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Neural Oscillations

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https://www.readbyqxmd.com/read/28324930/rtms-enhanced-gamma-oscillation-through-strengthened-network-connection
#1
Mengmeng Dou, Xin Tian
Gamma oscillations emerge generally in working memory to aspect of higher cognitive functions, and typically with the interaction of brain network. How is gamma oscillatory activity influenced by the functional connection in the brain'a network? How can gamma oscillations be increased by neural modulation to result in potential benefits for working memory? The present study aims to investigate the intensity of gamma oscillations modulated by low frequency repetitive transcranial magnetic stimulation (rTMS), and the possible brain network mechanism of increased gamma oscillations during working memory task in rats...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324134/-between-psyche-and-brain-state-of-the-art-in-psychiatry
#2
T Fuchs
Since its development around 1800 psychiatry has been oscillating between the poles of the sciences and the humanities, being directed towards subjective experience on the one hand and towards the neural substrate on the other hand. Today, this dualism seems to have been overcome by a naturalism, which identifies subjective experience with neural processes, according to Griesinger's frequently quoted statement "mental diseases are brain diseases". The progress achieved by the neurobiological paradigm on the level of a fundamental science is in contrast to the tendency to isolate mental illnesses from the patients' social relationships and to neglect subjectivity and intersubjectivity in their explanation...
March 21, 2017: Der Nervenarzt
https://www.readbyqxmd.com/read/28323894/a-generalized-phase-resetting-method-for-phase-locked-modes-prediction
#3
Sorinel A Oprisan, Dave I Austin
We derived analytically and checked numerically a set of novel conditions for the existence and the stability of phase-locked modes in a biologically relevant master-slave neural network with a dynamic feedback loop. Since neural oscillators even in the three-neuron network investigated here receive multiple inputs per cycle, we generalized the concept of phase resetting to accommodate multiple inputs per cycle. We proved that the phase resetting produced by two or more stimuli per cycle can be recursively computed from the traditional, single stimulus, phase resetting...
2017: PloS One
https://www.readbyqxmd.com/read/28321433/transcription-factor-oscillations-in-neural-stem-cells-implications-for-accurate-control-of-gene-expression
#4
REVIEW
Pascal Bielefeld, Marijn Schouten, Paul J Lucassen, Carlos P Fitzsimons
Naturally occurring oscillations in glucocorticoids induce a cyclic activation of the glucocorticoid receptor (GR), a well-characterized ligand-activated transcription factor. These cycles of GR activation/deactivation result in rapid GR exchange at genomic response elements and GR recycling through the chaperone machinery, ultimately generating pulses of GR-mediated transcriptional activity of target genes. In a recent article we have discussed the implications of circadian and high-frequency (ultradian) glucocorticoid oscillations for the dynamic control of gene expression in hippocampal neural stem/progenitor cells (NSPCs) (Fitzsimons et al...
2017: Neurogenesis (Austin, Tex.)
https://www.readbyqxmd.com/read/28315312/eeg-oscillatory-power-dissociates-between-distress-and-depression-related-psychopathology-in-subjective-tinnitus
#5
Martin Meyer, Patrick Neff, Angelina Grest, Colette Hemsley, Steffi Weidt, Tobias Kleinjung
Recent research has used source estimation approaches to identify spatially distinct neural configurations in individuals with chronic, subjective tinnitus (TI). The results of these studies are often heterogeneous, a fact which may be partly explained by an inherent heterogeneity of/in the TI population and partly by the applied EEG data analysis procedure and EEG hardware. Hence this study was performed to re-enact a formerly published study (Joos et al., 2012) to better understand the reason for differences and overlap between studies from different labs...
March 14, 2017: Brain Research
https://www.readbyqxmd.com/read/28314445/where-does-eeg-come-from-and-what-does-it-mean
#6
REVIEW
Michael X Cohen
Electroencephalography (EEG) has been instrumental in making discoveries about cognition, brain function, and dysfunction. However, where do EEG signals come from and what do they mean? The purpose of this paper is to argue that we know shockingly little about the answer to this question, to highlight what we do know, how important the answers are, and how modern neuroscience technologies that allow us to measure and manipulate neural circuits with high spatiotemporal accuracy might finally bring us some answers...
March 14, 2017: Trends in Neurosciences
https://www.readbyqxmd.com/read/28298263/a-proof-of-principle-simulation-for-closed-loop-control-based-on-preexisting-experimental-thalamic-dbs-enhanced-instrumental-learning
#7
Ching-Fu Wang, Shih-Hung Yang, Sheng-Huang Lin, Po-Chuan Chen, Yu-Chun Lo, Han-Chi Pan, Hsin-Yi Lai, Lun-De Liao, Hui-Ching Lin, Hsu-Yan Chen, Wei-Chen Huang, Wun-Jhu Huang, You-Yin Chen
Deep brain stimulation (DBS) has been applied as an effective therapy for treating Parkinson's disease or essential tremor. Several open-loop DBS control strategies have been developed for clinical experiments, but they are limited by short battery life and inefficient therapy. Therefore, many closed-loop DBS control systems have been designed to tackle these problems by automatically adjusting the stimulation parameters via feedback from neural signals, which has been reported to reduce the power consumption...
