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https://www.readbyqxmd.com/read/28820903/prominent-facilitation-at-beta-and-gamma-frequency-range-revealed-with-physiological-calcium-concentration-in-adult-mouse-piriform-cortex-in-vitro
#1
Marie Gleizes, Simon P Perrier, Caroline Fonta, Lionel G Nowak
Neuronal activity is characterized by a diversity of oscillatory phenomena that are associated with multiple behavioral and cognitive processes, yet the functional consequences of these oscillations are not fully understood. Our aim was to determine whether and how these different oscillatory activities affect short-term synaptic plasticity (STP), using the olfactory system as a model. In response to odorant stimuli, the olfactory bulb displays a slow breathing rhythm as well as beta and gamma oscillations...
2017: PloS One
https://www.readbyqxmd.com/read/28811538/fine-structure-of-posterior-alpha-rhythm-in-human-eeg-frequency-components-their-cortical-sources-and-temporal-behavior
#2
Elham Barzegaran, Vladimir Y Vildavski, Maria G Knyazeva
Heterogeneity of the posterior alpha rhythm (AR) is a widely assumed but rarely tested phenomenon. We decomposed the posterior AR in the cortical source space with a 3-way PARAFAC technique, taking into account the spatial, frequency, and temporal aspects of mid-density EEG. We found a multicomponent AR structure in 90% of a group of 29 healthy adults. The typical resting-state structure consisted of a high-frequency occipito-parietal component of the AR (ARC1) and a low-frequency occipito-temporal component (ARC2), characterized by individual dynamics in time...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28798683/enhanced-gamma-activity-and-cross-frequency-interaction-of-resting-state-electroencephalographic-oscillations-in-patients-with-alzheimer-s-disease
#3
Jing Wang, Yuxing Fang, Xiao Wang, Huichao Yang, Xin Yu, Huali Wang
Cognitive impairment, functional decline and behavioral symptoms that characterize Alzheimer's disease (AD) are associated with perturbations of the neuronal network. The typical electroencephalographic (EEG) features in AD patients are increased delta or theta rhythm and decreased alpha or beta rhythm activities. However, considering the role of cross-frequency couplings in cognition, the alternation of cross-frequency couplings in AD patients is still obscure. This study aims to explore the interaction dynamics between different EEG oscillations in AD patients...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28798677/measurement-of-the-perception-of-control-during-continuous-movement-using-electroencephalography
#4
Wen Wen, Atsushi Yamashita, Hajime Asama
"Sense of control" refers to the subjective feeling of control over external events. Numerous neuropsychological studies have investigated the neural basis of the sense of control during action performance; however, most previous studies have focused on responses to a single discrete action outcome rather than real-time processing of action-outcome sequences. In the present study, we aimed to identify whether certain patterns of brain activation are associated with the perceived control during continuous movement...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28782904/role-of-olfactory-reactions-nociception-and-immunoendocrine-shifts-in-addictive-disorders
#5
Elena Masterova, Tatiana Nevidimova, Dariya Savochkina, Valentina Nikitina, Olga Lobacheva, Tamara Vetlugina, Nikolay Bokhan
BACKGROUND AND OBJECTIVES: Addictive pathology is associated with nervous, immune, and endocrine shifts. Meanwhile, the nature of intersystemic relationship lying beneath addictive disorders remains unclear. The purpose of the study was to identify neuroimmunoendocrine markers of addictive disorders in male subjects defining the nature of their interaction. METHODS: The study enrolled 69 subjects aged 18-43 years: 59 males and 10 females divided into those with addictive disorders (n = 39) and conditionally healthy subjects (n = 30)...
