keyword
MENU ▼
Read by QxMD icon Read
search

gamma oscillations

keyword
https://www.readbyqxmd.com/read/28653279/chronic-paroxetine-treatment-prevents-the-emergence-of-abnormal-electroencephalogram-oscillations-in-huntington-s-disease-mice
#1
Sandor Kantor, Janos Varga, Shreya Kulkarni, A Jennifer Morton
Disturbance of rapid eye movement (REM) sleep appears early in both patients with Huntington's disease (HD) and mouse models of HD. Selective serotonin reuptake inhibitors are widely prescribed for patients with HD, and are also known to suppress REM sleep in healthy subjects. To test whether selective serotonin reuptake inhibitors can correct abnormal REM sleep and sleep-dependent brain oscillations in HD mice, we treated wild-type and symptomatic R6/2 mice acutely with vehicle and paroxetine (5, 10, and 20 mg/kg)...
June 26, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28642686/transcranial-random-noise-stimulation-trns-shapes-the-processing-of-rapidly-changing-auditory-information
#2
Katharina S Rufener, Philipp Ruhnau, Hans-Jochen Heinze, Tino Zaehle
Neural oscillations in the gamma range are the dominant rhythmic activation pattern in the human auditory cortex. These gamma oscillations are functionally relevant for the processing of rapidly changing acoustic information in both speech and non-speech sounds. Accordingly, there is a tight link between the temporal resolution ability of the auditory system and inherent neural gamma oscillations. Transcranial random noise stimulation (tRNS) has been demonstrated to specifically increase gamma oscillation in the human auditory cortex...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28640508/intraglomerular-gap-junctions-enhance-interglomerular-synchrony-in-a-sparsely-connected-olfactory-bulb-network
#3
Frederic Pouille, Thomas S McTavish, Lawrence E Hunter, Diego Restrepo, Nathan E Schoppa
A dominant feature of the olfactory bulb response to odour is fast synchronized oscillations at beta (15-40 Hz) or gamma (40-90 Hz) frequencies, thought to be involved in integration of olfactory signals. Mechanistically, the bulb presents an interesting case study for understanding how beta/gamma oscillations arise. Fast oscillatory synchrony in the activity of output mitral cells (MCs) appears to result from interactions with GABAergic granule cells (GCs), yet the incidence of MC-GC connections is very low, around 4%...
June 22, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28638715/rat-intersubjective-decisions-are-encoded-by-frequency-specific-oscillatory-contexts
#4
Jana Schaich Borg, Sanvesh Srivastava, Lizhen Lin, Joseph Heffner, David Dunson, Kafui Dzirasa, Luis de Lecea
INTRODUCTION: It is unknown how the brain coordinates decisions to withstand personal costs in order to prevent other individuals' distress. Here we test whether local field potential (LFP) oscillations between brain regions create "neural contexts" that select specific brain functions and encode the outcomes of these types of intersubjective decisions. METHODS: Rats participated in an "Intersubjective Avoidance Test" (IAT) that tested rats' willingness to enter an innately aversive chamber to prevent another rat from getting shocked...
June 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28626018/dissecting-the-function-of-hippocampal-oscillations-in-a-human-anxiety-model
#5
Saurabh Khemka, Gareth Barnes, Raymond J Dolan, Dominik R Bach
Neural oscillations in hippocampus and medial prefrontal cortex (mPFC) are a hallmark of rodent anxiety models that build on conflict between approach and avoidance. Yet, the function of these oscillations, and their expression in humans, remain elusive. Here, we used magnetoencephalography (MEG) to investigate neural oscillations in a task that simulated approach-avoidance conflict, wherein 23 male and female human participants collected monetary tokens under a threat of virtual predation. Probability of threat was learned beforehand by direct experience...
