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Quantitative eeg

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https://www.readbyqxmd.com/read/27916830/influence-of-fragrances-on-human-psychophysiological-activity-with-special-reference-to-human-electroencephalographic-response
#1
REVIEW
Kandhasamy Sowndhararajan, Songmun Kim
The influence of fragrances such as perfumes and room fresheners on the psychophysiological activities of humans has been known for a long time, and its significance is gradually increasing in the medicinal and cosmetic industries. A fragrance consists of volatile chemicals with a molecular weight of less than 300 Da that humans perceive through the olfactory system. In humans, about 300 active olfactory receptor genes are devoted to detecting thousands of different fragrance molecules through a large family of olfactory receptors of a diverse protein sequence...
November 29, 2016: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/27909453/the-effect-of-high-frequency-repetitive-transcranial-magnetic-stimulation-on-occupational-stress-among-health-care-workers-a-pilot-study
#2
Young In Kim, Sun Mi Kim, Hyungjin Kim, Doug Hyun Han
OBJECTIVE: Repetitive transcranial magnetic stimulation (rTMS) was approved by the Food and Drug Administration to alleviate symptoms of treatment-resistant depression. This study aimed to evaluate the effectiveness of rTMS treatment on alleviating occupational stress by evaluating clinical symptoms and quantitative electroencephalography (QEEG). METHODS: Twenty-four health care workers were randomized to receive 12 sessions of active or sham rTMS delivered to the left dorsolateral prefrontal cortex (DLPFC)...
November 2016: Psychiatry Investigation
https://www.readbyqxmd.com/read/27896005/cerebral-blood-flow-is-decoupled-from-blood-pressure-and-linked-to-eeg-bursting-after-resuscitation-from-cardiac-arrest
#3
Christian Crouzet, Robert H Wilson, Afsheen Bazrafkan, Maryam H Farahabadi, Donald Lee, Juan Alcocer, Bruce J Tromberg, Bernard Choi, Yama Akbari
In the present study, we have developed a multi-modal instrument that combines laser speckle imaging, arterial blood pressure, and electroencephalography (EEG) to quantitatively assess cerebral blood flow (CBF), mean arterial pressure (MAP), and brain electrophysiology before, during, and after asphyxial cardiac arrest (CA) and resuscitation. Using the acquired data, we quantified the time and magnitude of the CBF hyperemic peak and stabilized hypoperfusion after resuscitation. Furthermore, we assessed the correlation between CBF and MAP before and after stabilized hypoperfusion...
November 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27883343/interhemispheric-connectivity-estimated-from-eeg-time-correlation-analysis-in-preterm-infants-with-normal-follow-up-at-age-of-five
#4
E J Meijer, H J Niemarkt, I P P C Raaijmakers, A M Mulder, C van Pul, P F F Wijn, P Andriessen
Brain connectivity is associated with axonal connections between brain structures. Our goal was to quantify the interhemispheric neuronal connectivity in healthy preterm infants by automated quantitative EEG time-correlation analysis. As with advancing postmenstrual age (PMA, gestational age  +  postnatal age) the neuronal connectivity between left and right hemisphere increases, we expect to observe changes in EEG time-correlation with age. Thirty-six appropriate-for-gestational age preterm infants (PMA between 27-37 weeks) and normal neurodevelopmental follow-up at 5 years of age were included...
November 24, 2016: Physiological Measurement
https://www.readbyqxmd.com/read/27874295/mechanism-of-low-level-microwave-radiation-effect-on-nervous-system
#5
Hiie Hinrikus, Maie Bachmann, Denis Karai, Jaanus Lass
The aim of this study is to explain the mechanism of the effect of low-level modulated microwave radiation on brain bioelectrical oscillations. The proposed model of excitation by low-level microwave radiation bases on the influence of water polarization on hydrogen bonding forces between water molecules, caused by this the enhancement of diffusion and consequences on neurotransmitters transit time and neuron resting potential. Modulated microwave radiation causes periodic alteration of the neurophysiologic parameters and parametric excitation of brain bioelectric oscillations...