August 7, 2017: American Journal on Addictions
https://www.readbyqxmd.com/read/28780133/altered-glua1-gria1-function-and-accumbal-synaptic-plasticity-in-the-clock%C3%AE-19-model-of-bipolar-mania
#6
Puja K Parekh, Darius Becker-Krail, Poornima Sundaravelu, Shinsuke Ishigaki, Haruo Okado, Gen Sobue, Yanhua Huang, Colleen A McClung
BACKGROUND: Disruptions in circadian rhythms are associated with an increased risk for bipolar disorder. Moreover, studies show that the circadian protein CLOCK (circadian locomotor output cycles kaput) is involved in regulating monoaminergic systems and mood-related behavior. However, the molecular and synaptic mechanisms underlying this relationship remain poorly understood. METHODS: Using ex vivo whole-cell patch-clamp electrophysiology in ClockΔ19 mutant and wild-type mice we characterized alterations in excitatory synaptic transmission, strength, and intrinsic excitability of nucleus accumbens (NAc) neurons...
June 27, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/28752060/sleep-onset-uncovers-thalamic-abnormalities-in-patients-with-idiopathic-generalised-epilepsy
#7
Andrew P Bagshaw, Joanne R Hale, Brunno M Campos, David T Rollings, Rebecca S Wilson, Marina K M Alvim, Ana Carolina Coan, Fernando Cendes
The thalamus is crucial for sleep regulation and the pathophysiology of idiopathic generalised epilepsy (IGE), and may serve as the underlying basis for the links between the two. We investigated this using EEG-fMRI and a specific emphasis on the role and functional connectivity (FC) of the thalamus. We defined three types of thalamic FC: thalamocortical, inter-hemispheric thalamic, and intra-hemispheric thalamic. Patients and controls differed in all three measures, and during wakefulness and sleep, indicating disorder-dependent and state-dependent modification of thalamic FC...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28739525/state-dependent-alpha-peak-frequency-shifts-experimental-evidence-potential-mechanisms-and-functional-implications
#8
REVIEW
Andreas Mierau, Wolfgang Klimesch, Jérémie Lefebvre
Neural populations produce complex oscillatory patterns thought to implement brain function. The dominant rhythm in the healthy adult human brain is formed by alpha oscillations with a typical power peak most commonly found between 8 and 12Hz. This alpha peak frequency has been repeatedly discussed as a highly heritable and stable neurophysiological "trait" marker reflecting anatomical properties of the brain, and individuals' general cognitive capacity. However, growing evidence suggests that the alpha peak frequency is highly volatile at shorter time scales, dependent on the individuals' "state"...
July 22, 2017: Neuroscience
https://www.readbyqxmd.com/read/28729830/resting-state-fluctuations-of-eeg-sensorimotor-rhythm-reflect-bold-activities-in-the-pericentral-areas-a-simultaneous-eeg-fmri-study
#9
Shohei Tsuchimoto, Shuka Shibusawa, Nobuaki Mizuguchi, Kenji Kato, Hiroki Ebata, Meigen Liu, Takashi Hanakawa, Junichi Ushiba
Blockade of the scalp electroencephalographic (EEG) sensorimotor rhythm (SMR) is a well-known phenomenon following attempted or executed motor functions. Such a frequency-specific power attenuation of the SMR occurs in the alpha and beta frequency bands and is spatially registered at primary somatosensory and motor cortices. Here, we hypothesized that resting-state fluctuations of the SMR in the alpha and beta frequency bands also covary with resting-state sensorimotor cortical activity, without involving task-related neural dynamics...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28716529/the-pro-inflammatory-cytokines-salivary-cortisol-and-alpha-amylase-are-associated-with-generalized-anxiety-disorder-gad-in-patients-with-asthma
#10
Chang-Jiang Yang, Di Liu, Zhen-Sheng Xu, Shen-Xun Shi, Yi-Jie Du
Generalized anxiety disorder (GAD) is common in patients with asthma. High levels of GAD may lead both to exacerbation of the condition and poor management. However, the physiological mechanisms of GAD in asthma patient is unclear. This study investigated the associations between the diurnal rhythm of sputum cytokines, salivary cortisol, α-amylase and GAD in asthma patients. Patients with co-morbid GAD and asthma showed higher sputum IL-1 AUC, sputum IL-6 AUC and sAA AUC. And there were positive correlations between Hamilton anxiety scale (HAMA) scores and sputum IL-1 AUC concentrations (r=0...
