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

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https://read.qxmd.com/read/30672308/atypical-sreda-during-wakefulness-nrem-and-rem-sleep-in-a-young-teenager-a-diagnostic-challenge
#1
Laura Gil, Ahsan Moosa, Ajay Gupta
Subclinical rhythmic electrographic discharges of adult (SREDA) is a rare variant considered to be normal in EEG. It consists of sharp-contoured or sinusoidal waveforms in the theta frequency range (usually 5-7 Hz), occurring in a widespread distribution, often maximal over the parietotemporal regions. SREDA is usually bilateral but could be unilateral (atypical SREDA). Compared with true ictal activities, SREDA has little change in frequency, morphology, and distribution. It has been described in adults and is extremely rare in children/adolescents...
January 23, 2019: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://read.qxmd.com/read/30642219/binomial-logistic-regression-and-artificial-neural-network-methods-to-classify-opioid-dependent-subjects-and-control-group-using-quantitative-eeg-power-measures
#2
Turker Tekin Erguzel, Cemal Onur Noyan, Gul Eryilmaz, Barış Önen Ünsalver, Merve Cebi, Cumhur Tas, Nesrin Dilbaz, Nevzat Tarhan
Logistic regression (LR) and artificial neural networks (ANNs) are widely referred approaches in medical data classification studies. LR, a statistical fitting model, is suggested in medical problems because of its well-established methodology and coefficients contributing to the evaluation of clinical interpretations. ANNs are graphical models structured with node networks interconnected with arcs each of which is expressed in terms of weights discovered throughout the modeling process. Since ANNs have a complex structure with its layers and nodes in the layers, which provides ANNs the ability to model any data with complex relationships...
January 14, 2019: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://read.qxmd.com/read/30642208/the-three-nociceptive-responses-of-the-orbicularis-oculi-reflex-in-alzheimer-s-disease-state-of-the-evidence-and-meta-analysis
#3
Juan S Leon-Ariza, Diddier G Prada, Daniel S Leon-Ariza, Camilo Castillo, Fidias E Leon-Sarmiento
There is an emerging belief that electrically elicited blink reflexes (BR) may distinguish Alzheimer's disease (AD) from other disorders characterized by memory dysfunction. To qualitatively and quantitatively distinguish the effects that electrical stimulation has over the blink reflex (eBR) recorded from patients with AD and healthy controls (HCs), we did a systematic review of the literature, and conducted a meta-analysis. Following our selected criteria, 94 AD patients and 97 HCs were identified from articles published in English between 1950 and 2017...
January 14, 2019: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://read.qxmd.com/read/30642197/abnormalities-of-alpha-activity-in-frontocentral-region-of-the-brain-as-a-biomarker-to-diagnose-adolescents-with-bipolar-disorder
#4
Ali Khaleghi, Mohammad Reza Mohammadi, Mahdi Moeini, Hadi Zarafshan, Mahbod Fadaei Fooladi
OBJECTIVES: To investigate brain abnormalities in adolescents with new-onset bipolar disorder (BD) during acute hypomanic and depressive episodes using electroencephalogram (EEG) analysis and to derive a computer-based method for diagnosis of the disorder. METHODS: EEG spectral power and entropy of 21 adolescents with BD (included 11 patients in the hypomanic episode and 10 patients in the depressive episode) and 18 healthy adolescents were compared. Moreover, using significant differences and K-nearest-neighbors (KNN) classifier, it was attempted to distinguish the BD adolescents from normal ones...
January 14, 2019: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://read.qxmd.com/read/30626211/measuring-treatment-response-in-pharmacological-and-lifestyle-interventions-using-electroencephalography-in-adhd-a-review
#5
Anna E Kirkland, Kathleen F Holton
Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by inattention, hyperactivity, and/or impulsivity with associations to short- and long-term aversive life events. The exact etiology of the disorder is still unknown. ADHD is heterogeneous in symptomology and a single consistent, reliable biomarker has not been found. Quantitative electroencephalography (EEG) has been proposed as a potential way to differentiate those with ADHD from typically developing controls; however, the data on the diagnostic utility of this approach have been variable...
January 9, 2019: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://read.qxmd.com/read/30497295/multifeature-mismatch-negativity-in-patients-with-posttraumatic-stress-disorder
#6
Andreas Löw, Johannes D Frey, Robert Gorzka, Anika Engers, Mike Wendt, Helge Höllmer, Thomas Jacobsen
OBJECTIVE: The mismatch negativity (MMN) component of the event-related brain potential has been used to examine auditory monitoring in various mental disorders. Previous research with posttraumatic stress disorder (PTSD) patients has revealed contradictory results. Enhanced as well as diminished MMNs have been obtained. METHOD: The multifeature protocol was employed to investigate the pattern of MMN in 17 military deployment-related PTSD patients and a group of healthy university student controls...
