keyword
MENU ▼
Read by QxMD icon Read
search

neural synchronization

keyword
https://www.readbyqxmd.com/read/28334851/the-modulatory-effect-of-adaptive-deep-brain-stimulation-on-beta-bursts-in-parkinson-s-disease
#1
Gerd Tinkhauser, Alek Pogosyan, Simon Little, Martijn Beudel, Damian M Herz, Huiling Tan, Peter Brown
Adaptive deep brain stimulation uses feedback about the state of neural circuits to control stimulation rather than delivering fixed stimulation all the time, as currently performed. In patients with Parkinson's disease, elevations in beta activity (13-35 Hz) in the subthalamic nucleus have been demonstrated to correlate with clinical impairment and have provided the basis for feedback control in trials of adaptive deep brain stimulation. These pilot studies have suggested that adaptive deep brain stimulation may potentially be more effective, efficient and selective than conventional deep brain stimulation, implying mechanistic differences between the two approaches...
February 13, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28334187/individual-differences-in-human-auditory-processing-insights-from-single-trial-auditory-midbrain-activity-in-an-animal-model
#2
Travis White-Schwoch, Trent Nicol, Catherine M Warrier, Daniel A Abrams, Nina Kraus
Auditory-evoked potentials are classically defined as the summations of synchronous firing along the auditory neuraxis. Converging evidence supports a model whereby timing jitter in neural coding compromises listening and causes variable scalp-recorded potentials. Yet the intrinsic noise of human scalp recordings precludes a full understanding of the biological origins of individual differences in listening skills. To delineate the mechanisms contributing to these phenomena, in vivo extracellular activity was recorded from inferior colliculus in guinea pigs to speech in quiet and noise...
October 5, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/28334126/heartfelt-self-cardio-visual-integration-affects-self-face-recognition-and-interoceptive-cortical-processing
#3
Alejandra Sel, Ruben T Azevedo, Manos Tsakiris
The sense of body-ownership relies on the representation of both interoceptive and exteroceptive signals coming from one's body. However, it remains unknown how the integration of bodily signals coming from "outside" and "inside" the body is instantiated in the brain. Here, we used a modified version of the Enfacement Illusion to investigate whether the integration of visual and cardiac information can alter self-face recognition (Experiment 1) and neural responses to heartbeats (Experiment 2). We projected a pulsing shade, that was synchronous or asynchronous with the participant's heartbeat, onto a picture depicting the participant's face morphed with the face of an unfamiliar other...
October 5, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/28326027/accessible-neurobehavioral-anger-related-markers-for-vulnerability-to-post-traumatic-stress-symptoms-in-a-population-of-male-soldiers
#4
Tamar Lin, Gadi Gilam, Gal Raz, Ayelet Or-Borichev, Yair Bar-Haim, Eyal Fruchter, Talma Hendler
Identifying vulnerable individuals prone to develop post-traumatic stress symptoms (PTSS) is of paramount importance, especially in populations at high risk for stress exposure such as combat soldiers. While several neural and psychological risk factors are known, no post-traumatic stress disorder (PTSD) biomarker has yet progressed to clinical use. Here we present novel and clinically applicable anger-related neurobehavioral risk markers for military-related PTSS in a large cohort of Israeli soldiers. The psychological, electrophysiological and neural (Simultaneous recording of scalp electroencephalography [EEG] and functional magnetic resonance imaging [fMRI]) reaction to an anger-inducing film were measured prior to advanced military training and PTSS were recorded at 1-year follow-up...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28324930/rtms-enhanced-gamma-oscillation-through-strengthened-network-connection
#5
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/28322793/temporal-relation-between-neural-activity-and-neurite-pruning-on-a-numerical-model-and-a-microchannel-device-with-micro-electrode-array
#6
Yohei Kondo, Yuichiro Yada, Tatsuya Haga, Yuzo Takayama, Takuya Isomura, Yasuhiko Jimbo, Osamu Fukayama, Takayuki Hoshino, Kunihiko Mabuchi
Synapse elimination and neurite pruning are essential processes for the formation of neuronal circuits. These regressive events depend on neural activity and occur in the early postnatal days known as the critical period, but what makes this temporal specificity is not well understood. One possibility is that the neural activities during the developmentally regulated shift of action of GABA inhibitory transmission lead to the critical period. Moreover, it has been reported that the shifting action of the inhibitory transmission on immature neurons overlaps with synapse elimination and neurite pruning and that increased inhibitory transmission by drug treatment could induce temporal shift of the critical period...
