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https://www.readbyqxmd.com/read/29342443/test-retest-reliability-of-transcranial-magnetic-stimulation-eeg-evoked-potentials
#1
Lewis J Kerwin, Corey J Keller, Wei Wu, Manjari Narayan, Amit Etkin
BACKGROUND: Transcranial magnetic stimulation (TMS)-evoked potentials (TEPs), recorded using electroencephalography (TMS-EEG), offer a powerful tool for measuring causal interactions in the human brain. However, the test-retest reliability of TEPs, critical to their use in clinical biomarker and interventional studies, remains poorly understood. OBJECTIVE/HYPOTHESIS: We quantified TEP reliability to: (i) determine the minimal TEP amplitude change which significantly exceeds that associated with simply re-testing, (ii) locate the most reliable scalp regions of interest (ROIs) and TEP peaks, and (iii) determine the minimal number of TEP pulses for achieving reliability...
December 29, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/29336768/is-routine-continuous-eeg-for-traumatic-brain-injury-beneficial
#2
Lia Aquino, Christopher Y Kang, Megan Y Harada, Ara Ko, Amy Do-Nguyen, Eric J Ley, Daniel R Margulies, Rodrigo F Alban
Severe traumatic brain injury (TBI) is associated with increased risk for early clinical and subclinical seizures. The use of continuous electroencephalography (cEEG) monitoring after TBI allows for identification and treatment of seizures that may otherwise occur undetected. Benefits of "routine" cEEG after TBI remain controversial. We examined the rate of subclinical seizures identified by cEEG in TBI patients admitted to a Level I trauma center. We analyzed a cohort of trauma patients with moderate to severe TBI (head Abbreviated Injury Score ≥3) who received cEEG within seven days of admission between October 2011 and May 2015...
December 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/29331056/exploring-the-advantages-of-multiband-fmri-with-simultaneous-eeg-to-investigate-coupling-between-gamma-frequency-neural-activity-and-the-bold-response-in-humans
#3
Makoto Uji, Ross Wilson, Susan T Francis, Karen J Mullinger, Stephen D Mayhew
We established an optimal combination of EEG recording during sparse multiband (MB) fMRI that preserves high-resolution, whole-brain fMRI coverage while enabling broad-band EEG recordings which are uncorrupted by MRI gradient artefacts (GAs). We first determined the safety of simultaneous EEG recording during MB fMRI. Application of MB factor = 4 produced <1°C peak heating of electrode/hardware during 20 min of GE-EPI data acquisition. However, higher SAR sequences require specific safety testing, with greater heating observed using PCASL with MB factor = 4...
January 13, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29329819/the-effect-of-continuous-positive-airway-pressure-on-spectral-encephalogram-characteristics-in-stroke-patients-with-obstructive-sleep-apnea
#4
Hisham Alshaer, Aditya Pandya, Igor Zivanovic, Carolina Gonzaga Carvalho, Clodagh Ryan
OBJECTIVES: To evaluate if treatment with continuous positive airway pressure (CPAP) compared to usual care in stroke patients with obstructive sleep apnea (OSA) over one month reduces delta and alpha oscillations on quantitative electroencephalography (EEG) in association with improvements in cognitive or functional outcomes. METHODS: Spectral EEG analysis was performed in patients with subacute stroke and OSA randomized to usual care or CPAP treatment from a previous study...
January 9, 2018: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/29329250/blood-flow-and-continuous-eeg-changes-during-symptomatic-plateau-waves
#5
Natalie Kreitzer, Maggie Huynh, Brandon Foreman
Benign meningiomas uncommonly lead to significant cerebral edema, with only a few cases previously reported in the medical literature. The present study describes the case of a 49-year-old female who had a meningioma resection. She subsequently developed malignant cerebral edema and had episodes that were initially concerning for seizure activity. However, transient blood flow changes concerning for intracranial pressure (ICP) crises, were demonstrated on electroencephalogram (EEG) as well as noninvasive cerebral blood flow monitoring...