November 29, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://read.qxmd.com/read/30497294/entropy-based-quantitative-electroencephalogram-analysis-for-diagnosing-attention-deficit-hyperactivity-disorder-in-girls
#7
Julie Chi Chow, Chen-Sen Ouyang, Chin-Ling Tsai, Ching-Tai Chiang, Rei-Cheng Yang, Rong-Ching Wu, Hui-Chuan Wu, Lung-Chang Lin
Diagnosis of attention-deficit hyperactivity disorder (ADHD) is currently based on core symptoms or checklists; however, the inevitability of practitioner subjectivity leads to over- and underdiagnosis. Although the Federal Drug Administration has approved an elevated theta/beta ratio (TBR) of the electroencephalogram (EEG) band as a tool for assisting ADHD diagnosis, several studies have reported no significant differences of the TBR between ADHD and control subjects. This study detailed the development of a method based on approximate entropy (ApEn) analysis of EEG to compare ADHD and control groups...
November 29, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://read.qxmd.com/read/30477341/event-related-potentials-are-associated-with-unexpected-gain-and-loss-using-a-gambling-paradigm
#8
Daniela Krause, Andrea Jobst, Shari Marie Langemak, Daniel Keeser, Agnieszka I Chrobok, Simon Langgartner, Kristina Adorjan, Markus Gertzen, Oliver Pogarell, Susanne Karch
OBJECTIVE: Previous neuroimaging studies have described altered activity in brain areas associated with reward processing following reward or punishment. This study examines the extent to which feedback-based experience of gain and loss is associated with electrophysiological correlates. METHODS: Twenty-nine healthy participants used a gambling task that focused on actual nonpredictable gains and losses. During the task, an electroencephalography recording was performed in order to assess reward processing...
November 27, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://read.qxmd.com/read/30474393/auditory-p300-as-a-neurophysiological-correlate-of-symptomatic-improvement-by-transcranial-direct-current-stimulation-in-patients-with-schizophrenia-a-pilot-study
#9
Minah Kim, Tak Hyung Lee, Wu Jeong Hwang, Tae Young Lee, Jun Soo Kwon
BACKGROUND: The reduced amplitude, prolonged latency, and increased intertrial variability of auditory P300 have been consistently reported in relation to the symptomatic severity of schizophrenia. This study investigated whether auditory P300 event-related potentials can be used as an objective indicator of symptomatic improvement by transcranial direct current stimulation (tDCS) in patients with schizophrenia. METHODS: Ten patients with schizophrenia received 20 minutes of 2-mA tDCS twice a day for 5 consecutive weekdays...
November 25, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://read.qxmd.com/read/30453757/eeg-neurofeedback-training-in-children-with-attention-deficit-hyperactivity-disorder-a-cognitive-and-behavioral-outcome-study
#10
E A Shereena, R K Gupta, C N Bennett, K J V Sagar, J Rajeswaran
BACKGROUND: Attention deficit/hyperactivity disorder (ADHD) is a highly prevalent childhood disorder with symptoms of inattention, impulsivity, and hyperactivity. EEG neurofeedback training (NFT) is a new intervention modality based on operant conditioning of brain activity, which helps reduce symptoms of ADHD in children. METHODS AND PROCEDURES: To examine the efficacy of NFT in children with ADHD, an experimental longitudinal design with pre-post comparison was adopted...
November 20, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://read.qxmd.com/read/30428706/association-between-positive-occipital-sharp-transients-of-sleep-and-lambda-waves
#11
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://read.qxmd.com/read/30417664/eeg-resting-state-networks-responsible-for-gait-disturbance-features-in-idiopathic-normal-pressure-hydrocephalus
#12
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://read.qxmd.com/read/29611429/evaluating-the-contribution-of-eeg-power-profiles-to-characterize-and-discriminate-posttraumatic-stress-symptom-factors-in-a-combat-exposed-population
#13
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://read.qxmd.com/read/29322820/reevaluation-of-the-critically-ill-patients-with-nonconvulsive-status-epilepticus-by-using-salzburg-consensus-criteria
#14
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://read.qxmd.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
#15
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://read.qxmd.com/read/30280595/altered-functional-connectivity-of-alpha-rhythm-in-obsessive-compulsive-disorder-during-rest
#16
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://read.qxmd.com/read/30280591/amplitude-instability-of-somatosensory-evoked-potentials-as-an-indicator-of-delayed-cerebral-ischemia-in-a-case-of-subarachnoid-hemorrhage
#17
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://read.qxmd.com/read/30246558/analysis-of-relation-between-electroclinical-features-and-cerebrospinal-fluid-antibody-titers-in-patients-with-anti-nmdar-encephalitis
#18
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://read.qxmd.com/read/30229671/a-meta-analysis-of-the-effect-of-multisession-transcranial-direct-current-stimulation-on-cognition-in-dementia-and-mild-cognitive-impairment
#19
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://read.qxmd.com/read/30198328/correlations-between-cognitive-aspects-and-quantitative-eeg-in-adults-with-epilepsy
#20
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)
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