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Quantitative eeg

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https://www.readbyqxmd.com/read/28431290/predicting-success-of-vagus-nerve-stimulation-vns-from-eeg-symmetry
#1
REVIEW
Janneke Hilderink, Marleen C Tjepkema-Cloostermans, Anita Geertsema, Janita Glastra-Zwiers, Cecile C de Vos
PURPOSE: Vagus nerve stimulation (VNS) has shown to be an effective treatment for drug resistant epilepsy, with achieving more than 50% seizure reduction in one third of the treated patients. In order to predict which patients will profit from VNS, we previously found that a low pairwise derived Brain Symmetry Index (pdBSI) could potentially predict good responders to VNS treatment. These findings however have to be validated before they can be generalized. METHODS: 39 patients (age 18-68 years) with medically intractable epilepsy who were referred for an implanted VNS system were included...
April 4, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28430695/cerebral-recovery-index-reliable-help-for-prediction-of-neurologic-outcome-after-cardiac-arrest
#2
Marleen C Tjepkema-Cloostermans, Jeannette Hofmeijer, Albertus Beishuizen, Harold W Hom, Michiel J Blans, Frank H Bosch, Michel J A M van Putten
OBJECTIVE: Early electroencephalography measures contribute to outcome prediction of comatose patients after cardiac arrest. We present predictive values of a new cerebral recovery index, based on a combination of quantitative electroencephalography measures, extracted every hour, and combined by the use of a random forest classifier. DESIGN: Prospective observational cohort study. SETTING: Medical ICU of two large teaching hospitals in the Netherlands...
April 20, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28414968/investigating-the-correlation-between-short-term-effectiveness-of-vns-therapy-in-reducing-the-severity-of-seizures-and-long-term-responsiveness
#3
Maryam Ravan
VNS (Vagus Nerve Stimulation) Therapy(®) is an adjunctive therapy for patients with medically refractory epilepsy. The primary metric used to assess response to any treatment for epilepsy is seizure frequency reduction as measured using seizure diaries. In addition to seizure frequency, reduction in seizure severity is clinically meaningful to patients and can be measured objectively. Analysis of electro-encephalographic (EEG) signals has revealed that seizures are accompanied by spatial synchronization of EEG electrodes that may persist for several minutes after the seizure...
April 11, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28412953/quantification-of-task-dependent-cortical-activation-evoked-by-robotic-continuous-wrist-joint-manipulation-in-chronic-hemiparetic-stroke
#4
Martijn P Vlaar, Teodoro Solis-Escalante, Julius P A Dewald, Erwin E H van Wegen, Alfred C Schouten, Gert Kwakkel, Frans C T van der Helm
BACKGROUND: Cortical damage after stroke can drastically impair sensory and motor function of the upper limb, affecting the execution of activities of daily living and quality of life. Motor impairment after stroke has been thoroughly studied, however sensory impairment and its relation to movement control has received less attention. Integrity of the somatosensory system is essential for feedback control of human movement, and compromised integrity due to stroke has been linked to sensory impairment...
April 17, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28392169/nonlinear-dynamical-analysis-of-sleep-electroencephalography-using-fractal-and-entropy-approaches
#5
REVIEW
Yan Ma, Wenbin Shi, Chung-Kang Peng, Albert C Yang
The analysis of electroencephalography (EEG) recordings has attracted increasing interest in recent decades and provides the pivotal scientific tool for researchers to quantitatively study brain activity during sleep, and has extended our knowledge of the fundamental mechanisms of sleep physiology. Conventional EEG analyses are mostly based on Fourier transform technique which assumes linearity and stationarity of the signal being analyzed. However, due to the complex and dynamical characteristics of EEG, nonlinear approaches are more appropriate for assessing the intrinsic dynamics of EEG and exploring the physiological mechanisms of brain activity during sleep...
January 29, 2017: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/28386574/quantitative-electroencephalograms-and-neuro-optometry-a-case-study-that-explores-changes-in-electrophysiology-while-wearing-therapeutic-eyeglasses
#6
Deborah Zelinsky, Corey Feinberg
The brain is equipped with a complex system for processing sensory information, including retinal circuitry comprising part of the central nervous system. Retinal stimulation can influence brain function via customized eyeglasses at both subcortical and cortical levels. We investigated cortical effects from wearing therapeutic eyeglasses, hypothesizing that they can create measureable changes in electroencephalogram (EEG) tracings. A Z-Bell(SM) test was performed on a participant to select optimal lenses. An EEG measurement was recorded before and after the participant wore the eyeglasses...
January 2017: Neurophotonics
https://www.readbyqxmd.com/read/28386179/the-research-of-constructing-dynamic-cognition-model-based-on-brain-network
#7
Fang Chunying, Li Haifeng, Ma Lin
Estimating the functional interactions and connections between brain regions to corresponding process in cognitive, behavioral and psychiatric domains is a central pursuit for understanding the human connectome. Few studies have examined the effects of dynamic evolution on cognitive processing and brain activation using brain network model in scalp electroencephalography (EEG) data. Aim of this study was to investigate the brain functional connectivity and construct dynamic programing model from EEG data and to evaluate a possible correlation between topological characteristics of the brain connectivity and cognitive evolution processing...
