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https://www.readbyqxmd.com/read/29037507/gamma-oscillations-in-the-superior-colliculus-and-pulvinar-in-response-to-faces-support-discrimination-performance-in-monkeys
#1
Quan Van Le, Hiroshi Nishimaru, Jumpei Matsumoto, Yusaku Takamura, Nguyen Minh Nui, Can Van Mao, Etsuro Hori, Rafael S Maior, Carlos Tomaz, Taketoshi Ono, Hisao Nishijo
The subcortical visual pathway including the superior colliculus (SC), pulvinar, and amygdala has been implicated in unconscious visual processing of faces, eyes, and gaze direction in blindsight. Our previous studies reported that monkey SC and pulvinar neurons responded preferentially to images of faces while performing a delayed non-matching to sample (DNMS) task to discriminate different visual stimuli (Nguyen et al., 2013, 2014). However, the contribution of SC and pulvinar neurons to the discrimination of the facial images and subsequent behavioral performance remains unknown...
October 13, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/29036430/delta-vs-gamma-auditory-steady-state-synchrony-in-schizophrenia
#2
Krishna C Puvvada, Ann Summerfelt, Xiaoming Du, Nithin Krishna, Peter Kochunov, Laura M Rowland, Jonathan Z Simon, L Elliot Hong
Background: Delta band (1-4 Hz) neuronal responses support the precision and stability of auditory processing, and a deficit in delta band synchrony may be relevant to auditory domain symptoms in schizophrenia patients. Methods: Delta band synchronization elicited by a 2.5 Hz auditory steady state response (ASSR) paradigm, along with those from theta (5 Hz), alpha (10 Hz), beta (20 Hz), gamma (40 Hz), and high gamma (80 Hz) frequency ASSR, were compared in 128 patients with schizophrenia, 108 healthy controls, and 55 first-degree relatives (FDR) of patients...
June 20, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29031639/oscillatory-neural-representations-in-the-sensory-thalamus-predict-neuropathic-pain-relief-by-deep-brain-stimulation
#3
Yongzhi Huang, Alexander L Green, Jonathan Hyam, James Fitzgerald, Tipu Z Aziz, Shouyan Wang
OBJECTIVE: Understanding the function of sensory thalamic neural activity is essential for developing and improving interventions for neuropathic pain. However, there is a lack of investigation of the relationship between sensory thalamic oscillations and pain relief in patients with neuropathic pain. This study aims to identify the oscillatory neural characteristics correlated with pain relief induced by deep brain stimulation (DBS), and develop a quantitative model to predict pain relief by integrating characteristic measures of the neural oscillations...
October 12, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/29028955/gamma-band-oscillations-preferential-for-nociception-can-be-recorded-in-the-human-insula
#4
Giulia Liberati, Anne Klöcker, Maxime Algoet, Dounia Mulders, Marta Maia Safronova, Susana Ferrao Santos, José-Géraldo Ribeiro Vaz, Christian Raftopoulos, André Mouraux
Transient nociceptive stimuli elicit robust phase-locked local field potentials (LFPs) in the human insula. However, these responses are not preferential for nociception, as they are also elicited by transient non-nociceptive vibrotactile, auditory, and visual stimuli. Here, we investigated whether another feature of insular activity, namely gamma-band oscillations (GBOs), is preferentially observed in response to nociceptive stimuli. Although nociception-evoked GBOs have never been explored in the insula, previous scalp electroencephalography and magnetoencephalography studies suggest that nociceptive stimuli elicit GBOs in other areas such as the primary somatosensory and prefrontal cortices, and that this activity could be closely related to pain perception...
September 25, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29024193/interbrain-phase-synchronization-during-turn-taking-verbal-interaction-a-hyperscanning-study-using-simultaneous-eeg-meg
#5
Sangtae Ahn, Hohyun Cho, Moonyoung Kwon, Kiwoong Kim, Hyukchan Kwon, Bong Soo Kim, Won Seok Chang, Jin Woo Chang, Sung Chan Jun
Recently, neurophysiological findings about social interaction have been investigated widely, and hardware has been developed that can measure multiple subjects' brain activities simultaneously. These hyperscanning studies have enabled us to discover new and important evidences of interbrain interactions. Yet, very little is known about verbal interaction without any visual input. Therefore, we conducted a new hyperscanning study based on verbal, interbrain turn-taking interaction using simultaneous EEG/MEG, which measures rapidly changing brain activities...
