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https://www.readbyqxmd.com/read/28929921/clinical-implications-of-interictal-epileptiform-discharges-in-cognitive-functioning-in-cec-syndrome-with-evolution-into-epileptic-encephalopathy
#1
Paolo Bonanni, Susanna Negrin, Lisa Antoniazzi, Martina Da Rold, Franco Fabbro, Anna Serafini
In epileptic encephalopathies (EE), interictal epileptiform discharges (IEDs) contribute to cognitive impairment. The EE process has been studied in a patient affected by epilepsy with occipital calcification and celiac disease (CEC syndrome) by combining the administration of brain area stimulus specific (visual and auditory) reaction times (RT) during continuous EEG monitoring with the off-line reconstruction of auditory and visual evoked potentials (EP). Visual RT and VEP were abnormal only if recorded concomitantly to the IEDs...
September 20, 2017: Neurocase
https://www.readbyqxmd.com/read/28929444/neurophysiological-approach-to-examining-knowledge-belief-in-the-prayer-of-an-untrained-person-a-case-study
#2
Mirjana Sovilj, Zoran Radičević, Ljiljana Jeličić, Miodrag Stokić, Vanja Nenadović, Miško Subotić
An adult female (22 years) of Christian orthodox religion was examined during the silent Lord's prayer, the most common, short prayer, with the aim of possible differentiation between belief and knowledge in her experience, analyzing the behavior of subgroups of theta and beta cerebral EEG rhythms, which occur through constant and occasional activation of cerebral regions. The participant was not trained in reading the prayer to herself or other people. EEG examination was performed by Nihon Kohden Corporation, EEG-1200-K Neurofax apparatus, in the monopolar longitudinal montage in the system of 10/20 electrodes aimed at determining the peak frequency value of each exploratory site...
September 19, 2017: Journal of Religion and Health
https://www.readbyqxmd.com/read/28926828/are-all-amplitude-integrated-electroencephalogram-systems-equal
#3
Tobias Werther, Monika Olischar, Gunnar Naulaers, Philipp Deindl, Katrin Klebermass-Schrehof, Nathan Stevenson
BACKGROUND: Filter and peak detection algorithms implemented in amplitude-integrated electroencephalogram (aEEG) systems are not standardized. New aEEG systems are continuously enriching the market and clinicians are faced with different aEEG devices whose tracings may vary. OBJECTIVES: The aim of this work was to determine the role of different aEEG systems on quantitative measurements of the aEEG. METHODS: In this observational study, a single-channel aEEG recording (Olympic CFM 6000) with corresponding EEG signal was obtained from 32 infants at a gestational age of 36-44 weeks...
September 20, 2017: Neonatology
https://www.readbyqxmd.com/read/28925800/investigation-of-attention-deficit-hyperactivity-disorder-adhd-sub-types-in-children-via-eeg-frequency-domain-analysis
#4
Ramazan Aldemir, Esra Demirci, Huseyin Per, Mehmet Canpolat, Sevgi Özmen, Mahmut Tokmakçı
This study aims to investigate the frequency domain effects and changes in Electroencephalographic (EEG) signals in children aged 7-12 years old who were diagnosed with Attention Deficit and Hyperactivity Disorder (ADHD) and which labelled subtypes of ADHD.The study's sample consisted of 20 healthy children and 20 ADHD children as control group. Of the 20 participants who were diagnosed with ADHD, 10 were classified as ADHD-I (inattentive subtype ADHD) and the other 10 were classified as ADHD-C (combined subtype ADHD)...
September 19, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28922287/pregabalin-toxicity-manifesting-as-reversible-encephalopathy-with-continuous-triphasic-waves-in-electroencephalogram
#5
Mihir Parekh, Gopal Krishna Dash, Isthiaque Ahamed
A 74-year-old man with peripheral neuropathy due to diabetes presented with deliberate ingestion of 450 mg of pregabalin (PBG) over a period of 8 hours followed by altered mental status. A bedside electroencephalogram was performed to rule out nonconvulsive status epilepticus, which showed continuous triphasic waves (TWs) with slow background activity. He recovered after 48 hours of stopping PBG, and his repeat electroencephalogram after 72 hours did not show any TWs. We present a rare case of PBG-induced TWs thereby highlighting the extent of the etiologic spectrum of TWs and discussing the literature related to this association...
