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Quantitative eeg

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https://www.readbyqxmd.com/read/28817568/an-optimal-strategy-for-epilepsy-surgery-disruption-of-the-rich-club
#1
Marinho A Lopes, Mark P Richardson, Eugenio Abela, Christian Rummel, Kaspar Schindler, Marc Goodfellow, John R Terry
Surgery is a therapeutic option for people with epilepsy whose seizures are not controlled by anti-epilepsy drugs. In pre-surgical planning, an array of data modalities, often including intra-cranial EEG, is used in an attempt to map regions of the brain thought to be crucial for the generation of seizures. These regions are then resected with the hope that the individual is rendered seizure free as a consequence. However, post-operative seizure freedom is currently sub-optimal, suggesting that the pre-surgical assessment may be improved by taking advantage of a mechanistic understanding of seizure generation in large brain networks...
August 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28807062/neuropsychiatric-characteristics-of-antiterrorist-operation-combatants-in-the-donbass-ukraine
#2
Konstantin N Loganovsky, Natalia A Zdanevich, Marina V Gresko, Donatella Marazziti, Tatiana K Loganovskaja
OBJECTIVE: The present paper aimed to explore the neuropsychiatric characteristics of the antiterrorism (ATO) combatants in the Donets Basin (Donbass) and to propose therapeutic strategies for managing their mental healthcare. METHODS: A total of 54 ATO combatants were included in our study and compared with four groups of subjects exposed to other emergencies, including the Chernobyl disaster and the war in Afghanistan. The neuropsychiatric features were assessed through psychopathological assessments, neurological examinations, and quantitative electroencephalography (qEEG)...
August 15, 2017: CNS Spectrums
https://www.readbyqxmd.com/read/28804453/delta-power-is-higher-and-more-symmetrical-in-ischemic-stroke-patients-with-cortical-involvement
#3
Chiara Fanciullacci, Federica Bertolucci, Giuseppe Lamola, Alessandro Panarese, Fiorenzo Artoni, Silvestro Micera, Bruno Rossi, Carmelo Chisari
A brain injury resulting from unilateral stroke critically alters brain functionality and the complex balance within the cortical activity. Such modifications may critically depend on lesion location and cortical involvement. Indeed, recent findings pointed out the necessity of applying a stratification based on lesion location when investigating inter-hemispheric balance in stroke. Here, we tested whether cortical involvement could imply differences in band-specific activity and brain symmetry in post stroke patients with cortico-subcortical and subcortical strokes...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28800613/ongoing-slow-oscillatory-phase-modulates-speech-intelligibility-in-cooperation-with-motor-cortical-activity
#4
Takayuki Onojima, Keiichi Kitajo, Hiroaki Mizuhara
Neural oscillation is attracting attention as an underlying mechanism for speech recognition. Speech intelligibility is enhanced by the synchronization of speech rhythms and slow neural oscillation, which is typically observed as human scalp electroencephalography (EEG). In addition to the effect of neural oscillation, it has been proposed that speech recognition is enhanced by the identification of a speaker's motor signals, which are used for speech production. To verify the relationship between the effect of neural oscillation and motor cortical activity, we measured scalp EEG, and simultaneous EEG and functional magnetic resonance imaging (fMRI) during a speech recognition task in which participants were required to recognize spoken words embedded in noise sound...
2017: PloS One
https://www.readbyqxmd.com/read/28776544/quantitative-evaluation-of-pain-with-pain-index-extracted-from-electroencephalogram
#5
Jian-Xiong An, Yong Wang, Doris K Cope, John P Williams
BACKGROUND: The current pain assessment methods are strongly subjective and easily affected by outside influences, and there is an urgent need to develop a reliable objective and quantitative pain-monitoring indicator. The aim of this study was to evaluate the feasibility of using Pain index (Pi) to assess pain symptoms in pain patients. METHODS: Subjects were enrolled from patients seeking treatment at Pain Medicine Center of China Medical University Aviation General Hospital from October 2015 to December 2016, such as postherpetic neuralgia, spinal cord injury, femoral head necrosis, lumbar disc herniation, trigeminal neuralgia, complex regional pain syndrome, perineal pain, phantom limb pain, etc...