October 11, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29022224/prepulse-inhibition-of-auditory-cortical-responses-in-the-caudolateral-superior-temporal-gyrus-in-macaca-mulatta
#6
Zuyue Chen, Lauri Parkkonen, Jingkuan Wei, Jin-Run Dong, Yuanye Ma, Synnöve Carlson
Prepulse inhibition (PPI) refers to a decreased response to a startling stimulus when another weaker stimulus precedes it. Most PPI studies have focused on the physiological startle reflex and fewer have reported the PPI of cortical responses. We recorded local field potentials (LFPs) in four monkeys and investigated whether the PPI of auditory cortical responses (alpha, beta, and gamma oscillations and evoked potentials) can be demonstrated in the caudolateral belt of the superior temporal gyrus (STGcb). We also investigated whether the presence of a conspecific, which draws attention away from the auditory stimuli, affects the PPI of auditory cortical responses...
October 11, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/29021388/in-vivo-beta-and-gamma-subthreshold-oscillations-in-rat-mitral-cells-origin-and-gating-by-respiratory-dynamics
#7
Nicolas Fourcaud-Trocmé, Virginie Briffaud, Marc Thévenet, Nathalie Buonviso, Corine Amat
In mammals, olfactory bulb (OB) dynamics are paced by slow and fast oscillatory rhythms at multiple levels: local field potential, spike discharge, and/or membrane potential oscillations. Interactions between these levels have been well studied for the slow rhythm linked to animal respiration. However, less is known regarding rhythms in the fast beta (10-35Hz) and gamma (35-100Hz) frequency ranges, particularly at the membrane potential level. Using a combination of intracellular and extracellular recordings in the OB of freely breathing rats, we show that beta and gamma subthreshold oscillations (STO) coexist intracellularly and are related to extracellular LFP oscillations in the same frequency range...
October 11, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28987817/the-sodium-channel-activator-lu-ae98134-normalizes-the-altered-firing-properties-of-fast-spiking-interneurons-in-dlx5-6-mice
#8
Nadia Lybøl von Schoubye, Kristen Frederiksen, Uffe Kristiansen, Anders Victor Petersen, Nils Ole Dalby, Morten Grunnet, Henrik Sindal Jensen, Thomas Jespersen, Vikaas S Sohal, Jean-François Perrier
Mental disorders such as schizophrenia are associated with impaired firing properties of fast spiking inhibitory interneurons (FSINs) causing reduced task-evoked gamma-oscillation in prefrontal cortex. The voltage-gated sodium channel NaV1.1 is highly expressed in PV-positive interneurons, but only at low levels in principal cells. Positive modulators of Nav1.1 channels are for this reason considered potential candidates for the treatment of cognitive disorders. Here we examined the effect of the novel positive modulator of voltage-gated sodium channels Lu AE98134...
October 5, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28985437/the-role-of-gamma-interbrain-synchrony-in-social-coordination-when-humans-face-territorial-threats
#9
Yan Mu, Shihui Han, Michele J Gelfand
Throughout history and into the modern era, human groups have been continually subjected to a wide range of societal threats, from natural disasters to pandemics to terrorism. Yet despite this fundamental aspect of human existence, there has been little research on how societal threat affects social coordination at both the neural and the behavioral level. Here, we show for the first time that individuals are better able to coordinate under high societal threat as compared to low or no threat (Experiment 1)...