July 14, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28698376/frequency-specific-directed-interactions-in-the-human-brain-network-for-language
#11
Jan-Mathijs Schoffelen, Annika Hultén, Nietzsche Lam, André F Marquand, Julia Uddén, Peter Hagoort
The brain's remarkable capacity for language requires bidirectional interactions between functionally specialized brain regions. We used magnetoencephalography to investigate interregional interactions in the brain network for language while 102 participants were reading sentences. Using Granger causality analysis, we identified inferior frontal cortex and anterior temporal regions to receive widespread input and middle temporal regions to send widespread output. This fits well with the notion that these regions play a central role in language processing...
July 25, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28694855/the-effects-of-sweet-bitter-salty-and-sour-stimuli-on-alpha-rhythm-a-meg-study
#12
Athanasia Kotini, Photios Anninos, Triandafillos Gemousakakis, Adam Adamopoulos
OBJECTIVE: the possible diff erences in processing gustatory stimuli in healthy subjects was investigated by magnetoencephalography (meg). MATHERIAL AND METHOD: meg recordings were evaluated for 10 healthy volunteers (3 men within the age range 20-46 years, 7 women within the age range 10-28 years), with four diff erent gustatory stimuli: sweet, bi" er, sour and salty. Fast fourier transform was performed on meg epochs recorded for the above conditions and the eff ect of each kind of stimuli on alpha rhythm was examined...
September 2016: Mædica
https://www.readbyqxmd.com/read/28692340/salivary-cortisol-and-alpha-amylase-is-there-consistency-between-psychosocial-stress-test-and-burdensome-work-shifts
#13
Kati Karhula, Mikko Härmä, Mikael Sallinen, Harri Lindholm, Ari Hirvonen, Marko Elovainio, Mika Kivimäki, Jussi Vahtera, Sampsa Puttonen
This study examined the consistency of salivary cortisol and alpha-amylase (sAA) total daily secretion between laboratory and field circumstances. The 95 participants were shift working female health care professionals with high (n = 53) or low (n = 42) psychosocial stress (job strain) measured by the Job Content Questionnaire (JCQ). The Trier Social Stress Test including a 5-minute free speech and a mental arithmetic task was conducted with four, and field measurements with three daily saliva samples of cortisol and sAA during circadian rhythm and inter-shift recovery controlled morning shift, night shift, and a day off...
July 10, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28688548/eeg-activity-as-an-objective-measure-of-cognitive-load-during-effortful-listening-a-study-on-pediatric-subjects-with-bilateral-asymmetric-sensorineural-hearing-loss
#14
Pasquale Marsella, Alessandro Scorpecci, Giulia Cartocci, Sara Giannantonio, Anton Giulio Maglione, Isotta Venuti, Ambra Brizi, Fabio Babiloni
OBJECTIVES: Deaf subjects with hearing aids or cochlear implants generally find it challenging to understand speech in noisy environments where a great deal of listening effort and cognitive load are invested. In prelingually deaf children, such difficulties may have detrimental consequences on the learning process and, later in life, on academic performance. Despite the importance of such a topic, currently, there is no validated test for the assessment of cognitive load during audiological tasks...
August 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28674650/an-adaptive-singular-spectrum-analysis-method-for-extracting-brain-rhythms-of-electroencephalography
#15
Hai Hu, Shengxin Guo, Ran Liu, Peng Wang
Artifacts removal and rhythms extraction from electroencephalography (EEG) signals are important for portable and wearable EEG recording devices. Incorporating a novel grouping rule, we proposed an adaptive singular spectrum analysis (SSA) method for artifacts removal and rhythms extraction. Based on the EEG signal amplitude, the grouping rule determines adaptively the first one or two SSA reconstructed components as artifacts and removes them. The remaining reconstructed components are then grouped based on their peak frequencies in the Fourier transform to extract the desired rhythms...