August 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28770364/inter-study-and-inter-individual-consistency-and-variability-of-eeg-erp-microstate-sequences-in-referential-word-production
#6
Marina Laganaro
Periods of stable global electric field at scalp unfolding during a cognitive task can be linked to brain processes and are therefore well suited to investigate simultaneously qualitative and quantitative differences across conditions or populations of interest. The electrophysiological event-related (ERP) spatio-temporal dynamic has been repetitively investigated in referential word production, but the different designs, settings and analyses do not allow to conclude on the reliability of the microstate sequences across studies and individuals...
August 2, 2017: Brain Topography
https://www.readbyqxmd.com/read/28758313/altered-theta-oscillations-in-resting-eeg-of-fibromyalgia-syndrome-patients
#7
N Fallon, Y Chiu, T Nurmikko, A Stancak
BACKGROUND: Fibromyalgia syndrome (FM) is a chronic pain disorder characterized by widespread pain, sleep disturbance, fatigue and cognitive/affective symptoms. Functional imaging studies have revealed that FM and other chronic pain syndromes can affect resting brain activity. This study utilized electroencephalographic (EEG) recordings to investigate the relative power of ongoing oscillatory activity in the resting brain. METHODS: A 64-channel EEG was recorded at rest in 19 female FM patients and 18 healthy, age-matched, control subjects...
July 31, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28757110/quantitative-eeg-findings-and-response-to-treatment-with-antiepileptic-medications-in-children-with-epilepsy
#8
Chen-Sen Ouyang, Ching-Tai Chiang, Rei-Cheng Yang, Rong-Ching Wu, Hui-Chuan Wu, Lung-Chang Lin
BACKGROUND: Epilepsy is a common chronic disorder in pediatric neurology. Nowadays, a variety of antiepileptic drugs (AEDs) are available. A scientific method designed to evaluate the effectiveness of AEDs in the early stage of treatment has not been reported. PURPOSE: In this study, we try to use quantitative EEG (QEEG) analysis as a biomarker to evaluate therapeutic effectiveness. METHODS: 20 epileptic children were enrolled in this study...
July 27, 2017: Brain & Development
https://www.readbyqxmd.com/read/28750884/predictive-value-of-eeg-in-postanoxic-encephalopathy-a-quantitative-model-based-approach
#9
Evdokia Efthymiou, Roland Renzel, Christian R Baumann, Rositsa Poryazova, Lukas L Imbach
INTRODUCTION: The majority of comatose patients after cardiac arrest do not regain consciousness due to severe postanoxic encephalopathy. Early and accurate outcome prediction is therefore essential in determining further therapeutic interventions. The electroencephalogram is a standardized and commonly available tool used to estimate prognosis in postanoxic patients. The identification of pathological EEG patterns with poor prognosis relies however primarily on visual EEG scoring by experts...
July 24, 2017: Resuscitation
https://www.readbyqxmd.com/read/28746840/quantitative-assessments-of-extracellular-eeg-to-classify-specific-features-of-main-phases-of-seizure-acquisition-based-on-kindling-model-in-rat
#10
Mostafa Jalilifar, Ali Yadollahpour, Ahmad Ali Moazedi, Zohreh Ghotbeddin
OBJECTIVE: Quantitative assessments of extracellular EEG to identify specific features of three main phases of seizure acquisition based on kindling model in Rat. METHODS: Male rats were divided into 2 groups including kindled (n=10) and sham (n=7) and respectively underwent an amygdala rapid kindling and placebo kindling. EEG signals in stages 1-2 (initial seizure stages (ISSs)), 3 (localized seizure stage (LSS)), and 4-5 generalized seizure stages (GSSs) were divided into 5 bands: delta (0-4Hz), theta (4-8Hz), alpha (8-12Hz), beta (12-28Hz), and gamma (28-40Hz)...