January 12, 2018: Brain Sciences
https://www.readbyqxmd.com/read/29324507/determining-when-to-stop-antiepileptic-drug-treatment
#6
Steven C Schachter
PURPOSE OF REVIEW: As the number of patients diagnosed with epilepsy continues to rise and the pharmacological and device-based treatment options for epilepsy increase, determining when to stop antiepileptic drug (AED) treatment continues to be an important issue for patient management and counseling. RECENT FINDINGS: This review focuses on outcomes following AED withdrawal in seizure-free adults with epilepsy. Practical considerations are also discussed because, despite the importance of this topic, relatively little progress has been made in the past year regarding the identification of patients whose risk for recurrent seizures after AED withdrawal is no higher than that of the general population...
January 10, 2018: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29295522/comparison-between-scalp-eeg-and-behind-the-ear-eeg-for-development-of-a-wearable-seizure-detection-system-for-patients-with-focal-epilepsy
#7
Ying Gu, Evy Cleeren, Jonathan Dan, Kasper Claes, Wim Van Paesschen, Sabine Van Huffel, Borbála Hunyadi
A wearable electroencephalogram (EEG) device for continuous monitoring of patients suffering from epilepsy would provide valuable information for the management of the disease. Currently no EEG setup is small and unobtrusive enough to be used in daily life. Recording behind the ear could prove to be a solution to a wearable EEG setup. This article examines the feasibility of recording epileptic EEG from behind the ear. It is achieved by comparison with scalp EEG recordings. Traditional scalp EEG and behind-the-ear EEG were simultaneously acquired from 12 patients with temporal, parietal, or occipital lobe epilepsy...
December 23, 2017: Sensors
https://www.readbyqxmd.com/read/29282444/obstructive-sleep-apnea-presenting-as-non-epileptic-spells-a-unique-combination
#8
Prashant Natteru, Chintan Rupareliya, Xiangping Zhou, Pradeep C Bollu
Obstructive sleep apnea (OSA), an increasingly prevalent sleep disorder, has been extensively studied in both clinical and scientific settings. In most cases, the diagnosis of sleep apnea is straightforward with patients having symptoms of snoring, choking or gasping for air while asleep and witnessed apneas. However, sleep apnea is known to present in some unusual ways. We present a case of a 61-year-old male, with recently diagnosed obstructive sleep apnea (currently not on continuous positive airway pressure (CPAP)) and a history of seizure-like events since the age of 18 years, who came to the epilepsy monitoring unit (EMU) for spell characterization of his frequent seizure-like episodes...
October 24, 2017: Curēus
https://www.readbyqxmd.com/read/29277720/extracting-information-from-the-shape-and-spatial-distribution-of-evoked-potentials
#9
Vítor Lopes-Dos-Santos, Hernan G Rey, Joaquin Navajas, Rodrigo Quian Quiroga
BACKGROUND: Over 90 years after its first recording, scalp electroencephalography (EEG) remains one of the most widely used techniques in human neuroscience research, in particular for the study of event-related potentials (ERPs). However, because of its low signal-to-noise ratio, extracting useful information from these signals continues to be a hard-technical challenge. Many studies focus on simple properties of the ERPs such as peaks, latencies, and slopes of signal deflections. NEW METHOD: To overcome these limitations, we developed the Wavelet-Information method which uses wavelet decomposition, information theory, and a quantification based on single-trial decoding performance to extract information from evoked responses...
