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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/29382210/event-related-potentials-in-the-clinical-high-risk-chr-state-for-psychosis-a-systematic-review
#1
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...
January 1, 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
#2
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...
January 1, 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29308656/nrem-sleep-and-antiepileptic-medications-modulate-epileptiform-activity-by-altering-cortical-synchrony
#3
Chetan S Nayak, N Mariyappa, Kaushik K Majumdar, G S Ravi, Pradeep D Prasad, Madhu Nagappa, Thennarasu Kandavel, Arun B Taly, Sanjib Sinha
INTRODUCTION: The activating role of non-rapid eye movement (NREM) sleep on epileptic cortex and conversely, the seizure remission brought about by antiepileptic medications, has been attributed to their effects on neuronal synchrony. This study aims to understand the role of neural synchrony of NREM sleep in promoting interictal epileptiform discharges (IEDs) in patients with epilepsy (PWE) by assessing the peri-IED phase synchrony during awake and sleep states. It also studies the role played by antiepileptic drugs (AEDs) on EEG desynchronization in the above cohort...
December 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29284291/the-use-of-quantitative-eeg-for-differentiating-frontotemporal-dementia-from-late-onset-bipolar-disorder
#4
Sinem Zeynep Metin, Turker Tekin Erguzel, Gulhan Ertan, Celal Salcini, Betul Kocarslan, Merve Cebi, Baris Metin, Oguz Tanridag, Nevzat Tarhan
The behavioral variant frontotemporal dementia (bvFTD) usually emerges with behavioral changes similar to changes in late-life bipolar disorder (BD) especially in the early stages. According to the literature, a substantial number of bvFTD cases have been misdiagnosed as BD. Since the literature lacks studies comparing differential diagnosis ability of electrophysiological and neuroimaging findings in BD and bvFTD, we aimed to show their classification power using an artificial neural network and genetic algorithm based approach...
December 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29268620/clinical-and-biochemical-outcomes-following-eeg-neurofeedback-training-in-traumatic-brain-injury-in-the-context-of-spontaneous-recovery
#5
Cathlyn N Bennett, Rajnish K Gupta, Puttachandra Prabhakar, Rita Christopher, Somanna Sampath, K Thennarasu, Jamuna Rajeswaran
It has been found that reduction of posttraumatic stress symptoms is positively associated with the reduction of postconcussive symptoms. Cortisol is commonly used as a biomarker of stress. Understanding the role of posttraumatic stress and cortisol in symptom reduction has implication for neuropsychological rehabilitation particularly in the context of spontaneous recovery. OBJECTIVE: The aim of the research was to study the effectiveness of EEG neurofeedback training on clinical symptoms, perceived stress, and cortisol in traumatic brain injury (TBI) patients in the context of spontaneous recovery...
December 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29262725/does-valproic-acid-na-valproate-suppress-auditory-startle-reflex-in-patients-with-epilepsy
#6
Meral E Kızıltan, Leyla Köse Leba, Ayşegül Gündüz, Nevin Pazarcı, Çiğdem Özkara, Naz Yeni
BACKGROUND AND OBJECTIVE: Auditory startle response (ASR) was normal in juvenile myoclonic epilepsy whereas it was suppressed in progressive myoclonic epilepsy. However, both groups were using valproic acid/Na valproate (VPA) in different doses. Therefore, we aimed to analyze whether VPA has an impact on ASR in a cohort of epilepsy. For this purpose, we included patients with epilepsy and analyzed ASR in patients who were using VPA. PATIENTS AND METHOD: We included 51 consecutive patients who had epilepsy and were using VPA between January 2014 and January 2016...
December 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29260591/subacute-encephalopathy-with-seizures-in-alcoholics-sesa-presenting-as-focal-nonconvulsive-status-epilepticus
#7
Peter W Kaplan, Andrew Billnitzer, José Luis Fernández-Torre
PURPOSE: To acquaint readers with the underrecognized subacute encephalopathy with seizures in chronic alcoholics (SESA) that has more recently been associated with different types of status epilepticus. METHODS: Case reports and review of the literature on SESA and nonconvulsive status epilepticus (NCSE). RESULTS: Two cases: one with alternating bifrontoparietal NCSE, and one with focal, confusional NCSE, with imaging and EEG correlates. CONCLUSION: Underrecognized SESA may present as NCSE with focal clinical, EEG and reversible diffusion-weighted MRI abnormalities, warranting expedited diagnosis and antiseizure treatment to minimize morbidity...
December 1, 2017: 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
#8
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...
December 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29243532/use-of-transcranial-direct-stimulation-in-the-treatment-of-negative-symptoms-of-schizophrenia
#9
Maria Pontillo, Floriana Costanzo, Deny Menghini, Roberto Averna, Ornella Santonastaso, Maria Cristina Tata, Stefano Vicari
Schizophrenia is a debilitating disease that affects approximately 1% of the population. Negative symptoms are among the major determinants of the functional impairment and a significant proportion of patients with negative symptoms will continue to experience these symptoms despite antipsychotic medications. There are promising results in the application of brain stimulation, particularly transcranial direct current stimulation (tDCS), for the reduction of negative symptoms of schizophrenia. However, findings are still controversial...
