keyword
MENU ▼
Read by QxMD icon Read
search

Electroencephalogram

keyword
https://www.readbyqxmd.com/read/29684224/mismatch-negativity-and-cortical-thickness-in-patients-with-schizophrenia-and-bipolar-disorder
#1
Sungkean Kim, Hyeonjin Jeon, Kuk-In Jang, Yong-Wook Kim, Chang-Hwan Im, Seung-Hwan Lee
Introduction: Mismatch negativity (MMN) is a measure of automatic neurophysiological brain processes for detecting unexpected sensory stimuli. This study investigated MMN reduction in patients with schizophrenia and bipolar disorder and examined whether cortical thickness is associated with MMN, for exploratory purposes. Methods: Electroencephalograms were recorded in 38 patients with schizophrenia, 37 patients with bipolar disorder, and 32 healthy controls (HCs) performing a passive auditory oddball paradigm...
April 19, 2018: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29684039/development-and-validation-of-brain-target-controlled-infusion-of-propofol-in-mice
#2
Brenna P Shortal, Sarah L Reitz, Adeeti Aggarwal, Qing C Meng, Andrew R McKinstry-Wu, Max B Kelz, Alex Proekt
Mechanisms through which anesthetics disrupt neuronal activity are incompletely understood. In order to study anesthetic mechanisms in the intact brain, tight control over anesthetic pharmacology in a genetically and neurophysiologically accessible animal model is essential. Here, we developed a pharmacokinetic model that quantitatively describes propofol distribution into and elimination out of the brain. To develop the model, we used jugular venous catheters to infuse propofol in mice and measured propofol concentration in serial timed brain and blood samples using high performance liquid chromatography (HPLC)...
2018: PloS One
https://www.readbyqxmd.com/read/29682871/the-effects-of-anticipating-a-high-stress-task-on-sleep-and-performance-during-simulated-on-call-work
#3
Madeline Sprajcer, Sarah M Jay, Grace E Vincent, Andrew Vakulin, Leon Lack, Sally A Ferguson
On-call work is used to manage around the clock working requirements in a variety of industries. Often, tasks that must be performed while on-call are highly important, difficult and/or stressful by nature and, as such, may impact the level of anxiety that is experienced by on-call workers. Heightened anxiety is associated with poor sleep, which affects next-day cognitive performance. Twenty-four male participants (20-35 years old) spent an adaptation, a control and two counterbalanced on-call nights in a time-isolated sleep laboratory...
April 22, 2018: Journal of Sleep Research
https://www.readbyqxmd.com/read/29682000/an-adaptive-calibration-framework-for-mvep-based-brain-computer-interface
#4
Teng Ma, Fali Li, Peiyang Li, Dezhong Yao, Yangsong Zhang, Peng Xu
Electroencephalogram signals and the states of subjects are nonstationary. To track changing states effectively, an adaptive calibration framework is proposed for the brain-computer interface (BCI) with the motion-onset visual evoked potential (mVEP) as the control signal. The core of this framework is to update the training set adaptively for classifier training. The updating procedure consists of two operations, that is, adding new samples to the training set and removing old samples from the training set...
2018: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/29680274/suppression-of-eeg-mu-rhythm-during-action-observation-corresponds-with-subsequent-changes-in-behavior
#5
Nadav Aridan, Ori Ossmy, Batel Buaron, Daniel Reznik, Roy Mukamel
Movement is intrinsically linked to perception such that observing an action induces in the observer behavioral changes during execution of similar actions. Electroencephalogram (EEG) studies have revealed that at the group level, action observation suppresses oscillatory power in mu (8-12Hz) and beta (15-25Hz) bands over the sensorimotor cortex - a phenomenon associated with increased excitability of cortical neurons. However, it is unclear whether differences in suppression level across individuals is linked with individual differences in subsequent behavioral changes...