November 22, 2016: Electromagnetic Biology and Medicine
https://www.readbyqxmd.com/read/27873552/correlated-eeg-signals-simulation-based-on-artificial-neural-networks
#6
Nikola M Tomasevic, Aleksandar M Neskovic, Natasa J Neskovic
In recent years, simulation of the human electroencephalogram (EEG) data found its important role in medical domain and neuropsychology. In this paper, a novel approach to simulation of two cross-correlated EEG signals is proposed. The proposed method is based on the principles of artificial neural networks (ANN). Contrary to the existing EEG data simulators, the ANN-based approach was leveraged solely on the experimentally acquired EEG data. More precisely, measured EEG data were utilized to optimize the simulator which consisted of two ANN models (each model responsible for generation of one EEG sequence)...
September 30, 2016: International Journal of Neural Systems
https://www.readbyqxmd.com/read/27862172/investigation-of-brain-electrophysiological-properties-among-heroin-addicts-quantitative-eeg-and-event-related-potentials
#7
Farid Motlagh, Fatimah Ibrahim, Rusdi Rashid, Tahereh Seghatoleslam, Hussain Habil
This study aims to introduce a new approach of a comprehensive paradigm to evaluate brain electrophysiological properties among addicts. Electroencephalographic spectral power as well as amplitudes and latencies of mismatch negativity (MMN), P300, and P600 components were evaluated among 19 male heroin addicts and 19 healthy nonsmoker subjects using a paradigm consisting of three subparadigms, namely (1) digit span Wechsler test, (2) auditory oddball, and (3) visual cue-reactivity oddball paradigms. Task 1 provided auditory P300 and P600 in association with working memory...
November 8, 2016: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/27861851/infant-social-attention-an-endophenotype-of-asd-related-traits
#8
Emily J H Jones, Kaitlin Venema, Rachel K Earl, Rachel Lowy, Sara J Webb
BACKGROUND: As a neurodevelopmental disorder, symptoms of ASD likely emerge from a complex interaction between preexisting genetic vulnerabilities and the child's environment. One way to understand causal paths to ASD is to identify dimensional ASD-related traits that vary in the general population and that predispose individuals with other risk factors toward ASD. Moving beyond behavioral traits to explore underlying neurocognitive processes may further constrain the underlying genetics...
November 8, 2016: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/27860547/the-discovery-of-suvorexant-the-first-orexin-receptor-drug-for-insomnia
#9
Paul J Coleman, Anthony L Gotter, W Joseph Herring, Christopher J Winrow, John J Renger
Historically, pharmacological therapies have used mechanisms such as γ- aminobutyric acid A (GABAA) receptor potentiation to drive sleep through broad suppression of central nervous system activity. With the discovery of orexin signaling loss as the etiology underlying narcolepsy, a disorder associated with hypersomnolence, orexin antagonism emerged as an alternative approach to attenuate orexin-induced wakefulness more selectively. Dual orexin receptor antagonists (DORAs) block the activity of orexin 1 and 2 receptors to both reduce the threshold to transition into sleep and attenuate orexin-mediated arousal...
November 17, 2016: Annual Review of Pharmacology and Toxicology
https://www.readbyqxmd.com/read/27855264/acute-effects-of-near-infrared-light-therapy-on-brain-state-in-healthy-subjects-as-quantified-by-qeeg-measures
#10
Fred Grover, Jon Weston, Michael Weston
OBJECTIVE: Recent investigation suggests that near infrared (NIR) light may improve symptoms from mild traumatic brain injury. In addition, quantitative electroencephalography (qEEG) has shown measures correlating with concussion: P300, reaction time, and amplitude. The objective of this study was to determine whether NIR light treatment has an acute effect on brain state in healthy patients as measured by EEG. METHODS: A total of 31 healthy volunteers, between the ages of 14 and 65, underwent qEEG event-related response tests before and after a 20-min NIR light head treatment...