July 23, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28732342/scope-mtl-a-non-invasive-tool-for-identifying-and-lateralizing-mesial-temporal-lobe-seizures-prior-to-scalp-eeg-ictal-onset
#11
Alice D Lam, Douglas Maus, Sahar F Zafar, Andrew J Cole, Sydney S Cash
OBJECTIVE: In mesial temporal lobe (mTL) epilepsy, seizure onset can precede the appearance of a scalp EEG ictal pattern by many seconds. The ability to identify this early, occult mTL seizure activity could improve lateralization and localization of mTL seizures on scalp EEG. METHODS: Using scalp EEG spectral features and machine learning approaches on a dataset of combined scalp EEG and foramen ovale electrode recordings in patients with mTL epilepsy, we developed an algorithm, SCOPE-mTL, to detect and lateralize early, occult mTL seizure activity, prior to the appearance of a scalp EEG ictal pattern...
July 1, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28729833/altered-neuronal-activity-topography-markers-in-the-elderly-with-increased-atherosclerosis
#12
Takashi Shibata, Toshimitu Musha, Yukio Kosugi, Michiya Kubo, Yukio Horie, Naoya Kuwayama, Satoshi Kuroda, Karin Hayashi, Yohei Kobayashi, Mieko Tanaka, Haruyasu Matsuzaki, Kiyotaka Nemoto, Takashi Asada
Background: Previously, we reported on vascular cognitive impairment (VCI) templates, consisting of patients with VCI associated with carotid stenosis (>60%) using a quantitative electroencephalographic (EEG) technique called neuronal activity topography (NAT). Here using the VCI templates, we investigated the hypothesis that internal carotid artery-intima-media thickness (ICA-IMT) is associated with EEG spectrum intensity (sNAT) and spectrum steepness (vNAT). Methods: A total of 221 community-dwelling elderly subjects were recruited...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28721936/assessing-quantitative-eeg-spectrograms-to-identify-non-epileptic-events
#13
Ajay Goenka, Alexis Boro, Elissa Yozawitz
To evaluate the sensitivity and specificity of quantitative EEG (QEEG) spectrograms in order to distinguish epileptic from non-epileptic events. Seventeen patients with paroxysmal non-epileptic events, captured during EEG monitoring, were retrospectively assessed using QEEG spectrograms. These patients were compared to a control group of 13 consecutive patients (ages 25-60 years) with epileptic seizures of similar semiology. Assessment of raw EEG was employed as the gold standard against which epileptic and non-epileptic events were validated...
July 19, 2017: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/28713043/auditory-discrimination-improvement-predicts-awakening-of-postanoxic-comatose-patients-treated-with-targeted-temperature-management-at-36%C3%A2-c
#14
Christian Pfeiffer, Nathalie Ata Nguepno Nguissi, Magali Chytiris, Phanie Bidlingmeyer, Matthias Haenggi, Rebekka Kurmann, Frédéric Zubler, Mauro Oddo, Andrea O Rossetti, Marzia De Lucia
BACKGROUND: Outcome prognostication in postanoxic comatose patients is more accurate in predicting poor than good recovery. Using electroencephalography recordings in patients treated with targeted temperature management at 33°C (TTM 33), we have previously shown that improvement in auditory discrimination over the first days of coma predicted awakening. Given the increased application of a 36°C temperature target (TTM 36), here we aimed at validating the predictive value of auditory discrimination in the TTM 36 setting...
September 2017: Resuscitation
https://www.readbyqxmd.com/read/28699778/neurofeedback-as-an-adjunct-therapy-for-treatment-of-chronic-posttraumatic-stress-disorder-related-to-refugee-trauma-and-torture-experiences-two-case-studies
#15
Mirjana Askovic, Anna J Watters, Jorge Aroche, Anthony W F Harris
OBJECTIVE: The objective of this study was to describe the use of neurofeedback for refugee-related chronic posttraumatic stress disorder (PTSD) in two case studies. METHODS: We describe the assessment and application of neurofeedback integrated into the treatment of two clients with chronic PTSD. We include details of our treatment schedule, symptoms and quantitative electrophysiological data for each case. Results All clients achieved significant reduction in symptoms of PTSD and improvement in daily functioning post-neurofeedback therapy...