April 19, 2018: Brain Research
https://www.readbyqxmd.com/read/29678757/ultra-coarse-single-glance-human-face-detection-in-a-dynamic-visual-stream
#6
Genevieve L Quek, Joan Liu-Shuang, Valérie Goffaux, Bruno Rossion
Effective human interaction depends on our ability to rapidly detect faces in dynamic visual environments. Here we asked how basic units of visual information (spatial frequencies, or SF) contribute to this fundamental brain function. Human observers viewed initially blurry, unrecognizable natural object images presented at a fast 12 Hz rate and parametrically increasing in SF content over the course of 1 min. By inserting highly variable natural face images as every 8th stimulus we captured an objective neural index of face detection in participants' electroencephalogram (EEG) at exactly 1...
April 17, 2018: NeuroImage
https://www.readbyqxmd.com/read/29678142/abnormally-low-bispectral-index-and-severe-hypoglycemia-during-maintenance-of-and-recovery-from-general-anesthesia-in-diabetic-retinopathy-surgery-two-case-reports
#7
Chunhua Xi, Chuxiong Pan, Tianzuo Li
BACKGROUND: Hypoglycemia is one of the most fatal complications during the perioperative period. General anesthesia or sedation can mask a hypoglycemia-altered mental status. Acute hypoglycemia might result in permanent brain injury. There is no way to detect hypoglycemia during general anesthesia, except for intermittent blood glucose monitoring. CASE PRESENTATION: Hypoglycemia is associated with changes in electroencephalogram readings. Here, we report two cases of patients with an abnormally low Bispectral Index (BIS) associated with diabetic retinopathy surgery, one in the recovery stage of general anesthesia and the other in the maintenance of general anesthesia...
April 20, 2018: BMC Anesthesiology
https://www.readbyqxmd.com/read/29675082/susac-s-syndrome-retinocochleocerebral-vasculopathy-follow-up-of-a-pediatric-patient
#8
Zeynep Selen Karalok, Birce Dilge Taskin, Alev Guven, Cemile Atilgan Ucgul, Omer Faruk Aydin
Susac's syndrome (SS) is a triad of encephalopathy, branch retinal artery occlusion (BRAO), and sensorineural hearing loss as a result of microvascular occlusions of the brain, retina, and inner ear. It is also a disorder of autoimmune endotheliopathy. SS usually affects young women between the age of 20 and 40 years. SS can be misdiagnosed as multiple sclerosis (MS) or acute disseminated encephalomyelitis (ADEM) because of similar findings. A 15-year-old girl presented in June 2015 with vomiting and severe headache...
October 2017: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/29674729/in-vitro-cortical-network-firing-is-homeostatically-regulated-a-model-for-sleep-regulation
#9
Sohrab Saberi-Moghadam, Alessandro Simi, Hesam Setareh, Cyril Mikhail, Mehdi Tafti
Prolonged wakefulness leads to a homeostatic response manifested in increased amplitude and number of electroencephalogram (EEG) slow waves during recovery sleep. Cortical networks show a slow oscillation when the excitatory inputs are reduced (during slow wave sleep, anesthesia), or absent (in vitro preparations). It was recently shown that a homeostatic response to electrical stimulation can be induced in cortical cultures. Here we used cortical cultures grown on microelectrode arrays and stimulated them with a cocktail of waking neuromodulators...
April 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29674168/spikes-might-precede-seizures-and-predict-epilepsy-in-children-with-sturge-weber-syndrome-a-pilot-study
#10
Claire Bar, Anna Kaminska, Rima Nabbout
PURPOSE: Sturge-Weber syndrome (SWS) is a neurocutaneous disorder characterized by a facial port-wine stain, a glaucoma, and a leptomeningeal angioma. Epilepsy occurs in more than 75% of affected children, and seizures occurring in the first year of life are associated with a poor neurological prognosis. The aim of this study was to identify possible predictive markers of epilepsy on electroencephalogram (EEG) performed prior to seizure onset in children with SWS. METHODS: This study included children with a diagnosis of SWS who had an EEG performed prior to seizure onset...