January 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29243531/impact-of-reward-and-loss-anticipation-on-cognitive-control-an-event-related-potential-study-in-subjects-with-schizophrenia-and-healthy-controls
#10
Annarita Vignapiano, Armida Mucci, Eleonora Merlotti, Giulia Maria Giordano, Antonella Amodio, Davide Palumbo, Silvana Galderisi
INTRODUCTION: Deficits of cognitive functions and motivation are core aspects of schizophrenia. The interaction of these deficits might contribute to impair the ability to flexibly adjust behavior in accordance with one's intentions and goals. Many studies have focused on the anterior N2 as a correlate of cognitive control based on motivational value. AIMS: Given the key role of motivation impairment in schizophrenia as a predictor of functional outcome, we aimed to study the impact of reward- and avoidance-based motivation on cognitive control using N2...
January 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29243530/electrophysiological-markers-of-motivation-in-psychosis
#11
Kazuki Sueyoshi, Tomiki Sumiyoshi
Motivation is associated with electrophysiological markers, such as awake state delta oscillation and frontal alpha asymmetry, as well as event-related potentials, such as error-related negativity, feedback-related negativity, and prepulse inhibition. These indicators provide an objective measure of motivational deficits in psychiatric conditions, and response to treatment. Also, these modalities of brain activities are drawing attention as a target of neurofeedback training. The aim of this article is to provide a brief overview on electrophysiological findings relevant to the understanding of the mechanisms underlying impaired motivation in psychiatric disorders and clinical practice...
January 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29243529/avolition-apathy-and-white-matter-connectivity-in-schizophrenia-reduced-fractional-anisotropy-between-amygdala-and-insular-cortex
#12
Antonella Amodio, Mario Quarantelli, Armida Mucci, Anna Prinster, Andrea Soricelli, Annarita Vignapiano, Giulia Maria Giordano, Eleonora Merlotti, Alessia Nicita, Silvana Galderisi
The avolition/apathy domain of negative symptoms includes motivation- and pleasure-related impairments. In people with schizophrenia, structural and functional abnormalities were reported in key regions within the motivational reward system, including ventral-tegmental area (VTA), striatum (especially at the level of the nucleus accumbens, NAcc), orbitofrontal cortex (OFC), as well as amygdala (Amy) and insular cortex (IC). However, the association of the reported abnormalities with avoliton-apathy is still controversial...
January 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29243528/electrophysiological-and-neuroimaging-research-on-negative-symptoms-future-challenges
#13
Armida Mucci, Alp Üçok, Mette Ødegaard Nielsen
No abstract text is available yet for this article.
January 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29243527/the-neural-correlates-of-negative-symptoms-in-schizophrenia-examples-from-mri-literature
#14
Lynn Mørch-Johnsen, Ingrid Agartz, Jimmy Jensen
Negative symptoms of schizophrenia have a negative impact on psychosocial functioning and disease outcome. It is therefore important to investigate the pathophysiology underlying negative symptoms as this may aid the development of better treatment. In the current article, examples from studies investigating neural correlates of negative symptoms in schizophrenia are given. Investigations using both structural and functional magnetic resonance imaging are presented at different levels of symptomatology descriptions, from the more heterogenous construct of negative symptoms to more single discrete symptoms...
January 2018: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29243526/relationship-between-persistent-negative-symptoms-and-findings-of-neurocognition-and-neuroimaging-in-schizophrenia
#15
Ezgi İnce, Alp Üçok
Negative symptoms are defined as loss or reduction of otherwise present behaviors or functions in illness situation, and they have constituted an important aspect of schizophrenia. Although negative symptoms have usually been considered as a single entity, neurobiological investigations yielded discrepant results. To overcome challenges that derive from this discrepancy, researchers have proposed several approaches to structure negative symptoms into more homogenous constructs. Concept of persistent negative symptoms (PNS) is one of the proposed approaches, and includes both primary and secondary negative symptoms that persist after adequate treatment...
January 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
#16
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...
November 1, 2017: 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
#17
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...
November 1, 2017: 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
#18
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...
November 1, 2017: 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
#19
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...
November 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/29145751/negative-symptoms-and-reward-disturbances-in-schizophrenia-before-and-after-antipsychotic-monotherapy
#20
Mette Ødegaard Nielsen, Egill Rostrup, Brian Villumsen Broberg, Sanne Wulff, Birte Glenthøj
BACKGROUND: Negative symptoms (NS) are a central part of the symptomatology of schizophrenia, which is highly correlated to the functional outcome. Disturbances of the brain reward system are suggested to be central in the pathogenesis of NS by decreasing motivation and hedonic experiences. In this study, we compared reward-related brain activity in patients improving and not improving in NS after treatment with amisulpride. METHODS: Thirty-nine antipsychotic-naive patients and 49 healthy controls completed functional magnetic resonance imaging with a modified monetary incentive delay task...
November 1, 2017: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
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