March 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28320679/synchronization-of-coupled-reaction-diffusion-neural-networks-with-directed-topology-via-an-adaptive-approach
#7
Hao Zhang, Yin Sheng, Zhigang Zeng
This paper investigates the synchronization issue of coupled reaction-diffusion neural networks with directed topology via an adaptive approach. Due to the complexity of the network structure and the presence of space variables, it is difficult to design proper adaptive strategies on coupling weights to accomplish the synchronous goal. Under the assumptions of two kinds of special network structures, that is, directed spanning path and directed spanning tree, some novel edge-based adaptive laws, which utilized the local information of node dynamics fully are designed on the coupling weights for reaching synchronization...
March 15, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28316842/neural-energy-supply-consumption-properties-based-on-hodgkin-huxley-model
#8
Yihong Wang, Rubin Wang, Xuying Xu
Electrical activity is the foundation of the neural system. Coding theories that describe neural electrical activity by the roles of action potential timing or frequency have been thoroughly studied. However, an alternative method to study coding questions is the energy method, which is more global and economical. In this study, we clearly defined and calculated neural energy supply and consumption based on the Hodgkin-Huxley model, during firing action potentials and subthreshold activities using ion-counting and power-integral model...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28316771/disconnection-from-others-in-autism-is-more-than-just-a-feeling-whole-brain-neural-synchrony-in-adults-during-implicit-processing-of-emotional-faces
#9
Rocco Mennella, Rachel C Leung, Margot J Taylor, Benjamin T Dunkley
BACKGROUND: Socio-emotional difficulties in autism spectrum disorder (ASD) are thought to reflect impaired functional connectivity within the "social brain". Nonetheless, a whole-brain characterization of the fast responses in functional connectivity during implicit processing of emotional faces in adults with ASD is lacking. METHODS: The present study used magnetoencephalography to investigate early responses in functional connectivity, as measured by interregional phase synchronization, during implicit processing of angry, neutral and happy faces...
2017: Molecular Autism
https://www.readbyqxmd.com/read/28316753/a-resting-eeg-study-of-neocortical-hyperexcitability-and-altered-functional-connectivity-in-fragile-x-syndrome
#10
Jun Wang, Lauren E Ethridge, Matthew W Mosconi, Stormi P White, Devin K Binder, Ernest V Pedapati, Craig A Erickson, Matthew J Byerly, John A Sweeney
BACKGROUND: Cortical hyperexcitability due to abnormal fast-spiking inhibitory interneuron function has been documented in fmr1 KO mice, a mouse model of the fragile X syndrome which is the most common single gene cause of autism and intellectual disability. METHODS: We collected resting state dense-array electroencephalography data from 21 fragile X syndrome (FXS) patients and 21 age-matched healthy participants. RESULTS: FXS patients exhibited greater gamma frequency band power, which was correlated with social and sensory processing difficulties...
2017: Journal of Neurodevelopmental Disorders
https://www.readbyqxmd.com/read/28306273/chaos-and-correlated-avalanches-in-excitatory-neural-networks-with-synaptic-plasticity
#11
Fabrizio Pittorino, Miguel Ibáñez-Berganza, Matteo di Volo, Alessandro Vezzani, Raffaella Burioni
A collective chaotic phase with power law scaling of activity events is observed in a disordered mean field network of purely excitatory leaky integrate-and-fire neurons with short-term synaptic plasticity. The dynamical phase diagram exhibits two transitions from quasisynchronous and asynchronous regimes to the nontrivial, collective, bursty regime with avalanches. In the homogeneous case without disorder, the system synchronizes and the bursty behavior is reflected into a period doubling transition to chaos for a two dimensional discrete map...