March 28, 2018: Epilepsy Research
https://www.readbyqxmd.com/read/29673650/differential-recruitment-of-brain-networks-in-single-digit-addition-and-multiplication-evidence-from-eeg-oscillations-in-theta-and-lower-alpha-bands
#11
Lihan Wang, John Q Gan, Li Zhang, Haixian Wang
Previous neuroimaging research investigating dissociation between single-digit addition and multiplication has suggested that the former placed more reliance on the visuo-spatial processing whereas the latter on the verbal processing. However, there has been little exploration into the disassociation in spatio-temporal dynamics of the oscillatory brain activity in specific frequency bands during the two arithmetic operations. To address this issue, the electroencephalogram (EEG) data were recorded from 19 participants engaged in a delayed verification arithmetic task...
April 16, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29673329/comparison-of-electroencephalographic-changes-in-response-to-acute-electrical-and-thermal-stimuli-with-the-tail-flick-and-hot-plate-test-in-rats-administered-with-opiorphin
#12
Preet Singh, Kavitha Kongara, David Harding, Neil Ward, Venkata Sayoji Rao Dukkipati, Craig Johnson, Paul Chambers
BACKGROUND: The objective of this study was to compare the changes in the electroencephalogram (EEG) in response to noxious stimuli with tail flick and hot plate responses of rats administered opiorphin. METHODS: Female Sprague -Dawley rats (n = 8 per group) randomly received intravenous (IV) injection of morphine (1 mg/kg,) or opiorphin (2 mg/kg,) or saline (0.5 ml,) in each of the three testing methods (EEG, tail flick and hot plate). Each type of test (n = 24 per test) was conducted in different population of rats on separate occasions...
April 19, 2018: BMC Neurology
https://www.readbyqxmd.com/read/29670563/the-relationship-between-drivers-cognitive-fatigue-and-speed-variability-during-monotonous-daytime-driving
#13
Jinfei Ma, Jiaqi Gu, Huibin Jia, Zhuye Yao, Ruosong Chang
A lack of task workload can lead to drivers' cognitive fatigue and vigilance decrement during a prolonged drive. This study examined the effects of speed variability on driving fatigue in a monotonous drive. Twenty-one participants participated in a 60-min simulated driving task. All participants' cognitive fatigue was assessed using psychological and physiological measurements. Results showed that among all participants, variability of vehicle speed was negatively correlated with sleepiness and hypo-vigilance during the driving task...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29670541/automatic-change-detection-for-real-time-monitoring-of-eeg-signals
#14
Zhen Gao, Guoliang Lu, Peng Yan, Chen Lyu, Xueyong Li, Wei Shang, Zhaohong Xie, Wanming Zhang
In recent years, automatic change detection for real-time monitoring of electroencephalogram (EEG) signals has attracted widespread interest with a large number of clinical applications. However, it is still a challenging problem. This paper presents a novel framework for this task where joint time-domain features are firstly computed to extract temporal fluctuations of a given EEG data stream; and then, an auto-regressive (AR) linear model is adopted to model the data and temporal anomalies are subsequently calculated from that model to reflect the possibilities that a change occurs; a non-parametric statistical test based on Randomized Power Martingale (RPM) is last performed for making change decision from the resulting anomaly scores...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29665725/epileptic-eeg-identification-via-lbp-operators-on-wavelet-coefficients
#15
Qi Yuan, Weidong Zhou, Fangzhou Xu, Yan Leng, Dongmei Wei
The automatic identification of epileptic electroencephalogram (EEG) signals can give assistance to doctors in diagnosis of epilepsy, and provide the higher security and quality of life for people with epilepsy. Feature extraction of EEG signals determines the performance of the whole recognition system. In this paper, a novel method using the local binary pattern (LBP) based on the wavelet transform (WT) is proposed to characterize the behavior of EEG activities. First, the WT is employed for time-frequency decomposition of EEG signals...