February 24, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28290507/inhibitory-interneuron-circuits-at-cortical-and-spinal-levels-are-associated-with-individual-differences-in-corticomuscular-coherence-during-isometric-voluntary-contraction
#8
Ryosuke Matsuya, Junichi Ushiyama, Junichi Ushiba
Corticomuscular coherence (CMC) is an oscillatory synchronization of 15-35 Hz (β-band) between electroencephalogram (EEG) of the sensorimotor cortex and electromyogram of contracting muscles. Although we reported that the magnitude of CMC varies among individuals, the physiological mechanisms underlying this variation are still unclear. Here, we aimed to investigate the associations between CMC and intracortical inhibition (ICI) in the primary motor cortex (M1)/recurrent inhibition (RI) in the spinal cord, which probably affect oscillatory neural activities...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28289370/energetic-constraints-produce-self-sustained-oscillatory-dynamics-in-neuronal-networks
#9
Javier Burroni, P Taylor, Cassian Corey, Tengiz Vachnadze, Hava T Siegelmann
Overview: We model energy constraints in a network of spiking neurons, while exploring general questions of resource limitation on network function abstractly. Background: Metabolic states like dietary ketosis or hypoglycemia have a large impact on brain function and disease outcomes. Glia provide metabolic support for neurons, among other functions. Yet, in computational models of glia-neuron cooperation, there have been no previous attempts to explore the effects of direct realistic energy costs on network activity in spiking neurons...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28288909/oscillatory-eeg-dynamics-underlying-automatic-chunking-during-sentence-processing
#10
Corinna E Bonhage, Lars Meyer, Thomas Gruber, Angela D Friederici, Jutta L Mueller
Sentences are easier to remember than random word sequences, likely because linguistic regularities facilitate chunking of words into meaningful groups. The present electroencephalography study investigated the neural oscillations modulated by this so-called sentence superiority effect during the encoding and maintenance of sentence fragments versus word lists. We hypothesized a chunking-related modulation of neural processing during the encoding and retention of sentence fragments as compared to word lists...
March 10, 2017: NeuroImage
https://www.readbyqxmd.com/read/28287998/design-and-validation-of-a-virtual-player-for-studying-interpersonal-coordination-in-the-mirror-game
#11
Chao Zhai, Francesco Alderisio, Piotr Slowinski, Krasimira Tsaneva-Atanasova, Mario di Bernardo
The mirror game has been recently proposed as a simple, yet powerful paradigm for studying interpersonal interactions. It has been suggested that a virtual partner able to play the game with human subjects can be an effective tool to affect the underlying neural processes needed to establish the necessary connections between the players, and also to provide new clinical interventions for rehabilitation of patients suffering from social disorders. Inspired by the motor processes of the central nervous system (CNS) and the musculoskeletal system in the human body, in this paper we develop a novel interactive cognitive architecture based on nonlinear control theory to drive a virtual player (VP) to play the mirror game with a human player (HP) in different configurations...
March 7, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28286478/cortical-alpha-oscillations-predict-speech-intelligibility
#12
Andrew Dimitrijevic, Michael L Smith, Darren S Kadis, David R Moore
Understanding speech in noise (SiN) is a complex task involving sensory encoding and cognitive resources including working memory and attention. Previous work has shown that brain oscillations, particularly alpha rhythms (8-12 Hz) play important roles in sensory processes involving working memory and attention. However, no previous study has examined brain oscillations during performance of a continuous speech perception test. The aim of this study was to measure cortical alpha during attentive listening in a commonly used SiN task (digits-in-noise, DiN) to better understand the neural processes associated with "top-down" cognitive processing in adverse listening environments...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28286048/effect-of-age-on-cutaneous-vasomotor-responses-during-local-skin-heating
#13
Gary J Hodges, Matthew M Mallette, Garry A Tew, John M Saxton, James Moss, Alan D Ruddock, Markos Klonizakis
This study examined the effect of ageing on the low-frequency oscillations (vasomotion) of skin blood flow in response to local heating (LH). Skin blood flow was assessed by laser-Doppler flowmetry on the forearm at rest (33°C) and in response to LH of the skin to both 42°C and 44°C in 14 young (24±1years) and 14 older (64±1years) participants. Vasomotion was analyzed using a wavelet transform to investigate power of the frequency intervals associated with endothelial, neural, myogenic, respiratory, and cardiac activities of the laser-Doppler signal...