November 17, 2016: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/27845668/quantitative-eeg-evaluation-during-robot-assisted-foot-movement
#11
Emanuela Formaggio, Stefano Masiero, Anna Bosco, Federica Izzi, Francesco Piccione, Alessandra Del Felice
Passive and imagined limb movements induce changes in cerebral oscillatory activity. Central modulatory effects play a role in plastic changes, and are of uttermost importance in rehabilitation. This has extensively been studied for upper limb, but less is known for lower limb. The aim of this study is to investigate the topographical distribution of event-related desynchronization/synchronization (ERD/ERS) and task-related coherence during a robot-assisted and a motor imagery task of lower limb in healthy subjects to inform rehabilitation paradigms...
November 9, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27837050/application-and-evaluation-of-independent-component-analysis-methods-to-generalized-seizure-disorder-activities-exhibited-in-the-brain
#12
S Thomas George, R Balakrishnan, J Stanly Johnson, J Jayakumar
EEG records the spontaneous electrical activity of the brain using multiple electrodes placed on the scalp, and it provides a wealth of information related to the functions of brain. Nevertheless, the signals from the electrodes cannot be directly applied to a diagnostic tool like brain mapping as they undergo a "mixing" process because of the volume conduction effect in the scalp. A pervasive problem in neuroscience is determining which regions of the brain are active, given voltage measurements at the scalp...
November 11, 2016: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27831885/an-asynchronous-p300-based-brain-computer-interface-web-browser-for-severely-disabled-people
#13
Victor Martinez-Cagigal, Javier Gomez-Pilar, Daniel Alvarez, Roberto Hornero
This paper presents an electroencephalographic (EEG) P300-based brain-computer interface (BCI) Internet browser. The system uses the "odd-ball" row-col paradigm for generating the P300 evoked potentials on the scalp of the user, which are immediately processed and translated into web browser commands. There were previous approaches for controlling a BCI web browser. However, to the best of our knowledge, none of them was focused on an assistive context, failing to test their applications with a suitable number of end users...
October 31, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27830938/quantitative-electroencephalography-in-a-swine-model-of-blast-induced-brain-injury
#14
Chaoyang Chen, Chengpeng Zhou, John M Cavanaugh, Srinivasu Kallakuri, Alok Desai, Liying Zhang, Albert I King
OBJECTIVE: Electroencephalography (EEG) was used to examine brain activity abnormalities earlier after blast exposure using a swine model to develop a qEEG data analysis protocol. METHODS: Anaesthetized swine were exposed to 420-450 Kpa blast overpressure and survived for 3 days after blast. EEG recordings were performed at 15 minutes before the blast and 15 minutes, 30 minutes, 2 hours and 1, 2 and 3 days post-blast using surface recording electrodes and a Biopac 4-channel data acquisition system...
November 10, 2016: Brain Injury: [BI]
https://www.readbyqxmd.com/read/27823716/association-between-slow-wave-activity-cognition-and-behaviour-in-children-with-sleep-disordered-breathing
#15
Aidan J Weichard, Lisa M Walter, Samantha L Hollis, Gillian M Nixon, Margot J Davey, Rosemary S C Horne, Sarah N Biggs
BACKGROUND: It has been suggested that impaired dissipation of slow-wave activity (SWA) in children with sleep-disordered breathing (SDB) may be a potential mechanism for daytime dysfunction. We aimed to examine whether resolution of SDB resulted in normalisation of SWA dissipation and whether this was associated with improved cognition and behaviour. METHODS: Children (aged 3-6 y) diagnosed with SDB and age-matched non-snoring control children were followed up for 3 y after a baseline study...
