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https://www.readbyqxmd.com/read/28922360/comparison-of-background-eeg-activity-of-different-groups-of-patients-with-idiopathic-epilepsy-using-shannon-spectral-entropy-and-cluster-based-permutation-statistical-testing
#1
Jose Antonio Urigüen, Begoña García-Zapirain, Julio Artieda, Jorge Iriarte, Miguel Valencia
Idiopathic epilepsy is characterized by generalized seizures with no apparent cause. One of its main problems is the lack of biomarkers to monitor the evolution of patients. The only tools they can use are limited to inspecting the amount of seizures during previous periods of time and assessing the existence of interictal discharges. As a result, there is a need for improving the tools to assist the diagnosis and follow up of these patients. The goal of the present study is to compare and find a way to differentiate between two groups of patients suffering from idiopathic epilepsy, one group that could be followed-up by means of specific electroencephalographic (EEG) signatures (intercritical activity present), and another one that could not due to the absence of these markers...
2017: PloS One
https://www.readbyqxmd.com/read/28919257/seizures-by-the-clock-temporal-patterns-of-psychogenic-nonepileptic-seizures
#2
Udaya Seneviratne, Erica Minato, Eldho Paul
We hypothesized that (1) the occurrence of psychogenic nonepileptic seizures (PNES) is modulated by the interaction between the 24-hour clock and the sleep-wake cycle and (2) the pattern of modulation in PNES differs from epileptic seizures (ES). We sought to test our hypotheses in a cohort of patients diagnosed with PNES or ES in the setting of an epilepsy monitoring unit (EMU). We retrospectively reviewed consecutive video-EEG (VEEG) recordings of patients who underwent monitoring at the EMU of a tertiary hospital...
September 11, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28918702/anterior-thalamic-nuclei-deep-brain-stimulation-reduces-disruption-of-the-blood-brain-barrier-albumin-extravasation-inflammation-and-apoptosis-in-kainic-acid-induced-epileptic-rats
#3
Ying-Chuan Chen, Guan-Yu Zhu, Xiu Wang, Lin Shi, Ting-Ting Du, De-Feng Liu, Yu-Ye Liu, Yin Jiang, Xin Zhang, Jian-Guo Zhang
Objective The therapeutic efficacy of anterior thalamic nuclei deep brain stimulation (ATN-DBS) against seizures has been largely accepted; however, the effects of ATN-DBS on disruption of the blood-brain barrier (BBB), albumin extravasation, inflammation and apoptosis still remain unclear. Methods Rats were distributed into four treatment groups: physiological saline (PS, N = 12), kainic acid (KA, N = 12), KA-sham-DBS (N = 12) and KA-DBS (N = 12). Seizures were monitored using video-electroencephalogram (EEG)...
September 18, 2017: Neurological Research
https://www.readbyqxmd.com/read/28917659/sonification-of-scalp-recorded-frequency-following-responses-ffrs-offers-improved-response-detection-over-conventional-statistical-metrics
#4
Gavin M Bidelman
BACKGROUND: The human frequency-following response (FFR) is a neurophonic potential used to examine the brain's encoding of complex sounds (e.g., speech) and monitor neuroplastic changes in auditory processing. Given the FFR's low amplitude (order of nanovolts), current conventions in literature recommend collecting several thousand trials to obtain a robust evoked response with adequate signal-to-noise ratio. NEW METHOD: By exploiting the spectrotemporal fidelity of the response, we examined whether auditory playbacks (i...