March 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28385478/quantitative-electroencephalogram-measures-in-adult-obstructive-sleep-apnea-potential-biomarkers-of-neurobehavioural-functioning
#8
REVIEW
Angela L D'Rozario, Nathan E Cross, Andrew Vakulin, Delwyn J Bartlett, Keith K H Wong, David Wang, Ronald R Grunstein
Obstructive sleep apnea (OSA) results in significantly impaired cognitive functioning and increased daytime sleepiness in some patients leading to increased risk of motor vehicle and workplace accidents and reduced productivity. Clinicians often face difficulty in identifying which patients are at risk of neurobehavioural dysfunction due to wide inter-individual variability, and disparity between symptoms and conventional metrics of disease severity such as the apnea hypopnea index. Quantitative electroencephalogram (EEG) measures are determinants of awake neurobehavioural function in healthy subjects...
October 19, 2016: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/28375851/effects-of-force-load-muscle-fatigue-and-extremely-low-frequency-magnetic-stimulation-on-eeg-signals-during-side-arm-lateral-raise-task
#9
Ying Wang, Liu Cao, Dongmei Hao, Yao Rong, Lin Yang, Song Zhang, Fei Chen, Dingchang Zheng
The aim of this study was to quantitatively investigate the effects of force load, muscle fatigue and extremely low frequency (ELF) magnetic stimulation on electroencephalography (EEG) signal features during side arm lateral raise task. EEG signals were recorded by a BIOSEMI Active Two system with Pin-Type active-electrodes from 18 healthy subjects when they performed the right arm side lateral raise task (90 degrees away from the body) with three different loads (0kg, 1kg and 3 kg; their order was randomized among the subjects) on the forearm...
April 4, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28368080/-when-does-post-ictal-period-start-in-temporal-lobe-epilepsy-a-quantitative-eeg-perspective
#10
A Sanz-Garcia, L Vega-Zelaya, J Pastor, R G Sola, G J Ortega
INTRODUCTION: In partial seizures, from a clinical point of view or even from electroencephalography characterization of post-ictal period can be difficult. The spectral and complex network analysis could lead to a more accurate definition of its limits, as well as to a great understanding of the seizures. PATIENTS AND METHODS: Digital EEG recordings from scalp and foramen oval electrodes were used, 32 seizures, from 15 patients with drug-resistant mesial temporal lobe epilepsy (Engel I)...
April 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28366355/electrographic-seizures-during-the-early-postnatal-period-in-preterm-infants
#11
Rhodri O Lloyd, John M O'Toole, Elena Pavlidis, Peter M Filan, Geraldine B Boylan
OBJECTIVE: To investigate the frequency and characteristics of electrographic seizures in preterm infants in the early postnatal period. STUDY DESIGN: Infants <32 weeks gestational age (GA) (n = 120) were enrolled for continuous multichannel electroencephalography (EEG) recording initiated as soon as possible after birth and continued for approximately up to 72 hours of age. Electrographic seizures were identified visually, annotated, and analyzed. Quantitative descriptors of the temporal evolution of seizures, including total seizure burden, seizure duration, and maximum seizure burden, were calculated...
March 30, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28362398/automatic-detection-of-highly-organized-theta-oscillations-in-the-murine-eeg
#12
Ralf Müller, Anna Papazoglou, Julien Soos, Andreas Lundt, Carola Wormuth, Christina Henseler, Dan Ehninger, Karl Broich, Marco Weiergräber
Theta activity is generated in the septohippocampal system and can be recorded using deep intrahippocampal electrodes and implantable electroencephalography (EEG) radiotelemetry or tether system approaches. Pharmacologically, hippocampal theta is heterogeneous (see dualistic theory) and can be differentiated into type I and type II theta. These individual EEG subtypes are related to specific cognitive and behavioral states, such as arousal, exploration, learning and memory, higher integrative functions, etc...
March 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28348918/correlation-of-visuospatial-ability-and-eeg-slowing-in-patients-with-parkinson-s-disease
#13
Dominique Eichelberger, Pasquale Calabrese, Antonia Meyer, Menorca Chaturvedi, Florian Hatz, Peter Fuhr, Ute Gschwandtner
Background. Visuospatial dysfunction is among the first cognitive symptoms in Parkinson's disease (PD) and is often predictive for PD-dementia. Furthermore, cognitive status in PD-patients correlates with quantitative EEG. This cross-sectional study aimed to investigate the correlation between EEG slowing and visuospatial ability in nondemented PD-patients. Methods. Fifty-seven nondemented PD-patients (17 females/40 males) were evaluated with a comprehensive neuropsychological test battery and a high-resolution 256-channel EEG was recorded...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28340443/quantitative-eeg-abnormalities-in-major-depressive-disorder-with-basal-ganglia-stroke-with-lesions-in-different-hemispheres
#14
Chunfang Wang, Yuanyuan Chen, Ying Zhang, Jin Chen, Xiaojing Ding, Dong Ming, Jingang Du
BACKGROUND: This study aimed to examine the aberrant EEG oscillation in major depressive subjects with basal ganglia stroke with lesions in different hemispheres. METHODS: Resting EEG of 16 electrodes in 58 stroke subjects, 26 of whom had poststroke depression (13 with left-hemisphere lesion and 13 with right) and 32 of whom did not (18 with left lesion and 14 with right), was recorded to obtain spectral power analysis for several frequency bands. Multiple analysis of variance and receiver operating characteristic (ROC) curves were used to identify differences between poststroke depression (PSD) and poststroke non-depression (PSND), treating the different lesion hemispheres separately...