June 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28624646/instantaneous-voltage-as-an-alternative-to-power-and-phase-based-interpretation-of-oscillatory-brain-activity
#6
Gerwin Schalk, Joshua Marple, Robert T Knight, William G Coon
For decades, oscillatory brain activity has been characterized primarily by measurements of power and phase. While many studies have linked those measurements to cortical excitability, their relationship to each other and to the physiological underpinnings of excitability is unclear. The recently proposed Function-through-Biased-Oscillations (FBO) hypothesis (Schalk, 2015a, 2015b) addressed these issues by suggesting that the voltage potential at the cortical surface directly reflects the excitability of cortical populations, that this voltage is rhythmically driven away from a low resting potential (associated with depolarized cortical populations) towards positivity (associated with hyperpolarized cortical populations)...
June 15, 2017: NeuroImage
https://www.readbyqxmd.com/read/28620295/slow-and-fast-neocortical-oscillations-in-the-senescence-accelerated-mouse-model-samp8
#7
Patricia Castano-Prat, Maria Perez-Zabalza, Lorena Perez-Mendez, Rosa M Escorihuela, Maria V Sanchez-Vives
The senescence-accelerated mouse prone 8 (SAMP8) model is characterized by accelerated, progressive cognitive decline as well as Alzheimer's disease (AD)-like neurodegenerative changes, and resembles the etiology of multicausal, sporadic late-onset/age-related AD in humans. Our aim was to find whether these AD-like pathological features, together with the cognitive deficits present in the SAMP8 strain, are accompanied by disturbances in cortical network activity with respect to control mice (SAM resistance 1, SAMR1) and, if so, how the alterations in cortical activity progress with age...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28608960/theta-band-power-increases-in-the-posterior-hippocampus-predict-successful-episodic-memory-encoding-in-humans
#8
Jui Jui Lin, Michael Rugg, Sandhitsu Das, Joel Stein, Daniel Rizzuto, Michael Kahana, Bradley Lega
Functional differences in the anterior and posterior hippocampus during episodic memory processing have not been examined in human electrophysiological data. This is in spite of strong evidence for such differences in rodent data, including greater place cell specificity in the dorsal hippocampus, greater sensitivity to the aversive or motivational content of memories in ventral regions, connectivity analyses identifying preferential ventral hippocampal connections with the amygdala, and gene expression analyses identifying a dorsal-ventral gradient...
June 13, 2017: Hippocampus
https://www.readbyqxmd.com/read/28592697/top-down-beta-enhances-bottom-up-gamma
#9
Craig G Richter, William H Thompson, Conrado A Bosman, Pascal Fries
Several recent studies have demonstrated that the bottom-up signaling of a visual stimulus is subserved by interareal gamma-band synchronization, whereas top-down influences are mediated by alpha-beta band synchronization. These processes may implement top-down control of stimulus processing if top-down and bottom-up mediating rhythms are coupled via cross-frequency interaction. To test this possibility, we investigated Granger-causal influences among awake male macaque primary visual area V1, higher visual area V4 and parietal control area 7a during attentional task performance...
June 7, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28592690/dynamics-of-human-subthalamic-neuron-phase-locking-to-motor-and-sensory-cortical-oscillations-during-movement
#10
Witold J Lipski, Thomas A Wozny, Ahmad Alhourani, Efstathios Kondylis, Robert S Turner, Donald J Crammond, Robert Mark Richardson
Coupled oscillatory activity recorded between sensorimotor regions of the basal ganglia-thalamocortical loop is thought to reflect information transfer relevant to movement. A neuronal firing-rate model of basal ganglia-thalamocortical circuitry, however, has dominated thinking about basal ganglia function for the past three decades, without knowledge of the relationship between basal ganglia single neuron firing and cortical population activity during movement itself. We recorded activity from 34 subthalamic nucleus (STN) neurons, simultaneously with cortical local field potentials and motor output, in eleven subjects with Parkinson's disease (PD) undergoing awake deep brain stimulator lead placement...