September 13, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28913167/ictal-conduction-aphasia-and-ictal-angular-gyrus-syndrome-as-rare-manifestations-of-epilepsy-the-importance-of-ictal-testing-during-video-eeg-monitoring
#5
Johann Philipp Zöllner, Anja Haag, Anke Hermsen, Sebastian Bauer, Friederike Stahl, Karina Wulf, Katja Menzler, Philipp S Reif, Marlies Wagner, Axel Pagenstecher, Ulrich Sure, Susanne Knake, Felix Rosenow, Adam Strzelczyk
The aim of these two case reports is to demonstrate that a predefined, structured, multimodal clinical bed-side testing during seizures in a long-term video-EEG monitoring setting facilitates diagnosis of complex neuropsychological syndromes. To the best of our knowledge, we present the first case of conduction aphasia as the sole ictal semiology, and a patient with focal seizures producing an angular gyrus syndrome in the speech dominant hemisphere. The relevance of diagnosing ictal aphasic and angular gyrus syndromes and localizing the symptomatogenic zone is discussed...
2017: Epilepsy & Behavior Case Reports
https://www.readbyqxmd.com/read/28910781/weighted-performance-metrics-for-automatic-neonatal-seizure-detection-using-multi-scored-eeg-data
#6
A H Ansari, P J Cherian, A Caicedo, K Jansen, A Dereymaeker, L De Wispelaere, C Dielman, J Vervisch, P Govaert, M De Vos, G Naulaers, S Van Huffel
In neonatal intensive care units, there is a need for around the clock monitoring of EEG, especially for recognizing seizures. An automated seizure detector with an acceptable performance can partly fill this need. In order to develop a detector, an extensive dataset labeled by experts is needed. However, accurately defining neonatal seizures on EEG is a challenge, especially when seizure discharges do not meet exact definitions of repetitiveness or evolution in amplitude and frequency. When several readers score seizures independently, disagreement can be high...
September 11, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28898244/neuroplace-categorizing-urban-places-according-to-mental-states
#7
Lulwah Al-Barrak, Eiman Kanjo, Eman M G Younis
Urban spaces have a great impact on how people's emotion and behaviour. There are number of factors that impact our brain responses to a space. This paper presents a novel urban place recommendation approach, that is based on modelling in-situ EEG data. The research investigations leverages on newly affordable Electroencephalogram (EEG) headsets, which has the capability to sense mental states such as meditation and attention levels. These emerging devices have been utilized in understanding how human brains are affected by the surrounding built environments and natural spaces...
2017: PloS One
https://www.readbyqxmd.com/read/28898173/utility-of-stereoelectroencephalography-in-children-with-dysembryoplastic-neuroepithelial-tumor-and-cortical-malformation
#8
Jun T Park, Guadalupe Fernandez Baca Vaca, Jennifer Avery, Jonathan P Miller
BACKGROUND: Uncontrolled seizures in children can contribute to irreversible cognitive impairment and developmental delay, in addition to placing them at risk for sudden unexplained death in epileptic patients (SUDEP). Since its introduction at Saint Ann Hospital in Paris in the 1960s, stereoelectroencephalography (SEEG) is increasingly being utilized at epilepsy centers in the United States as an invasive tool to help localize the seizure focus in drug-resistant focal epilepsy. INDICATIONS: Children with symptomatic epilepsy, commonly due to cortical dysplasia and dysembryoplastic neuroepithelial tumor (DNET), may benefit from SEEG investigation...
2017: Neurodiagnostic Journal
https://www.readbyqxmd.com/read/28893295/a-brain-computer-interface-driven-by-imagining-different-force-loads-on-a-single-hand-an-online-feasibility-study
#9
Kun Wang, Zhongpeng Wang, Yi Guo, Feng He, Hongzhi Qi, Minpeng Xu, Dong Ming
BACKGROUND: Motor imagery (MI) induced EEG patterns are widely used as control signals for brain-computer interfaces (BCIs). Kinetic and kinematic factors have been proved to be able to change EEG patterns during motor execution and motor imagery. However, to our knowledge, there is still no literature reporting an effective online MI-BCI using kinetic factor regulated EEG oscillations. This study proposed a novel MI-BCI paradigm in which users can online output multiple commands by imagining clenching their right hand with different force loads...