December 22, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29276490/dual-frequency-head-maps-a-new-method-for-indexing-mental-workload-continuously-during-execution-of-cognitive-tasks
#10
Thea Radüntz
One goal of advanced information and communication technology is to simplify work. However, there is growing consensus regarding the negative consequences of inappropriate workload on employee's health and the safety of persons. In order to develop a method for continuous mental workload monitoring, we implemented a task battery consisting of cognitive tasks with diverse levels of complexity and difficulty. We conducted experiments and registered the electroencephalogram (EEG), performance data, and the NASA-TLX questionnaire from 54 people...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29262437/ictal-interictal-continuum-when-to-worry-about-the-continuous-electroencephalography-pattern
#11
Justine Cormier, Carolina B Maciel, Emily J Gilmore
Continuous electroencephalography (cEEG) monitoring is an invaluable tool in the evaluation of encephalopathy and coma in critically ill patients. Marked increases in cEEG monitoring, coinciding with several societal guideline statements in the last decade, have allowed earlier detection and treatment of clearly harmful patterns, including nonconvulsive seizures (NCSz) and nonconvulsive status epilepticus (NCSE). However, it has also unmasked a range of EEG patterns of less clear clinical significance, with some more "malignant" than others given their potential association with increased neuronal stress and secondary brain injury...
December 2017: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29261454/development-of-an-inline-dry-power-inhaler-that-requires-low-air-volume
#12
Dale Farkas, Michael Hindle, P Worth Longest
BACKGROUND: Inline dry powder inhalers (DPIs) are actuated by an external air source and have distinct advantages for delivering aerosols to infants and children, and to individuals with compromised lung function or who require ventilator support. However, current inline DPIs either perform poorly, are difficult to operate, and/or require large volumes (∼1 L) of air. The objective of this study was to develop and characterize a new inline DPI for aerosolizing spray-dried formulations with powder masses of 10 mg and higher using a dispersion air volume of 10 mL per actuation that is easy to load (capsule-based) and operate...
December 20, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/29251645/dopamine-d2-receptor-antagonist-droperidol-deepens-sevoflurane-anesthesia
#13
Ryuhei Araki, Kazuko Hayashi, Teiji Sawa
BACKGROUND: Although midbrain dopaminergic pathways are known to contribute to arousal and emergence from anesthesia, few reports exist regarding the anesthetic effects of dopamine D2 receptor antagonism in humans. This study examined the effect of the D2 receptor antagonist droperidol on sevoflurane anesthesia by examining α and slow wave electroencephalogram oscillations. METHODS: Forty-five patients, age 20 to 60 yr, were enrolled. Frontal electroencephalograms were continuously collected for offline analysis via Bispectral Index monitoring...
December 15, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29248799/early-withdrawal-of-non-anesthetic-antiepileptic-drugs-after-successful-termination-of-nonconvulsive-seizures-and-nonconvulsive-status-epilepticus
#14
Jennifer A Creed, Jake Son, Alfredo E Farjat, Christa B Swisher
PURPOSE: Multiple antiepileptic drugs (AEDs) are often necessary to treat nonconvulsive seizures (NCS) and nonconvulsive status epilepticus (NCSE). AED polypharmacy places patients at risk for adverse side effects and drug-drug interactions. Identifying the likelihood of seizure relapse when weaning non-anesthetic AEDs may provide guidance in the critical care unit. METHOD: Ninety-nine adult patients with successful treatment of electrographic-proven NCS or NCSE on continuous critical care EEG (CCEEG) monitoring were identified retrospectively...
December 8, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29244803/changes-in-brain-morphology-and-microstructure-in-relation-to-early-brain-activity-in-extremely-preterm-infants
#15
Maria Luisa Tataranno, Nathalie H P Claessens, Pim Moeskops, Mona C Toet, Karina J Kersbergen, Giuseppe Buonocore, Ivana Išgum, Alexander Leemans, Serena Counsell, Floris Groenendaal, Linda S de Vries, Manon J N L Benders
OBJECTIVE: To investigate the relation of early brain activity with structural (growth of the cortex and cerebellum) and white matter microstructural brain development. METHODS: 33 preterm neonates (gestational age 26±1 weeks) without major brain abnormalities were continuously monitored with electroencephalography (EEG) during the first 48 h of life. Rate of spontaneous activity transients per minute (SAT rate) and interSAT interval (ISI) in seconds per minute were calculated...