June 7, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28591796/histamine-enhances-theta-coupled-spiking-and-gamma-oscillations-in-the-medial-entorhinal-cortex-consistent-with-successful-spatial-recognition
#11
Quanhui Chen, Fenlan Luo, Faguo Yue, Jianxia Xia, Qin Xiao, Xiang Liao, Jun Jiang, Jun Zhang, Bo Hu, Dong Gao, Chao He, Zhian Hu
Encoding of spatial information in the superficial layers of the medial entorhinal cortex (sMEC) involves theta-modulated spiking and gamma oscillations, as well as spatially tuned grid cells and border cells. Little is known about the role of the arousal-promoting histaminergic system in the modification of information encoded in the sMEC in vivo, and how such histamine-regulated information correlates with behavioral functions. Here, we show that histamine upregulates the neural excitability of a significant proportion of neurons (16...
June 7, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28582479/restless-rest-intrinsic-sensory-hyperactivity-and-disinhibition-in-post-traumatic-stress-disorder
#12
Kevin Clancy, Mingzhou Ding, Edward Bernat, Norman B Schmidt, Wen Li
Post-traumatic stress disorder is characterized by exaggerated threat response, and theoretical accounts to date have focused on impaired threat processing and dysregulated prefrontal-cortex-amygdala circuitry. Nevertheless, evidence is accruing for broad, threat-neutral sensory hyperactivity in post-traumatic stress disorder. As low-level, sensory processing impacts higher-order operations, such sensory anomalies can contribute to widespread dysfunctions, presenting an additional aetiological mechanism for post-traumatic stress disorder...
June 3, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28580823/ethanol-and-the-developing-brain-inhibition-of-neuronal-activity-and-neuroapoptosis
#13
Nailya Lotfullina, Roustem Khazipov
Ethanol induces massive neuroapoptosis in the developing brain. One of the main hypotheses that has been put forward to explain the deleterious actions of ethanol in the immature brain involves an inhibition of neuronal activity. Here, we review recent evidence for this hypothesis obtained in the somatosensory cortex and hippocampus of neonatal rodents. In both structures, ethanol strongly inhibits brain activity. At the doses inducing massive neuroapoptosis, ethanol completely suppresses the early activity patterns of spindle-bursts and gamma oscillations in the neocortex and the early sharp-waves in the hippocampus...
June 1, 2017: Neuroscientist: a Review Journal Bringing Neurobiology, Neurology and Psychiatry
https://www.readbyqxmd.com/read/28579945/lfp-oscillations-in-the-mesencephalic-locomotor-region-during-voluntary-locomotion
#14
Brian R Noga, Francisco J Sanchez, Luz M Villamil, Christopher O'Toole, Stefan Kasicki, Maciej Olszewski, Anna M Cabaj, Henryk Majczyński, Urszula Sławińska, Larry M Jordan
Oscillatory rhythms in local field potentials (LFPs) are thought to coherently bind cooperating neuronal ensembles to produce behaviors, including locomotion. LFPs recorded from sites that trigger locomotion have been used as a basis for identification of appropriate targets for deep brain stimulation (DBS) to enhance locomotor recovery in patients with gait disorders. Theta band activity (6-12 Hz) is associated with locomotor activity in locomotion-inducing sites in the hypothalamus and in the hippocampus, but the LFPs that occur in the functionally defined mesencephalic locomotor region (MLR) during locomotion have not been determined...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28579129/theta-gamma-coupling-in-hippocampus-during-working-memory-deficits-induced-by-low-frequency-electromagnetic-field-exposure
#15
Yameng Zhang, Yan Zhang, Hejuan Yu, Yamin Yang, Weitao Li, Zhiyu Qian
The dramatically increased use of electricity is raising major concerns as to the consequences of the interaction between electromagnetic field (EMF) and neurobiology. The aim of this study is to investigate the effects of magnetic field on working memory in the hippocampal region by analyzing local field potentials (LFPs) and spikes pattern in vivo. In present study, mice were exposed to EMF (50Hz, 1mT), static magnetic field (SMF, 1mT), or placed in the exposure tube but without EMF exposure (SHAM), respectively...