July 27, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/28970502/distance-dependent-inhibition-facilitates-focality-of-gamma-oscillations-in-the-dentate-gyrus
#10
Michael Strüber, Jonas-Frederic Sauer, Peter Jonas, Marlene Bartos
Gamma oscillations (30-150 Hz) in neuronal networks are associated with the processing and recall of information. We measured local field potentials in the dentate gyrus of freely moving mice and found that gamma activity occurs in bursts, which are highly heterogeneous in their spatial extensions, ranging from focal to global coherent events. Synaptic communication among perisomatic-inhibitory interneurons (PIIs) is thought to play an important role in the generation of hippocampal gamma patterns. However, how neuronal circuits can generate synchronous oscillations at different spatial scales is unknown...
October 2, 2017: Nature Communications
https://www.readbyqxmd.com/read/28968898/loss-of-trkb-signaling-in-parvalbumin-expressing-basket-cells-results-in-network-activity-disruption-and-abnormal-behavior
#11
Dionysios Xenos, Marija Kamceva, Simone Tomasi, Jessica A Cardin, Michael L Schwartz, Flora M Vaccarino
The GABAergic system is regulated by the brain-derived neurotrophic factor (BDNF)/Tropomyosin-related kinase B (TrkB) pathway, but the cell-intrinsic role of TrkB signaling in parvalbumin cortical interneuron development and function is unclear. We performed conditional ablation of the TrkB receptor in parvalbumin-expressing (PV) interneurons to study whether postnatal loss of TrkB in parvalbumin cells affects their survival, connectivity, spontaneous and evoked neuronal activity and behavior. Using in vivo recordings of local field potentials, we found reduced gamma oscillations in the sensory cortex of PVcre+; TrkBF/F conditional knockout mice (TrkB cKO), along with increased firing of putative excitatory neurons...
August 18, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28967870/sensitivity-of-the-mixing-current-technique-for-the-detection-of-mechanical-motion-in-the-coherent-tunnelling-regime
#12
Yue Wang, Gianluca Micchi, Fabio Pistolesi
In a recent publication we have studied theoretically the sensitivity of the mixing-current technique to detect nanomechanical motion by coupling the oscillator to a single-electron transistor in the incoherent tunnelling regime: $\Gamma \ll k_B T$, where $\Gamma$ is the tunnelling rate, $T$ is the electronic temperature, and $k_B$ the Boltzmann constant. In this work we consider the same problem when the detection device is a quantum dot in the coherent tunnelling regime ($\Gamma \gg k_B T$)...
October 2, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28966082/the-peak-frequency-of-motor-related-gamma-oscillations-is-modulated-by-response-competition
#13
Elizabeth Heinrichs-Graham, Joslynn M Hoburg, Tony W Wilson
Movement execution generally occurs in an environment with numerous distractors, and requires the selection of a motor plan from multiple possible alternatives. However, the impact of such distractors on cortical motor function during movement remains largely unknown. Previous studies have identified two movement-related oscillatory responses that are critical to motor planning and execution, and these responses include the peri-movement beta event-related desynchronization (ERD) and the movement-related gamma synchronization (MRGS)...
September 28, 2017: NeuroImage
https://www.readbyqxmd.com/read/28959192/brainstem-influence-on-thalamocortical-oscillations-during-anesthesia-emergence
#14
Christopher M Scheib
Theories of mechanisms that impair or prevent consciousness during anesthesia that are related to thalamocortical oscillations have been proposed. Many methods of EEG analysis have been proposed as measures of anesthetic effects but only a few have potential to provide measures of those anesthetic effects that are directly related to thalamocortical oscillations. Some of these methods will be explained and demonstrated with examples chosen to provide evidence for or against two of the proposed mechanisms. The first of the two mechanisms to be addressed is the "traveling peak" (Ching et al...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28954895/breathing-above-the-brainstem-volitional-control-and-attentional-modulation-in-humans
#15
Jose Luis Herrero, Simon Khuvis, Erin Yeagle, Moran Cerf, Ashesh D Mehta
While the neurophysiology of respiration has traditionally focused on automatic brainstem processes, higher brain mechanisms underlying the cognitive aspects of breathing are gaining increasing interest. Therapeutic techniques have used conscious control and awareness of breathing for millennia with little understanding of the mechanisms underlying their efficacy. Using direct intracranial recordings in humans, we correlated cortical and limbic neuronal activity as measured by the intracranial electroencephalogram (iEEG) with the breathing cycle...