September 2016: Sleep Medicine
https://www.readbyqxmd.com/read/27811533/spectral-electroencephalogram-analysis-for-the-evaluation-of-encephalopathy-grade-in-children-with-acute-liver-failure
#16
Craig A Press, Lindsey Morgan, Michele Mills, Cynthia V Stack, Joshua L Goldstein, Estella M Alonso, Mark S Wainwright
OBJECTIVE: Spectral electroencephalogram analysis is a method for automated analysis of electroencephalogram patterns, which can be performed at the bedside. We sought to determine the utility of spectral electroencephalogram for grading hepatic encephalopathy in children with acute liver failure. DESIGN: Retrospective cohort study. SETTING: Tertiary care pediatric hospital. PATIENTS: Patients between 0 and 18 years old who presented with acute liver failure and were admitted to the PICU...
November 1, 2016: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/27807157/the-role-of-glun2c-containing-nmda-receptors-in-ketamine-s-psychotogenic-action-and-in-schizophrenia-models
#17
Elizaveta Khlestova, Jon W Johnson, John H Krystal, John Lisman
The NMDA receptor (NMDAR) hypofunction hypothesis of schizophrenia is supported by multiple lines of evidence. Notably, administration of the NMDAR antagonist, ketamine, to healthy human subjects has psychotogenic action, producing both positive and negative symptoms associated with schizophrenia. NMDARs have multiple subtypes, but the subtypes through which ketamine produces its psychotogenic effects are not known. Here we address this question using quantitative data that characterize ketamine's ability to block different NMDAR subtypes...
November 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27799918/magnetoencephalography-for-the-detection-of-intervention-effects-of-a-specific-nutrient-combination-in-patients-with-mild-alzheimer-s-disease-results-from-an-exploratory-double-blind-randomized-controlled-study
#18
Elisabeth C W van Straaten, Hanneke de Waal, Marieke M Lansbergen, Philip Scheltens, Fernando Maestu, Rafal Nowak, Arjan Hillebrand, Cornelis J Stam
Synaptic loss is an early pathological finding in Alzheimer's disease (AD) and correlates with memory impairment. Changes in macroscopic brain activity measured with electro- and magnetoencephalography (EEG and MEG) in AD indicate synaptic changes and may therefore serve as markers of intervention effects in clinical trials. EEG peak frequency and functional networks have shown, in addition to improved memory performance, to be sensitive to detect an intervention effect in mild AD patients of the medical food Souvenaid containing the specific nutrient combination Fortasyn(®) Connect, which is designed to enhance synapse formation and function...
2016: Frontiers in Neurology
https://www.readbyqxmd.com/read/27798290/medication-effects-on-eeg-biomarkers-in-attention-deficit-hyperactivity-disorder
#19
Havva Nuket Isiten, Merve Cebi, Bernis Sutcubasi Kaya, Baris Metin, Nevzat Tarhan
EEG biomarkers have become increasingly used to aid in diagnosis of attention-deficit/hyperactivity disorder (ADHD). Despite several studies suggesting that EEG theta/beta ratio may help discriminating ADHD from other disorders, the effect of medications on theta/beta ratio is not known. Forty-three children with ADHD that were evaluated with quantitative EEG before and after methylphenidate were included in the study. Theta/beta ratio, theta and beta powers for whole brain, central, and frontal areas were calculated...
October 25, 2016: Clinical EEG and Neuroscience: Official Journal of the EEG and Clinical Neuroscience Society (ENCS)
https://www.readbyqxmd.com/read/27792918/nutritive-sucking-induces-age-specific-eeg-changes-in-0-24-week-old-infants
#20
Johannes Lehtonen, Minna Valkonen-Korhonen, Stefanos Georgiadis, Mika P Tarvainen, Hanne Lappi, Juha-Pekka Niskanen, Ari Pääkkönen, Pasi A Karjalainen
Little is known how the brain of the newborn infant responds to the postnatal nutrition and care. No systematic studies exist in which the effects of nutritional and non-nutritional sucking on the brain activity of the infant were compared. We recorded the EEG activity of 40 infants at the ages of 0,6,12 and 24 weeks in four successive behavioral stages: while the infants were hungry and waiting for sucking, during non-nutritional and nutritional sucking, and during satiation after completed feeding. Quantitative EEG analysis was performed using occipital, parietal and central EEG channels...
October 25, 2016: Infant Behavior & Development
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