March 9, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28284849/attention-to-pain-a-neurocognitive-perspective-on-attentional-modulation-of-pain-in-neuroimaging-studies
#14
REVIEW
D M Torta, V Legrain, A Mouraux, E Valentini
Several studies have used neuroimaging techniques to investigate brain correlates of the attentional modulation of pain. Although these studies have advanced the knowledge in the field, important confounding factors such as imprecise theoretical definitions of attention, incomplete operationalization of the construct under exam, and limitations of techniques relying on measuring regional changes in cerebral blood flow have hampered the potential relevance of the conclusions. Here, we first provide an overview of the major theories of attention and of attention in the study of pain to bridge theory and experimental results...
January 23, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28274832/distinct-roles-of-theta-and-alpha-oscillations-in-the-involuntary-capture-of-goal-directed-attention
#15
Anthony M Harris, Paul E Dux, Caelyn N Jones, Jason B Mattingley
Mechanisms of attention assign priority to sensory inputs on the basis of current task goals. Previous studies have shown that lateralized neural oscillations within the alpha (8-14Hz) range are associated with the voluntary allocation of attention to the contralateral visual field. It is currently unknown, however, whether similar oscillatory signatures instantiate the involuntary capture of spatial attention by goal-relevant stimulus properties. Here we investigated the roles of theta (4-8Hz), alpha, and beta (14-30Hz) oscillations in human goal-directed visual attention...
March 6, 2017: NeuroImage
https://www.readbyqxmd.com/read/28271439/relation-of-visual-creative-imagery-manipulation-to-resting-state-brain-oscillations
#16
Yuxuan Cai, Delong Zhang, Bishan Liang, Zengjian Wang, Junchao Li, Zhenni Gao, Mengxia Gao, Song Chang, Bingqing Jiao, Ruiwang Huang, Ming Liu
Visual creative imagery (VCI) manipulation is the key component of visual creativity; however, it remains largely unclear how it occurs in the brain. The present study investigated the brain neural response to VCI manipulation and its relation to intrinsic brain activity. We collected functional magnetic resonance imaging (fMRI) datasets related to a VCI task and a control task as well as pre- and post-task resting states in sequential sessions. A general linear model (GLM) was subsequently used to assess the specific activation of the VCI task compared with the control task...
March 7, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28271041/the-cortical-signature-of-symptom-laterality-in-parkinson-s-disease
#17
Elizabeth Heinrichs-Graham, Pamela M Santamaria, Howard E Gendelman, Tony W Wilson
Patients with Parkinson's disease (PD) often present with unilateral motor symptoms that eventually spread to the other side. This symptom lateralization is diagnostically important, as it serves to distinguish PD from other motor disorders with overlapping symptom profiles. Further, recent studies have shown that the side of symptom onset is important for prognosis, as there are differences in the rate of disease progression and the incidence of secondary symptoms between right- and left-dominant (RD, LD) patients...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28269703/cross-entropy-optimization-for-neuromodulation
#18
Harleen K Brar, Yunpeng Pan, Babak Mahmoudi, Evangelos A Theodorou
This study presents a reinforcement learning approach for the optimization of the proportional-integral gains of the feedback controller represented in a computational model of epilepsy. The chaotic oscillator model provides a feedback control systems view of the dynamics of an epileptic brain with an internal feedback controller representative of the natural seizure suppression mechanism within the brain circuitry. Normal and pathological brain activity is simulated in this model by adjusting the feedback gain values of the internal controller...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269507/mining-cross-frequency-coupling-microstates-cfc%C3%AE-states-from-eeg-recordings-during-resting-state-and-mental-arithmetic-tasks
#19
Stavros I Dimitriadis, Yu Sun, Nitish Thakor, Anastasios Bezerianos
The functional brain connectivity has been studied by analyzing synchronization between dynamic oscillations of identical frequency or between different frequencies of distinct brain areas. It has been hypothesized that cross-frequency coupling (CFC) between different frequency bands is the carrier mechanism for the coordination of global and local neural processes and hence supports the distributed information processing in the brain. In the present study, we attempt to study the dynamic evolution of CFC at resting-state and during a mental task...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268456/emotion-classification-using-single-channel-scalp-eeg-recording
#20
Amir Jalilifard, Ednaldo Brigante Pizzolato, Md Kafiul Islam
Several studies have found evidence for corticolimbic Theta electroencephalographic (EEG) oscillation in the neural processing of visual stimuli perceived as fear or threatening scene. Recent studies showed that neural oscillations' patterns in Theta, Alpha, Beta and Gamma sub-bands play a main role in brain's emotional processing. The main goal of this study is to classify two different emotional states by means of EEG data recorded through a single-electrode EEG headset. Nineteen young subjects participated in an EEG experiment while watching a video clip that evoked three emotional states: neutral, relaxation and scary...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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