June 1, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28573679/bidirectional-electric-communication-between-the-inferior-occipital-gyrus-and-the-amygdala-during-face-processing
#16
Wataru Sato, Takanori Kochiyama, Shota Uono, Kazumi Matsuda, Keiko Usui, Naotaka Usui, Yushi Inoue, Motomi Toichi
Faces contain multifaceted information that is important for human communication. Neuroimaging studies have revealed face-specific activation in multiple brain regions, including the inferior occipital gyrus (IOG) and amygdala; it is often assumed that these regions constitute the neural network responsible for the processing of faces. However, it remains unknown whether and how these brain regions transmit information during face processing. This study investigated these questions by applying dynamic causal modeling of induced responses to human intracranial electroencephalography data recorded from the IOG and amygdala during the observation of faces, mosaics, and houses in upright and inverted orientations...
June 2, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28573048/brain-oscillations-elicited-by-the-cold-pressor-test-a-putative-index-of-untreated-essential-hypertension
#17
Christos Papageorgiou, Efstathios Manios, Eleftheria Tsaltas, Eleni Koroboki, Maria Alevizaki, Elias Angelopoulos, Meletios-Athanasios Dimopoulos, Charalabos Papageorgiou, Nikolaos Zakopoulos
OBJECTIVE: Essential hypertension is associated with reduced pain sensitivity of unclear aetiology. This study explores this issue using the Cold Pressor Test (CPT), a reliable pain/stress model, comparing CPT-related EEG activity in first episode hypertensives and controls. METHOD: 22 untreated hypertensives and 18 matched normotensives underwent 24-hour ambulatory blood pressure monitoring (ABPM). EEG recordings were taken before, during, and after CPT exposure...
2017: International Journal of Hypertension
https://www.readbyqxmd.com/read/28536507/dopamine-modulates-delta-gamma-phase-amplitude-coupling-in-the-prefrontal-cortex-of-behaving-rats
#18
Victoria Andino-Pavlovsky, Annie C Souza, Robson Scheffer-Teixeira, Adriano B L Tort, Roberto Etchenique, Sidarta Ribeiro
Dopamine release and phase-amplitude cross-frequency coupling (CFC) have independently been implicated in prefrontal cortex (PFC) functioning. To causally investigate whether dopamine release affects phase-amplitude comodulation between different frequencies in local field potentials (LFP) recorded from the medial PFC (mPFC) of behaving rats, we used RuBiDopa, a light-sensitive caged compound that releases the neurotransmitter dopamine when irradiated with visible light. LFP power did not change in any frequency band after the application of light-uncaged dopamine, but significantly strengthened phase-amplitude comodulation between delta and gamma oscillations...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28536269/a-cognition-related-neural-oscillation-pattern-generated-in-the-prelimbic-cortex-can-control-operant-learning-in-rats
#19
Samuel Hernández-González, Celia Andreu-Sánchez, Miguel Ángel Martín-Pascual, Agnès Gruart, José María Delgado-García
The prelimbic (PrL) cortex constitutes one of the highest levels of cortical hierarchy dedicated to the execution of adaptive behaviors. We have identified a specific local field potential (LFP) pattern generated in the PrL cortex and associated with cognition-related behaviors. We used this pattern to trigger the activation of a visual display on a touch screen as part of an operant conditioning task. Rats learned to increase the presentation rate of the selected θ to β-γ (θ/β-γ) transition pattern across training sessions...
June 14, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28532653/hippocampal-ca1-local-field-potential-oscillations-induced-by-olfactory-cue-of-liked-food
#20
Nifareeda Samerphob, Dania Cheaha, Surapong Chatpun, Ekkasit Kumarnsit
Eating motivation is induced not only by negative energy balance but also food related cues. However, neural processing for acquisition of learned food preference remains to be established. This study aimed to identify hippocampal neural signaling in response to olfactory cue (chocolate scent) after completion of repetitive chocolate sessions. Male Swiss albino mice implanted with intracranial electrode into the hippocampus were used for local field potential (LFP) recording. Animals were given chocolate sessions (a piece of 2g chocolate per each mouse to eat on day 1, 3, 5 and 7)...
May 19, 2017: Neurobiology of Learning and Memory
keyword
keyword
30868
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"