December 15, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29242555/intrinsic-interactive-reinforcement-learning-using-error-related-potentials-for-real-world-human-robot-interaction
#16
Su Kyoung Kim, Elsa Andrea Kirchner, Arne Stefes, Frank Kirchner
Reinforcement learning (RL) enables robots to learn its optimal behavioral strategy in dynamic environments based on feedback. Explicit human feedback during robot RL is advantageous, since an explicit reward function can be easily adapted. However, it is very demanding and tiresome for a human to continuously and explicitly generate feedback. Therefore, the development of implicit approaches is of high relevance. In this paper, we used an error-related potential (ErrP), an event-related activity in the human electroencephalogram (EEG), as an intrinsically generated implicit feedback (rewards) for RL...
December 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29241839/the-theta-burst-transcranial-magnetic-stimulation-over-the-right-pfc-affects-electroencephalogram-oscillation-during-emotional-processing
#17
Dan Cao, Yingjie Li, Margaret A Niznikiewicz, Yingying Tang, Jijun Wang
Prefrontal cortex (PFC) plays an important role in emotional processing and therefore is one of the most frequently targeted regions for non-invasive brain stimulation such as repetitive transcranial magnetic stimulation (rTMS) in clinical trials, especially in the treatment of emotional disorders. As an approach to enhance the effectiveness of rTMS, continuous theta burst stimulation (cTBS) has been demonstrated to be efficient and safe. However, it is unclear how cTBS affects brain processes related to emotion...
December 11, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29236042/single-channel-eeg-artifact-identification-using-two-dimensional-multi-resolution-analysis
#18
Mojtaba Taherisadr, Omid Dehzangi, Hossein Parsaei
As a diagnostic monitoring approach, electroencephalogram (EEG) signals can be decoded by signal processing methodologies for various health monitoring purposes. However, EEG recordings are contaminated by other interferences, particularly facial and ocular artifacts generated by the user. This is specifically an issue during continuous EEG recording sessions, and is therefore a key step in using EEG signals for either physiological monitoring and diagnosis or brain-computer interface to identify such artifacts from useful EEG components...
December 13, 2017: Sensors
https://www.readbyqxmd.com/read/29231542/-clinical-research-of-electroacupuncture-on-the-analgesic-effect-of-thoracic-perioperative-stage
#19
Mintao Zhou, Yu Li, Xuechang Han, Qunzhi Xing, Yiyao Wang, Xu Dong, Junxiao Chang
OBJECTIVE: To discuss the clinical therapeutic effects of electroacupuncture at Neimadian (Extra) and Neiguan (PC 6) on the analgesic effect of thoracic perioperative stage and its effect mechanism. METHODS: Sixty cases of esophageal cancer with elective radical resection under general anesthesia were divided into an observation group and a control group according to the operation sequence, 30 cases in each one. In the control group, the general anesthesia was simply applied and sufentanil was administered for patient controlled intravenous analgesia (PCIA) after operation...
July 12, 2017: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29230239/a-comparison-study-on-multidomain-eeg-features-for-sleep-stage-classification
#20
Yu Zhang, Bei Wang, Jin Jing, Jian Zhang, Junzhong Zou, Masatoshi Nakamura
Feature extraction from physiological signals of EEG (electroencephalogram) is an essential part for sleep staging. In this study, multidomain feature extraction was investigated based on time domain analysis, nonlinear analysis, and frequency domain analysis. Unlike the traditional feature calculation in time domain, a sequence merging method was developed as a preprocessing procedure. The objective is to eliminate the clutter waveform and highlight the characteristic waveform for further analysis. The numbers of the characteristic activities were extracted as the features from time domain...
2017: Computational Intelligence and Neuroscience
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