March 3, 2017: Physical Review Letters
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
#12
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/28288865/retinal-npy-and-5-ht-inputs-to-the-aged-suprachiasmatic-nucleus-in-common-marmosets-callithrix-jacchus
#13
Rovena C G J Engelberth, Kayo D de Azevedo Silva, Felipe Porto Fiuza, Joacil Germano Soares, Miriam S M O Costa, Ruthnaldo R de Melo Lima, Expedito Silva do Nascimento, José R Dos Santos, José R L P Cavalcanti, Jeferson S Cavalcante
The circadian timing system (CTS) anticipates optimal physiological patterns in response to environmental fluctuations, such as light-dark cycle. Since age-related disruption of circadian synchronization is linked to several pathological conditions, we characterized alterations of neurochemical constituents and retinal projections to the major pacemaker of CTS, the suprachiasmatic nucleus (SCN), in adult and aged marmosets. We used intraocular injections of neural tracer Cholera toxin b (CTb) to report age-related reductions in CTb, neuropeptide Y and serotonin immunoreactivities...
March 10, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28286478/cortical-alpha-oscillations-predict-speech-intelligibility
#14
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/28285033/listening-to-a-baby-crying-induces-higher-electroencephalographic-synchronization-among-prefrontal-temporal-and-parietal-cortices-in-adoptive-mothers
#15
M Pérez-Hernández, M Hernández-González, R M Hidalgo-Aguirre, C Amezcua-Gutiérrez, M A Guevara
Women who adopt babies show caring behaviors and respond to stimuli from their infants just as biological mothers do, but several studies have shown that the cerebral functionality of biological mothers (BM) and adoptive mothers (AM) changes in relation to the type and emotional mean of the stimuli they receive from their babies. The complex perception and processing of different stimuli with emotional content (such as those emitted by babies) require functional synchronization among different cortical and subcortical brain areas...
March 9, 2017: Infant Behavior & Development
https://www.readbyqxmd.com/read/28284802/teams-on-the-same-wavelength-perform-better-inter-brain-phase-synchronization-constitutes-a-neural-substrate-for-social-facilitation
#16
Caroline Szymanski, Ana Pesquita, Allison A Brennan, Dionysios Perdikis, James T Enns, Timothy R Brick, Viktor Müller, Ulman Lindenberger
Working together feels easier with some people than with others. We asked participants to perform a visual search task either alone or with a partner while simultaneously measuring each participant's EEG. Local phase synchronization and inter-brain phase synchronization were generally higher when subjects jointly attended to a visual search task than when they attended to the same task individually. Some participants searched the visual display more efficiently and made faster decisions when working as a team, whereas other dyads did not benefit from working together...
March 9, 2017: NeuroImage
https://www.readbyqxmd.com/read/28272421/eeg-frequency-tagging-dissociates-between-neural-processing-of-motion-synchrony-and-human-quality-of-multiple-point-light-dancers
#17
Nihan Alp, Andrey R Nikolaev, Johan Wagemans, Naoki Kogo
Do we perceive a group of dancers moving in synchrony differently from a group of drones flying in-sync? The brain has dedicated networks for perception of coherent motion and interacting human bodies. However, it is unclear to what extent the underlying neural mechanisms overlap. Here we delineate these mechanisms by independently manipulating the degree of motion synchrony and the humanoid quality of multiple point-light displays (PLDs). Four PLDs moving within a group were changing contrast in cycles of fixed frequencies, which permits the identification of the neural processes that are tagged by these frequencies...
March 8, 2017: Scientific Reports
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/28269649/understanding-the-role-of-astrocytic-gaba-in-simulated-neural-networks
#19
Kerstin Lenk, Eero Raisanen, Jari A K Hyttinen
Astrocytes actively influence the behavior of the surrounding neuronal network including changes of the synaptic plasticity and neuronal excitability. These dynamics are altered in diseases like Alzheimer's, where the release of the gliotransmitter GABA is increased by affected, so called reactive astrocytes. In this paper, we aim to simulate a neural network with altered astrocytic GABA release. Therefore, we use our developed neuron-astrocyte model, called INEXA, which includes astrocyte controlled tripartite synapses and the astrocyte-astrocyte interaction...
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
#20
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
keyword
keyword
30866
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"