February 28, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28339635/the-impact-of-zonisamide-on-the-development-and-course-of-alcohol-dependence-in-rabbits-a-pharmaco-eeg-study
#15
Agata Krupa-Burtnik, Ewa Zwierzynska, Anna Kordala, Boguslawa Pietrzak
Aims: Zonisamide is a new anti-epileptic drug whose mechanism of action is associated with neurotransmission systems also involved in the pathogenesis of addiction. Recently, the role of memory processes and the hippocampus (Hp) is underlined in dependence. In our previous study, we determined that zonisamide decreases changes in hippocampal bioelectric activity induced by a single dose of ethanol. Methods: This study uses a pharmaco-EEG method to examine the impact of zonisamide on the development and course of alcohol dependence in rabbits...
February 17, 2017: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
https://www.readbyqxmd.com/read/28326122/preliminary-study-on-quantitative-sleep-eeg-characteristics-in-patients-with-schizophrenia
#16
Seong Min Oh, Yu Jin Lee, Jong Won Kim, Jae Won Choi, Do-Un Jeong
We used quantitative electroencephalography (EEG) spectral analysis to compare activity in the bilateral frontal, central, and occipital areas in nine patients with schizophrenia and ten healthy control subjects during standard nocturnal polysomnography. Patients with schizophrenia had longer sleep latency than controls. In N2 sleep, the patients had significantly lower 0.5-1 Hz power and higher theta power in the left frontal region, and higher beta power in the left occipital region than did control subjects...
March 2017: Psychiatry Investigation
https://www.readbyqxmd.com/read/28324998/prediction-of-the-outcome-in-cardiac-arrest-patients-undergoing-hypothermia-using-eeg-wavelet-entropy
#17
Hana Moshirvaziri, Nima Ramezan-Arab, Shadnaz Asgari
Cardiac arrest (CA) is the leading cause of death in the United States. Induction of hypothermia has been found to improve the functional recovery of CA patients after resuscitation. However, there is no clear guideline for the clinicians yet to determine the prognosis of the CA when patients are treated with hypothermia. The present work aimed at the development of a prognostic marker for the CA patients undergoing hypothermia. A quantitative measure of the complexity of Electroencephalogram (EEG) signals, called wavelet sub-band entropy, was employed to predict the patients' outcomes...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323720/neuroprognostication-after-cardiac-arrest-in-the-light-of-targeted-temperature-management
#18
Mauro Oddo, Hans Friberg
PURPOSE OF REVIEW: Delayed awakening after targeted temperature management (TTM) and sedation is frequent among cardiac arrest patients. Differentiating between prolonged coma and irreversible cerebral damage can be challenging, therefore the utilization of a multimodal approach is recommended by international guidelines. Here, we discuss indications and advantages/disadvantages of available modalities for coma prognostication and describe new tools to improve our accuracy for outcome prediction...
June 2017: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/28282552/periictal-activity-in-cooled-asphyxiated-neonates-with-seizures
#19
Philippe Major, Anne Lortie, Mathieu Dehaes, Gregory Anton Lodygensky, Anne Gallagher, Lionel Carmant, Ala Birca
PURPOSE: Seizures are common in critically ill neonates. Both seizures and antiepileptic treatments may lead to short term complications and worsen the outcomes. Predicting the risks of seizure reoccurrence could enable individual treatment regimens and better outcomes. We aimed to identify EEG signatures of seizure reoccurrence by investigating periictal electrographic features and spectral power characteristics in hypothermic neonates with hypoxic-ischemic encephalopathy (HIE) with or without reoccurrence of seizures on rewarming...
April 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28281852/the-patterns-of-eeg-changes-in-early-onset-parkinson-s-disease-patients
#20
Xuetao He, Yuhu Zhang, Jieling Chen, Chunge Xie, Rong Gan, Rong Yang, Limin Wang, Kun Nie, Lijuan Wang
The aim of this study was to investigate the patterns of brain activities changes in early-onset parkinson's disease(EOPD) patients and its relationship with the severity of disease and motor deterioration. Electroencephalography (EEG) was performed in a sample of 52 nondemented EOPD patients and 20 healthy controls with similar age. All patients underwent a battery to assess PD severity and motor deterioration. The EEG data were rated by visual and quantitative analyses with the Grant total EEG(GTE) score and NicoletOne Software...
March 10, 2017: International Journal of Neuroscience
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