March 19, 2018: International Journal of Neural Systems
https://www.readbyqxmd.com/read/29664058/relationships-between-rapid-eye-movement-sleep-behavior-disorder-and-neurodegenerative-diseases-clinical-assessments-biomarkers-and-treatment
#16
REVIEW
Min Li, Li Wang, Jiang-Hong Liu, Shu-Qin Zhan
Objective: Rapid eye movement sleep behavior disorder (RBD) is characterized by dream enactment and loss of muscle atonia during rapid eye movement sleep. RBD is closely related to α-synucleinopathies including Parkinson's disease, dementia with Lewy bodies, and multiple system atrophy. Many studies have investigated the markers of imaging and neurophysiological, genetic, cognitive, autonomic function of RBD and their predictive value for neurodegenerative diseases. This report reviewed the progress of these studies and discussed their limitations and future research directions...
April 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29660939/aberrant-cortical-event-related-potentials-during-associative-learning-in-rat-models-for-presymptomatic-stages-of-alzheimer-s-disease
#17
Bardia Nouriziabari, Susmita Sarkar, Stephanie E Tanninen, Robert D Dayton, Ronald L Klein, Kaori Takehara-Nishiuchi
Trace eyeblink conditioning is a hippocampus-dependent associative learning paradigm which is impaired in patients with Alzheimer's disease (AD) and animal AD models. Learning in this paradigm accompanies changes in oscillatory activity in forebrain regions, some of which are loci of pathogenic changes in prodromal AD stages. These observations motivated us to examine how cortical event-related potentials (ERPs) during this paradigm are affected by two features of the asymptomatic, AD-related brain abnormality, entorhinal tau accumulation and mild cholinergic deficit...
April 11, 2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29657931/evaluation-of-seizure-frequency-distribution-in-epileptic-patients-with-normal-and-abnormal-electroencephalogram-in-al-zahra-hospital-of-isfahan
#18
Mohmmad Reza Najafi, Rokhsareh Meamar, Nafiseh Karimi
Background: Epilepsy is a chronic neurological disorder characterized by seizure recurrence in patients. Electroencephalogram (EEG) has a diagnostic and prognostic role in the management of patients. Studies have shown a significant relation between seizure recurrence and abnormal EEG in newly diagnosed epileptic patients, and people with first episode of unprovoked seizure. The aim of this study is to evaluate seizure frequency in chronic epileptic patients on drug therapy based on normal or abnormal EEG...
2018: Advanced Biomedical Research
https://www.readbyqxmd.com/read/29653296/the-role-of-resting-state-eeg-localized-activation-and-central-nervous-system-arousal-in-executive-function-performance-in-children-with-attention-deficit-hyperactivity-disorder
#19
Da-Wei Zhang, Stuart J Johnstone, Steven Roodenrys, Xiangsheng Luo, Hui Li, Encong Wang, Qihua Zhao, Yan Song, Lu Liu, Qiujin Qian, Yufeng Wang, Li Sun
OBJECTIVE: This study explored the relationships between resting-state electroencephalogram (RS-EEG) localized activation and two important types of executive functions (EF) to extend the prognostic utilization of RS-EEG in children with Attention-Deficit/Hyperactivity Disorder (AD/HD). Also, the role of central nervous system (CNS) arousal in the relationships was examined. METHODS: Fifty-eight children with AD/HD participated in the study. RS-EEG localized activation was derived from spectral power differences between EEG in eyes-closed and eyes-open conditions...
March 30, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29650639/non-convulsive-status-epilepticus-mimics-and-chameleons
#20
REVIEW
Michael Owen Kinney, John J Craig, P W Kaplan
Non-convulsive status epilepticus (NCSE) is an enigmatic condition with protean manifestations. It often goes unrecognised, leading to delays in its diagnosis and treatment. The principal reason for such delay is the failure to consider and request an electroencephalogram (EEG), although occasional presentations have no scalp or surface electroencephalographic correlate. In certain settings with limited EEG availability, particularly out-of-hours, clinicians should consider treating without an EEG. Patients need a careful risk-benefit analysis to assess the risks of neuronal damage and harm versus the risks of adverse effects from various intensities of therapeutic intervention...
April 12, 2018: Practical Neurology
keyword
keyword
7436
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"