September 11, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28890688/metastability-of-neuronal-dynamics-during-general-anesthesia-time-for-a-change-in-our-assumptions
#10
Andrew E Hudson
There is strong evidence that anesthetics have stereotypical effects on brain state, so that a given anesthetic appears to have a signature in the electroencephalogram (EEG), which may vary with dose. This can be usefully interpreted as the anesthetic determining an attractor in the phase space of the brain. How brain activity shifts between these attractors in time remains understudied, as most studies implicitly assume a one-to-one relationship between drug dose and attractor features by assuming stationarity over the analysis interval and analyzing data segments of several minutes in length...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28883745/review-of-devices-used-in-neuromuscular-electrical-stimulation-for-stroke-rehabilitation
#11
REVIEW
Kotaro Takeda, Genichi Tanino, Hiroyuki Miyasaka
Neuromuscular electrical stimulation (NMES), specifically functional electrical stimulation (FES) that compensates for voluntary motion, and therapeutic electrical stimulation (TES) aimed at muscle strengthening and recovery from paralysis are widely used in stroke rehabilitation. The electrical stimulation of muscle contraction should be synchronized with intended motion to restore paralysis. Therefore, NMES devices, which monitor electromyogram (EMG) or electroencephalogram (EEG) changes with motor intention and use them as a trigger, have been developed...
2017: Medical Devices: Evidence and Research
https://www.readbyqxmd.com/read/28878632/the-influence-of-regional-distribution-and-pharmacologic-specificity-of-gabaar-subtype-expression-on-anesthesia-and-emergence
#12
REVIEW
Iris Speigel, Edyta K Bichler, Paul S García
Anesthetics produce unconsciousness by modulating ion channels that control neuronal excitability. Research has shown that specific GABAA receptor (GABAAR) subtypes in particular regions of the central nervous system contribute to different hyperpolarizing conductances, and behaviorally to distinct components of the anesthetized state. The expression of these receptors on the neuron cell surface, and thus the strength of inhibitory neurotransmission, is dynamically regulated by intracellular trafficking mechanisms...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28873072/amplitude-integrated-eeg-and-brain-sparing-in-preterm-small-for-gestational-age-infants
#13
Isabel Benavente-Fernández, Simón P Lubián-López, Pamela Zafra-Rodríguez, Almudena Alonso-Ojembarrena, Antonio Segado-Arenas, Alfonso M Lechuga-Sancho
PURPOSE: Preterm small-for-gestational-age (SGA) infants are at risk for a high mortality rate and impaired cognitive development. Only a few studies have focused on amplitude-integrated EEG (aEEG) in preterm SGA infants. They have been shown to have a slower rate of brain maturation, but these findings have not consistently been related to neurodevelopmental outcomes. The aim of our study was to evaluate early aEEG monitoring in SGA compared with adequate-for-gestational-age preterms...
September 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28870854/opposite-effects-of-binge-drinking-on-consciously-vs-subliminally-induced-cognitive-conflicts
#14
Ann-Kathrin Stock, Nicole Wolff, Christian Beste
Binge-drinking is very prevalent and potentially harmful, yet very little is known about the specificity of its effects on behavior and the underlying neurophysiologic mechanisms. While it is generally accepted that alcohol impairs top-down cognitive control and conflict monitoring, it has remained unclear whether this also applies to subliminally triggered conflicts, as alcohol may not impair automated processes to the same extent. To investigate this, we used a within-subjects design in a sample of n = 22 healthy young male subjects who performed a complex response conflict paradigm while an EEG was recorded...
September 1, 2017: NeuroImage
https://www.readbyqxmd.com/read/28868902/differences-between-sleep-logs-and-actigraphy-combined-with-electroencephalography-in-adults-with-sleep-disturbances
#15
En-Ting Chang, Chiung-Yu Huang, Hui-Ling Lai
BACKGROUND: Actigraphy plus single-channel electroencephalography (EEG) has a high agreement with polysomnography and is considered a simple method for monitoring sleep at home. No studies, however, have evaluated its agreement with sleep logs. PURPOSE: A sleep log was compared to a single-channel EEG in adults with sleep disturbances. The determinants of the agreement between the two recording methods were explored. METHOD: This prospective comparison substudy included 71 participants aged 22-67 years sampled from a previous study of nonpharmacological therapy for sleep disturbances...
