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Neural Oscillations

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https://www.readbyqxmd.com/read/29792887/auditory-priming-improves-neural-synchronization-in-auditory-motor-entrainment
#1
Jewel E Crasta, Michael H Thaut, Charles W Anderson, Patricia L Davies, William J Gavin
Neurophysiological research has shown that auditory and motor systems interact during movement to rhythmic auditory stimuli through a process called entrainment. This study explores the neural oscillations underlying auditory-motor entrainment using electroencephalography. Forty young adults were randomly assigned to one of two control conditions, an auditory-only condition or a motor-only condition, prior to a rhythmic auditory-motor synchronization condition (referred to as combined condition). Participants assigned to the auditory-only condition (auditory-first group) listened to 400 trials of auditory stimuli presented every 800ms, while those in the motor-only condition (motor-first group) were asked to tap rhythmically every 800ms without any external stimuli...
May 21, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29789611/an-intrinsic-role-of-beta-oscillations-in-memory-for-time-estimation
#2
Martin Wiener, Alomi Parikh, Arielle Krakow, H Branch Coslett
The neural mechanisms underlying time perception are of vital importance to a comprehensive understanding of behavior and cognition. Recent work has suggested a supramodal role for beta oscillations in measuring temporal intervals. However, the precise function of beta oscillations and whether their manipulation alters timing has yet to be determined. To accomplish this, we first re-analyzed two, separate EEG datasets and demonstrate that beta oscillations are associated with the retention and comparison of a memory standard for duration...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29787606/profiling-neurotransmitters-in-a-crustacean-neural-circuit-for-locomotion
#3
Anna C Schneider, Henriette A Seichter, Susanne Neupert, A Maren Hochhaus, Carmen R Smarandache-Wellmann
Locomotor systems are widely used to study rhythmically active neural networks. These networks have to be coordinated in order to produce meaningful behavior. The crayfish swimmeret system is well suited to investigate such coordination of distributed neural oscillators because the neurons and their connectivity for generating and especially for coordinating the motor output are identified. The system maintains a fixed phase lag between the segmental oscillators, independent of cycle period. To further the understanding of the system's plasticity for keeping the phase lag fixed, we profiled the neurotransmitters used by the Coordinating Neurons, which are necessary and sufficient for coordination of the segmental oscillators...
2018: PloS One
https://www.readbyqxmd.com/read/29781644/neurodevelopmental-differences-to-social-exclusion-an-event-related-neural-oscillation-study-of-children-adolescents-and-adults
#4
Alva Tang, Ayelet Lahat, Michael J Crowley, Jia Wu, Louis A Schmidt
Although the neural correlates of social exclusion have been well-documented, most studies have examined single age groups. No studies have directly compared specific age-related differences in social exclusion across children, adolescents, and adults using event-related oscillatory electroencephalogram (EEG) dynamics. The authors examined event-related theta EEG power and phase coherence in fair play and social exclusion conditions during the Cyberball task in 166 participants: 42 children (ages 10-12), 56 adolescents (ages 14-17), and 68 adults (ages 18-28)...
May 21, 2018: Emotion
https://www.readbyqxmd.com/read/29779940/encoding-of-articulatory-kinematic-trajectories-in-human-speech-sensorimotor-cortex
#5
Josh Chartier, Gopala K Anumanchipalli, Keith Johnson, Edward F Chang
When speaking, we dynamically coordinate movements of our jaw, tongue, lips, and larynx. To investigate the neural mechanisms underlying articulation, we used direct cortical recordings from human sensorimotor cortex while participants spoke natural sentences that included sounds spanning the entire English phonetic inventory. We used deep neural networks to infer speakers' articulator movements from produced speech acoustics. Individual electrodes encoded a diversity of articulatory kinematic trajectories (AKTs), each revealing coordinated articulator movements toward specific vocal tract shapes...
May 8, 2018: Neuron
https://www.readbyqxmd.com/read/29778763/oscillation-patterns-of-local-field-potentials-in-the-dorsal-striatum-and-sensorimotor-cortex-during-the-encoding-maintenance-and-decision-stages-for-the-ordinal-comparison-of-sub-and-supra-second-signal-durations
#6
REVIEW
Bon-Mi Gu, Keshav Kukreja, Warren H Meck
Ordinal comparison of successively presented signal durations requires a) the encoding of the first signal duration (standard), b) maintenance of temporal information specific to the standard duration in memory, and c) timing of the second signal duration (comparison) during which a comparison is made of the first and second durations. Rats were first trained to make ordinal comparisons of signal durations within three time ranges using 0.5, 1.0, and 3.0-s standard durations. Local field potentials were then recorded from the dorsal striatum and sensorimotor cortex in order to investigate the pattern of neural oscillations during each phase of the ordinal-comparison process...