2017: PeerJ
https://www.readbyqxmd.com/read/28659769/propofol-sevoflurane-and-ketamine-induce-a-reversible-increase-in-delta-gamma-and-theta-gamma-phase-amplitude-coupling-in-frontal-cortex-of-rat
#16
Dinesh Pal, Brian H Silverstein, Lana Sharba, Duan Li, Viviane S Hambrecht-Wiedbusch, Anthony G Hudetz, George A Mashour
Studies from human and non-human species have demonstrated a breakdown of functional corticocortical connectivity during general anesthesia induced by anesthetics with diverse molecular, neurophysiological, and pharmacological profiles. Recent studies have demonstrated that changes in long-range neural communication, and by corollary, functional connectivity, might be influenced by cross-frequency coupling (CFC) between the phase of slow oscillations and the amplitude of local fast oscillations. Phase-amplitude coupling (PAC) between slow oscillations and alpha rhythm during general anesthesia reveal distinct patterns depending on the anesthetic...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28655938/significance-of-high-frequency-electrical-brain-activity
#17
REVIEW
Katsuhiro Kobayashi, Tomoyuki Akiyama, Takashi Agari, Tatsuya Sasaki, Takashi Shibata, Yoshiyuki Hanaoka, Mari Akiyama, Fumika Endoh, Makio Oka, Isao Date
 Electroencephalogram (EEG) data include broadband electrical brain activity ranging from infra-slow bands (< 0.1 Hz) to traditional frequency bands (e.g., the approx. 10 Hz alpha rhythm) to high-frequency bands of up to 500 Hz. High-frequency oscillations (HFOs) including ripple and fast ripple oscillations (80-200 Hz and>200 / 250 Hz, respectively) are particularly of note due to their very close relationship to epileptogenicity, with the possibility that they could function as a surrogate biomarker of epileptogenicity...
June 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28654081/aging-affects-the-balance-of-neural-entrainment-and-top-down-neural-modulation-in-the-listening-brain
#18
Molly J Henry, Björn Herrmann, Dunja Kunke, Jonas Obleser
Healthy aging is accompanied by listening difficulties, including decreased speech comprehension, that stem from an ill-understood combination of sensory and cognitive changes. Here, we use electroencephalography to demonstrate that auditory neural oscillations of older adults entrain less firmly and less flexibly to speech-paced (∼3 Hz) rhythms than younger adults' during attentive listening. These neural entrainment effects are distinct in magnitude and origin from the neural response to sound per se...
June 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28630468/neurofeedback-learning-modifies-the-incidence-rate-of-alpha-spindles-but-not-their-duration-and-amplitude
#19
Alexei Ossadtchi, Tatiana Shamaeva, Elizaveta Okorokova, Victoria Moiseeva, Mikhail A Lebedev
Although the first experiments on alpha-neurofeedback date back nearly six decades ago, when Joseph Kamiya reported successful operant conditioning of alpha-rhythm in humans, the effectiveness of this paradigm in various experimental and clinical settings is still a matter of debate. Here, we investigated the changes in EEG patterns during a continuously administered neurofeedback of P4 alpha activity. Two days of neurofeedback training were sufficient for a significant increase in the alpha power to occur...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630252/alpha-band-brain-oscillations-shape-the-processing-of-perceptible-as-well-as-imperceptible-somatosensory-stimuli-during-selective-attention
#20
Norman Forschack, Till Nierhaus, Matthias M Müller, Arno Villringer
Attention filters and weights sensory information according to behavioral demands. Stimulus-related neural responses are increased for the attended stimulus. Does alpha-band activity mediate this effect and is it restricted to conscious sensory events (suprathreshold), or does it also extend to unconscious stimuli (subthreshold)? To address these questions, we recorded EEG in healthy male and female volunteers undergoing subthreshold and suprathreshold somatosensory electrical stimulation to the left or right index finger...
July 19, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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