September 2017: Clinical Neuropharmacology
https://www.readbyqxmd.com/read/28920893/a-functional-genetic-scheme-for-seizure-forecasting-in-canine-epilepsy
#6
E Bou Assi, D K Nguyen, S Rihana, M Sawan
OBJECTIVE: The objective of this work is the development of an accurate seizure forecasting algorithm that considers brain's functional connectivity for electrode selection. METHODS: We start by proposing Kmeans-directed transfer function, an adaptive functional connectivity method intended for seizure onset zone localization in bilateral intracranial EEG recordings. Electrodes identified as seizure activity sources and sinks are then used to implement a seizure-forecasting algorithm on long-term continuous recordings in dogs with naturallyoccurring epilepsy...
September 13, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28920892/computationally-efficient-algorithms-for-sparse-dynamic-solutions-to-the-eeg-source-localization-problem
#7
Elvira Pirondini, Behtash Babadi, Gabriel Obregon-Henao, Camilo Lamus, Wasim Q Malik, Matti S Hamalainen, Patrick L Purdon
OBJECTIVE: Electroencephalography (EEG) and magnetoencephalography (MEG) non-invasively record scalp electromagnetic fields generated by cerebral currents, revealing millisecond-level brain dynamics useful for neuroscience and clinical applications. Estimating the currents that generate these fields, i.e., source localization, is an ill-conditioned inverse problem. Solutions to this problem have focused on spatial continuity constraints, dynamic modeling, or sparsity constraints. The combination of these key ideas could offer significant performance improvements, but substantial computational costs pose a challenge for practical application of such approaches...
September 14, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28912704/reliability-of-eeg-measures-of-interaction-a-paradigm-shift-is-needed-to-fight-the-reproducibility-crisis
#8
Yvonne Höller, Andreas Uhl, Arne Bathke, Aljoscha Thomschewski, Kevin Butz, Raffaele Nardone, Jürgen Fell, Eugen Trinka
Measures of interaction (connectivity) of the EEG are at the forefront of current neuroscientific research. Unfortunately, test-retest reliability can be very low, depending on the measure and its estimation, the EEG-frequency of interest, the length of the signal, and the population under investigation. In addition, artifacts can hamper the continuity of the EEG signal, and in some clinical situations it is impractical to exclude artifacts. We aimed to examine factors that moderate test-retest reliability of measures of interaction...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28899742/icn_atlas-automated-description-and-quantification-of-functional-mri-activation-patterns-in-the-framework-of-intrinsic-connectivity-networks
#9
Lajos R Kozák, Louis André van Graan, Umair J Chaudhary, Ádám Szabó, Louis Lemieux
Generally, the interpretation of functional MRI (fMRI) activation maps continues to rely on assessing their relationship to anatomical structures, mostly in a qualitative and often subjective way. Recently, the existence of persistent and stable brain networks of functional nature has been revealed; in particular these so-called intrinsic connectivity networks (ICNs) appear to link patterns of resting state and task-related state connectivity. These networks provide an opportunity of functionally-derived description and interpretation of fMRI maps, that may be especially important in cases where the maps are predominantly task-unrelated, such as studies of spontaneous brain activity e...
