-data
#10
Nash N Boutros, Klevest Gjini, Frank Wang, Susan M Bowyer
Heterogeneity of schizophrenia is a major obstacle toward understanding the disorder. One likely subtype is the deficit syndrome (DS) where patients suffer from predominantly negative symptoms. This study investigated the evoked responses and the evoked magnetic fields to identify the neurophysiological deviations associated with the DS. Ten subjects were recruited for each group (Control, DS, and Nondeficit schizophrenia [NDS]). Subjects underwent magnetoencephalography (MEG) and electroencephalography (EEG) testing while listening to an oddball paradigm to generate the P300 as well as a paired click paradigm to generate the mid-latency auditory-evoked responses (MLAER) in a sensory gating paradigm...
September 3, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29611429/evaluating-the-contribution-of-eeg-power-profiles-to-characterize-and-discriminate-posttraumatic-stress-symptom-factors-in-a-combat-exposed-population
#11
Christina M Sheerin, Laura M Franke, Steven H Aggen, Ananda B Amstadter, William C Walker
This study investigated the use of resting-state electroencephalography (EEG) data to help differentiate posttraumatic stress disorder (PTSD) symptom factors. The sample, 147 combat-exposed OIF/OEF (Operation Iraqi Freedom/Operation Enduring Freedom) Veterans and service members, was a polytrauma population with variable PTSD and mild traumatic brain injury (mTBI) diagnoses. Participants completed the PTSD Checklist (PCL) and resting-state EEG was assessed for 10 minutes, with eyes closed. Regional averages of absolute power in alpha, beta, delta, and theta frequency bands were computed to estimate a single EEG common factor per band...
November 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29322820/reevaluation-of-the-critically-ill-patients-with-nonconvulsive-status-epilepticus-by-using-salzburg-consensus-criteria
#12
Ozlem Gungor Tuncer, Ebru Altindag, Sevda Ozel Yildiz, Mecbure Nalbantoglu, Mehmet Eren Acik, Sedef Tavukcu Ozkan, Betul Baykan
OBJECTIVE: We aimed to assess the usefulness of the Salzburg Consensus Criteria (SCC) for determining the prognosis of critically ill patients with nonconvulsive status epilepticus (NCSE). METHODS: We retrospectively reviewed consecutive patients with unconsciousness followed up in the intensive care unit (ICU). Three clinical neurophysiologists, one of them blinded to clinical and laboratory data, reevaluated all EEG data independently and determined NCSE according to SCC...
November 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
#13
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...
September 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29224411/change-in-quantitative-eeg-theta-cordance-as-a-potential-predictor-of-repetitive-transcranial-magnetic-stimulation-clinical-outcome-in-major-depressive-disorder
#14
Aimee M Hunter, Thien X Nghiem, Ian A Cook, David E Krantz, Michael J Minzenberg, Andrew F Leuchter
Repetitive transcranial magnetic stimulation (rTMS) has demonstrated efficacy in major depressive disorder (MDD), although clinical outcome is variable. Change in the resting-state quantitative electroencephalogram (qEEG), particularly in theta cordance early in the course of treatment, has been linked to antidepressant medication outcomes but has not been examined extensively in clinical rTMS. This study examined change in theta cordance over the first week of clinical rTMS and sought to identify a biomarker that would predict outcome at the end of 6 weeks of treatment...
September 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29214865/automatic-seizure-detection-based-on-morphological-features-using-one-dimensional-local-binary-pattern-on-long-term-eeg
#15
P P Muhammed Shanir, Kashif Ahmad Khan, Yusuf Uzzaman Khan, Omar Farooq, Hojjat Adeli
Epileptic neurological disorder of the brain is widely diagnosed using the electroencephalography (EEG) technique. EEG signals are nonstationary in nature and show abnormal neural activity during the ictal period. Seizures can be identified by analyzing and obtaining features of EEG signal that can detect these abnormal activities. The present work proposes a novel morphological feature extraction technique based on the local binary pattern (LBP) operator. LBP provides a unique decimal value to a sample point by weighing the binary outcomes after thresholding the neighboring samples with the present sample point...
September 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29186977/ictal-rhythmic-alpha-sinusoidal-waves-in-3-cases-of-anti-nmdar-encephalitis
#16
Ailiang Miao, Xiaoshan Wang
Previous studies have shown that extreme delta brush and high beta/delta power ratio on electroencephalogram are suggestive of anti- N-methyl-d-aspartate receptor (anti-NMDAR) encephalitis. Here we report 3 anti-NMDAR encephalitis patients with ictal rhythmic alpha sinusoidal waves in temporal regions, which suggested electrographic seizures in anti-NMDAR encephalitis and indicated potential for seizure occurrence in the future. Rhythmic alpha sinusoidal waves may be an electrographic feature and helpful in distinguishing anti-NMDAR encephalitis...
September 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29161906/association-between-pathology-and-electroencephalographic-activity-in-parkinson-s-disease
#17
John N Caviness, Thomas G Beach, Joseph G Hentz, Holly A Shill, Erika D Driver-Dunckley, Charles H Adler
INTRODUCTION: The key mechanisms that connect Parkinson's disease pathology with dementia are unclear. We tested the hypothesis that the quantitative spectral electroencephalographic measure, delta bandpower, correlates with Lewy type synucleinopathy on pathological examination in Parkinson's disease. As a corollary hypothesis, we analyzed whether there would be delta bandpower electroencephalographic differences between Parkinson's disease dementia cases with and without pathological criteria for Alzheimer's disease...
September 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29161899/how-long-should-routine-eeg-be-recorded-to-get-relevant-information
#18
Hannah Doudoux, Kristina Skaare, Thomas Geay, Philippe Kahane, Jean L Bosson, Cécile Sabourdy, Laurent Vercueil
OBJECTIVE: The optimal duration of routine EEG (rEEG) has not been determined on a clinical basis. This study aims to determine the time required to obtain relevant information during rEEG with respect to the clinical request. METHOD: All rEEGs performed over 3 months in unselected patients older than 14 years in an academic hospital were analyzed retrospectively. The latency required to obtain relevant information was determined for each rEEG by 2 independent readers blinded to the clinical data...
September 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29161897/status-epilepticus-and-multiple-sclerosis-a-case-presentation-and-literature-review
#19
REVIEW
Murat Mert Atmaca, Candan Gurses
PURPOSE: To search the literature for the frequency, pathogenesis, prognosis, and treatment of seizures and status epilepticus (SE) in patients with multiple sclerosis (MS). METHODS: We report 2 patients with MS who presented with SE and review the literature. RESULTS: Seizures and SE episodes worsened during MS relapses in the first patient. SE episodes and MS relapses significantly decreased after initiation of natalizumab treatment but she still had seizures and was taking 4 antiepileptic drugs (AEDs)...
September 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29161891/the-significance-of-impulsive-error-in-children-with-adhd
#20
Yu-Chi Liao, Nai-Wen Guo, Shin-Jaw Chen, Hsing-Fang Tsai, Jhih-Hong Fang, Jia-Jin Chen, Bei-Yi Su
A deficit of inhibition ability is a neuropsychological problem in children with attention deficit hyperactivity disorder (ADHD). We investigated whether in children who made impulsive error (IE), less error-related negativity (ERN) would correlate with poorer executive attention functions (EAFs). Ninety children (49 with ADHD and 41 without ADHD) were investigated by a 4-minute simple reaction time task and simultaneous electroencephalogram. When they made IE, the ERN in response-locked event-related potential (ERP) was defined as error awareness...
September 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
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