January 1, 2017: Biological Research for Nursing
https://www.readbyqxmd.com/read/28868196/novel-approach-to-continuous-neurophysiological-monitoring-during-surgery-of-peripheral-nerve-tumors
#16
Ángel Saponaro-González, Pedro Javier Pérez-Lorensu
BACKGROUND: Intraoperative neurophysiological monitoring (IONM) with nerve action potential (NAP) can be useful during peripheral nerve surgery. However, current methodologies are not optimized for continuous recording of the NAP. The use of newer electrodes may make it possible to more conveniently obtain continuous recordings of the NAP during surgery. METHODS: After localizing the nerve of interest and dissecting it from the adjacent soft tissue, two APS(®) (Automatic Periodic Stimulation) electrodes, originally designed for stimulation of the vagus nerve during thyroid surgery, are placed on the nerve on either sides of the tumor for stimulation and recording using two subdermal electroencephalogram (EEG) needles as anode and reference, respectively...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28867568/psychogenic-nonepileptic-seizures-in-patients-with-surgically-treated-temporal-lobe-epilepsy-presurgical-and-de-novo-postsurgical-occurrence
#17
Karina A González Otárula, Yee-Leng Tan, François Dubeau, José A Correa, Edward Chang, Jeffery A Hall, Robert C Knowlton, Eliane Kobayashi
Whether occurring before or after an epilepsy surgery, psychogenic nonepileptic seizures (PNES) impact treatment options and quality of life of patients with epilepsy. We investigated the frequency of pre- and postsurgical PNES, and the postsurgical Engel and psychiatric outcomes in patients with drug-resistant temporal lobe epilepsy (TLE). We reviewed 278 patients with mean age at surgery of 37.1±12.4years. Postsurgical follow-up information was available in 220 patients, with average follow-up of 4years...
August 31, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28867037/-place-of-eeg-in-the-management-of-arterial-ischemic-stroke-newborn
#18
S Nguyen The Tich
The EEG has a key role in the management of neonatal seizures, which are the typical mode of revelation of neonatal ischemic stroke. The EEG should be started as soon as possible in case of suspected seizure. Some EEG features are evocative of neonatal stroke, typically asymmetry of background activity with the presence of focal spikes and focal seizures. The EEG should be prolonged and always associated with a video as pauci-symptomatic or subclinical seizures are frequent, including some status epilepticus...
September 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28863321/the-role-of-necroptosis-in-status-epilepticus-induced-brain-injury-in-juvenile-rats
#19
Qianyun Cai, Jing Gan, Rong Luo, Yi Qu, Shiping Li, Chaomin Wan, Dezhi Mu
PURPOSE: To study the role of necroptosis in status epilepticus (SE)-induced injury in the developing brain and the possible associations of necroptosis with epileptogenesis and cognitive dysfunction. METHODS: The lithium-pilocarpine epilepsy model was reproduced in male rats at postnatal day 25. Propidium iodide (PI) staining was used to detect cell death after SE. Transmission electron microscopy (TEM) was performed to observe morphological changes in injured neurons...
August 29, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28863146/involvement-of-the-anterior-cingulate-cortex-in-time-based-prospective-memory-task-monitoring-an-eeg-analysis-of-brain-sources-using-independent-component-and-measure-projection-analysis
#20
Gabriela Cruz, Pablo Burgos, Kerry Kilborn, Jonathan J Evans
OBJECTIVE: Time-based prospective memory (PM), remembering to do something at a particular moment in the future, is considered to depend upon self-initiated strategic monitoring, involving a retrieval mode (sustained maintenance of the intention) plus target checking (intermittent time checks). The present experiment was designed to explore what brain regions and brain activity are associated with these components of strategic monitoring in time-based PM tasks. METHOD: 24 participants were asked to reset a clock every four minutes, while performing a foreground ongoing word categorisation task...
2017: PloS One
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