September 9, 2017: NeuroImage
https://www.readbyqxmd.com/read/28886073/outcomes-of-patients-with-altered-level-of-consciousness-and-abnormal-electroencephalogram-a-retrospective-cohort-study
#10
Paula Rodrigues Sanches, Thiago Domingos Corrêa, Taissa Ferrari-Marinho, Pedro Vicente Ferreira Naves, Carol Ladeia-Frota, Luís Otávio Caboclo
INTRODUCTION: Nonconvulsive seizures (NCS) are frequent in hospitalized patients and may further aggravate injury in the already damaged brain, potentially worsening outcomes in encephalopathic patients. Therefore, both early seizure recognition and treatment have been advocated to prevent further neurological damage. OBJECTIVE: Evaluate the main EEG patterns seen in patients with impaired consciousness and address the effect of treatment with antiepileptic drugs (AEDs), continuous intravenous anesthetic drugs (IVADs), or the combination of both, on outcomes...
2017: PloS One
https://www.readbyqxmd.com/read/28873072/amplitude-integrated-eeg-and-brain-sparing-in-preterm-small-for-gestational-age-infants
#11
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/28868196/novel-approach-to-continuous-neurophysiological-monitoring-during-surgery-of-peripheral-nerve-tumors
#12
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/28866028/long-term-impairment-of-cognitive-functions-and-alterations-of-nmdar-subunits-after-continuous-microwave-exposure
#13
Hui Wang, Shengzhi Tan, Xinping Xu, Li Zhao, Jing Zhang, Binwei Yao, Yabing Gao, Hongmei Zhou, Ruiyun Peng
OBJECTIVE: The long term effects of continuous microwave exposure cannot be ignored for the simulation of the real environment and increasing concerns about the negative cognitive effects of microwave exposure. METHODS: In this study, 220 male Wistar rats were exposed by a 2.856GHz radiation source with the average power density of 0, 2.5, 5 and 10mW/cm(2) for 6min/day, 5days/week and up to 6weeks. The MWM task, the EEG analysis, the hippocampus structure observation and the western blot were applied until the 12months after microwave exposure to detect the spatial learning and memory abilities, the cortical electrical activity, changes of hippocampal structure and the NMDAR subunits expressions...
September 1, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28865755/the-relationship-between-the-superior-frontal-cortex-and-alpha-oscillation-in-a-flanker-task-simultaneous-recording-of-electroencephalogram-eeg-and-near-infrared-spectroscopy-nirs
#14
Kota Suzuki, Yasuko Okumura, Yosuke Kita, Yuhei Oi, Haruo Shinoda, Masumi Inagaki
Activity in the alpha band of the electroencephalogram (EEG) reflects functional inhibition of the cerebral cortex. The superior frontal cortex (SFC) is known to control alpha activity. Based on this relationship between SFC and alpha, we hypothesized that SFC controlled alpha mediates proactive control over interference. In this study, we examined the relationship between SFC and alpha in the flanker task by simultaneously recording EEG and near infrared spectroscopy (NIRS). Forty participants performed a flanker task with occasional (compatible 75%, incompatible 25%) and successive (incompatible 100%) conditions...
August 30, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28862995/intracranial-eeg-fluctuates-over-months-after-implanting-electrodes-in-human-brain
#15
Hoameng Ung, Steven N Baldassano, Hank Bink, Abba M Krieger, Shawniqua Williams, Flavia Vitale, Chengyuan Wu, Dean Freestone, Ewan Nurse, Kent Leyde, Kathryn A Davis, Mark Cook, Brian Litt
OBJECTIVE: Implanting subdural and penetrating electrodes in the brain causes acute trauma and inflammation that affect intracranial electroencephalographic (iEEG) recordings. This behavior and its potential impact on clinical decision-making and algorithms for implanted devices have not been assessed in detail. In this study we aim to characterize the temporal and spatial variability of continuous, prolonged human iEEG recordings. APPROACH: Intracranial electroencephalography from 15 patients with drug-refractory epilepsy, each implanted with 16 subdural electrodes and continuously monitored for an average of 18 months, was included in this study...