August 2017: Australasian Psychiatry: Bulletin of Royal Australian and New Zealand College of Psychiatrists
https://www.readbyqxmd.com/read/28690583/correlating-interictal-spikes-with-sigma-and-delta-dynamics-during-non-rapid-eye-movement-sleep
#16
Frédéric Zubler, Annalisa Rubino, Giorgio Lo Russo, Kaspar Schindler, Lino Nobili
Interictal spikes (IS) are one of the major hallmarks of epilepsy. Understanding the factors promoting or suppressing IS would increase our comprehension of epilepsy and possibly open new avenues for therapy. Sleep strongly influences epileptic activity, and the modulatory effects of the different sleep stages on IS have been studied for decades. However, several aspects are still disputed, in particular the role of sleep spindles and slow waves in the activation of IS during Non-REM sleep. Here, we correlate the rate of IS with quantitative measures derived from stereo-EEG during one Non-REM cycle in 10 patients suffering from drug-resistant epilepsy due to type 2 focal cortical dysplasia...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28677591/a-realistic-multimodal-modeling-approach-for-the-evaluation-of-distributed-source-analysis-application-to-sloreta
#17
Delphine Cosandier-Rimélé, Georgia Ramantani, Josef Zentner, Andreas Schulze-Bonhage, Matthias Duempelmann
OBJECTIVE: Electrical Source Localization (ESL) deriving from scalp EEG and, in recent years, from intracranial EEG (iEEG), is an established method in epilepsy surgery workup. We aimed to validate the distributed ESL derived from scalp EEG and iEEG, particularly regarding the spatial extent of the source, using a realistic epileptic spike activity simulator. APPROACH: ESL was applied to the averaged scalp EEG and iEEG spikes of two patients with drug-resistant structural epilepsy...
July 5, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28663069/meditation-is-associated-with-increased-brain-network-integration
#18
Remko van Lutterveld, Edwin van Dellen, Prasanta Pal, Hua Yang, Cornelis Jan Stam, Judson Brewer
INTRODUCTION: This study aims to identify novel quantitative EEG measures associated with mindfulness meditation. As there is some evidence that meditation is associated with higher integration of brain networks, we focused on EEG measures of network integration. METHODS: Sixteen novice meditators and sixteen experienced meditators participated in the study. Novice meditators performed a basic meditation practice that supported effortless awareness, which is an important quality of experience related to mindfulness practices, while their EEG was recorded...
June 27, 2017: NeuroImage
https://www.readbyqxmd.com/read/28654635/two-different-mechanisms-support-selective-attention-at-different-phases-of-training
#19
Sirawaj Itthipuripat, Kexin Cha, Anna Byers, John T Serences
Selective attention supports the prioritized processing of relevant sensory information to facilitate goal-directed behavior. Studies in human subjects demonstrate that attentional gain of cortical responses can sufficiently account for attention-related improvements in behavior. On the other hand, studies using highly trained nonhuman primates suggest that reductions in neural noise can better explain attentional facilitation of behavior. Given the importance of selective information processing in nearly all domains of cognition, we sought to reconcile these competing accounts by testing the hypothesis that extensive behavioral training alters the neural mechanisms that support selective attention...
June 2017: PLoS Biology
https://www.readbyqxmd.com/read/28648714/evaluation-of-a-minimum-norm-based-beamforming-technique-sloreta-for-reducing-tonic-muscle-contamination-of-eeg-at-sensor-level
#20
Azin S Janani, Tyler S Grummett, Trent W Lewis, Sean P Fitzgibbon, Emma M Whitham, Dylan DelosAngeles, Hanieh Bakhshayesh, John O Willoughby, Kenneth J Pope
BACKGROUND: Cranial and cervical muscle activity (electromyogram, EMG) contaminates the surface electroencephalogram (EEG) from frequencies below 20 through to frequencies above 100Hz. It is not possible to have a reliable measure of cognitive tasks expressed in EEG at gamma-band frequencies until the muscle contamination is removed. NEW METHOD: In the present work, we introduce a new approach of using a minimum-norm based beamforming technique (sLORETA) to reduce tonic muscle contamination at sensor level...
June 23, 2017: Journal of Neuroscience Methods
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