September 27, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28949823/language-prediction-is-reflected-by-coupling-between-frontal-gamma-and-posterior-alpha-oscillations
#16
Lin Wang, Peter Hagoort, Ole Jensen
Readers and listeners actively predict upcoming words during language processing. These predictions might serve to support the unification of incoming words into sentence context and thus rely on interactions between areas in the language network. In the current magnetoencephalography study, participants read sentences that varied in contextual constraints so that the predictability of the sentence-final words was either high or low. Before the sentence-final words, we observed stronger alpha power suppression for the highly compared with low constraining sentences in the left inferior frontal cortex, left posterior temporal region, and visual word form area...
September 26, 2017: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/28949820/pilates-and-proprioceptive-neuromuscular-facilitation-methods-induce-similar-strength-gains-but-different-neuromuscular-adaptations-in-elderly-women
#17
Fabiana Teixeira de Carvalho, Laiana Sepúlveda de Andrade Mesquita, Rafael Pereira, Osmar Pinto Neto, Renato Amaro Zangaro
Background/Study Context: The aging process is associated with a decline in muscle mass, strength, and conditioning. Two training methods that may be useful to improve muscle function are Pilates and proprioceptive neuromuscular facilitation (PNF). Thus, the present study aimed to compare the influence of training programs using Pilates and PNF methods with elderly women. METHODS: Sixty healthy elderly women were randomly divided into three groups: Pilates group, PNF group, and control group...
September 26, 2017: Experimental Aging Research
https://www.readbyqxmd.com/read/28944474/altered-neural-oscillations-during-multisensory-integration-in-adolescents-with-fetal-alcohol-spectrum-disorder
#18
Alfredo D Bolaños, Brian A Coffman, Felicha T Candelaria-Cook, Piyadasa Kodituwakku, Julia M Stephen
BACKGROUND: Children with fetal alcohol spectrum disorder (FASD), who were exposed to alcohol in utero, display a broad range of sensory, cognitive, and behavioral deficits, which are broadly theorized to be rooted in altered brain function and structure. Based on the role of neural oscillations in multisensory integration from past studies, we hypothesized that adolescents with FASD would show a decrease in oscillatory power during event-related gamma oscillatory activity (30-100Hz), when compared to typically-developing healthy controls (HC), and that such decrease in oscillatory power would predict behavioral performance...
September 25, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28930523/the-evolving-concept-of-the-intrinsic-hippocampal-theta-gamma-oscillator
#19
Mauro Cataldi, Chiara Vigliotti
  Three main types of electrical oscillations are recorded from the hippocampus in vivo: theta (θ), gamma (γ) and sharp wave ripples with frequency bands of 4-12, 25-100 and 110-250 Hz, respectively. Theta activity is the more robust of them, and has important physiological roles because it is involved in spatial navigation, memory formation and memory retrieval. Classical lesion studies in vivo have suggested that the hippocampus passively follows the θ  rhythm generated in the septum by neurons that are synaptically connected with hippocampal neurons though septo-hippocampal connections...
January 1, 2018: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/28926001/ketamine-differential-neurophysiological-dynamics-in-functional-networks-in-the-rat-brain
#20
A Ahnaou, H Huysmans, R Biermans, N V Manyakov, W H I M Drinkenburg
Recently, the N-methyl-d-aspartate-receptor (NMDAR) antagonist ketamine has emerged as a fast-onset mechanism to achieve antidepressant activity, whereas its psychomimetic, dissociative and amnestic effects have been well documented to pharmacologically model schizophrenia features in rodents. Sleep-wake architecture, neuronal oscillations and network connectivity are key mechanisms supporting brain plasticity and cognition, which are disrupted in mood disorders such as depression and schizophrenia. In rats, we investigated the dynamic effects of acute and chronic subcutaneous administration of ketamine (2...
September 19, 2017: Translational Psychiatry
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