October 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28859916/the-effect-of-type-of-afferent-feedback-timed-with-motor-imagery-on-the-induction-of-cortical-plasticity
#16
N Mrachacz-Kersting, M Voigt, Ajt Stevenson, S Aliakbaryhosseinabadi, N Jiang, K Dremstrup, D Farina
A peripherally generated afferent volley that arrives at the peak negative (PN) phase during the movement related cortical potential (MRCP) induces significant plasticity at the cortical level in healthy individuals and chronic stroke patients. Transferring this type of associative brain-computer interface (BCI) intervention into the clinical setting requires that the proprioceptive input is comparable to the techniques implemented during the rehabilitation process. These consist mainly of functional electrical stimulation (FES) and passive movement induced by an actuated orthosis...
August 28, 2017: Brain Research
https://www.readbyqxmd.com/read/28859124/effect-of-general-anesthesia-on-neonatal-aeeg-a-cohort-study-of-patients-with-non-cardiac-congenital-anomalies
#17
Lisanne J Stolwijk, Lauren C Weeke, Linda S de Vries, Maud Y A van Herwaarden, David C van der Zee, Desiree B M van der Werff, Manon J N L Benders, Mona Toet, Petra M A Lemmers
INTRODUCTION: The aim of the current study was to determine the effect of general anesthesia on neonatal brain activity using amplitude-integrated EEG (aEEG). METHODS: A prospective cohort study of neonates (January 2013-December 2015), who underwent major neonatal surgery for non-cardiac congenital anomalies. Anesthesia was administered at the discretion of the anesthetist. aEEG monitoring was started six hours preoperatively until 24 hours after surgery. Analysis of classes of aEEG background patterns, ranging from continuous normal voltage to flat trace in six classes, and quantitative EEG-measures, using spontaneous activity transients (SATs) and interSATintervals (ISI), was performed...
2017: PloS One
https://www.readbyqxmd.com/read/28858905/electroencephalogram-abnormalities-during-positional-changes-in-brain-sagging-syndrome
#18
Benziger Bensam, Heustein L Sy, Nadia Sotudeh, Paulomi K Bhalla, Sean T Hwang, David E LeDoux
PURPOSE: Brain sagging after craniotomy and clipping of a ruptured aneurysm is a rare complication. Clinical and electrographic changes in patients with a final diagnosis of intracranial hypotension are not well described, and can be mistaken on rare occasions for other entities such as nonconvulsive status epilepticus. There may be resulting delay in the diagnosis and treatment of this potentially life-threatening disorder. METHODS: Case report and imaging. RESULTS: We present a case of intracranial hypotension in which concerning continuous electroencephalogram (cEEG) and quantitative EEG (qEEG) findings were noted during active sagging of the brain, which resolved with supine positioning...
August 30, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/28854540/electroencephalography-and-delirium-in-the-postoperative-period
#19
B J A Palanca, T S Wildes, Y S Ju, S Ching, M S Avidan
Delirium commonly manifests in the postoperative period as a clinical syndrome resulting from acute brain dysfunction or encephalopathy. Delirium is characterized by acute and often fluctuating changes in attention and cognition. Emergence delirium typically presents and resolves within minutes to hours after termination of general anaesthesia. Postoperative delirium hours to days after an invasive procedure can herald poor outcomes. Easily recognized when patients are hyperactive or agitated, delirium often evades diagnosis as it most frequently presents with hypoactivity and somnolence...
August 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28852582/term-neonate-with-atypical-hypoxic-ischemic-encephalopathy-presentation-a-case-report
#20
Nick Townley, Emily McNellis, Venkatesh Sampath
We describe a case of atypical hypoxic-ischemic encephalopathy (HIE) in a neonate following a normal pregnancy and delivery who was found to have an umbilical vein thrombosis. The infant arrived to our center with continuous bicycling movement of her lower extremities. She had a continuous electroencephalogram that showed burst suppression and magnetic resonance imaging of the brain showed diffusely abnormal cerebral cortical/subcortical diffusion restriction which may be secondary hypoxic-ischemic injury. Interestingly, a pathology report noted a focal umbilical vein thrombosis appearing to have compressed an umbilical artery with associated arterial dissection and hematoma...
July 2017: American Journal of Perinatology Reports
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