May 17, 2018: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29778070/high-intensity-binge-drinking-is-associated-with-alterations-in-spontaneous-neural-oscillations-in-young-adults
#7
Rifqi O Affan, Siyuan Huang, Stephen M Cruz, Lee A Holcomb, Edward Nguyen, Ksenija Marinkovic
Heavy episodic alcohol consumption (also termed binge drinking) contributes to a wide range of health and cognitive deficits, but the associated brain-based indices are poorly understood. The current study used electroencephalography (EEG) to examine spontaneous neural oscillations in young adults as a function of quantity, frequency, and the pattern of their alcohol consumption. Sixty-one young adults (23.4 ± 3.4 years of age) were assigned to binge drinking (BD) and light drinking (LD) groups that were equated on gender, race/ethnic identity, age, educational background, and family history of alcoholism...
January 8, 2018: Alcohol
https://www.readbyqxmd.com/read/29777479/frontal-delta-beta-cross-frequency-coupling-in-high-and-low-social-anxiety-an-index-of-stress-regulation
#8
Eefje S Poppelaars, Anita Harrewijn, P Michiel Westenberg, Melle J W van der Molen
Cross-frequency coupling (CFC) between frontal delta (1-4 Hz) and beta (14-30 Hz) oscillations has been suggested as a candidate neural correlate of social anxiety disorder, a disorder characterized by fear and avoidance of social and performance situations. Prior studies have used amplitude-amplitude correlation (AAC) as a CFC measure and hypothesized it as a candidate neural mechanism of affective control. However, using this metric has yielded inconsistent results regarding the direction of CFC, and the functional significance of coupling strength is uncertain...
May 17, 2018: Cognitive, Affective & Behavioral Neuroscience
https://www.readbyqxmd.com/read/29776144/inhibition-delay-increases-neural-network-capacity-through-stirling-transform
#9
Alain Nogaret, Alastair King
Inhibitory neural networks are found to encode high volumes of information through delayed inhibition. We show that inhibition delay increases storage capacity through a Stirling transform of the minimum capacity which stabilizes locally coherent oscillations. We obtain both the exact and asymptotic formulas for the total number of dynamic attractors. Our results predict a (ln2)^{-N}-fold increase in capacity for an N-neuron network and demonstrate high-density associative memories which host a maximum number of oscillations in analog neural devices...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29775702/abnormal-sleep-architecture-and-hippocampal-circuit-dysfunction-in-a-mouse-model-of-fragile-x-syndrome
#10
Christine E Boone, Heydar Davoudi, Jon B Harrold, David J Foster
Fragile X syndrome (FXS) is the most common heritable cause of intellectual disability and single-gene cause of autism spectrum disorder. The Fmr1 null mouse models much of the human disease including hyperarousal, sensory hypersensitivity, seizure activity, and hippocampus-dependent cognitive impairment. Sleep architecture is disorganized in FXS patients, but has not been examined in Fmr1 knockout (Fmr1-KO) mice. Hippocampal neural activity during sleep, which is implicated in memory processing, also remains uninvestigated in Fmr1-KO mice...
May 15, 2018: Neuroscience
https://www.readbyqxmd.com/read/29773984/midfrontal-theta-and-posterior-parietal-alpha-band-oscillations-support-conflict-resolution-in-a-masked-affective-priming-task
#11
Jun Jiang, Kira Bailey, Xiao Xiao
Past attempts to characterize the neural mechanisms of affective priming have conceptualized it in terms of classic cognitive conflict, but have not examined the neural oscillatory mechanisms of subliminal affective priming. Using behavioral and electroencephalogram (EEG) time frequency (TF) analysis, the current study examines the oscillatory dynamics of unconsciously triggered conflict in an emotional facial expressions version of the masked affective priming task. The results demonstrate that the power dynamics of conflict are characterized by increased midfrontal theta activity and suppressed parieto-occipital alpha activity...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29766764/local-cortical-activity-of-distant-brain-areas-can-phase-lock-to-the-olfactory-bulb-s-respiratory-rhythm-in-the-freely-behaving-rat
#12
Daniel Rojas-Líbano, Jonathan Wimmer Del Solar, Marcelo Aguilar-Rivera, Rodrigo Montefusco-Siegmund, Pedro Esteban Maldonado
An important unresolved question about neural processing is the mechanism by which distant brain areas coordinate their activities and relate their local processing to global neural events. A potential candidate for the local-global integration are slow rhythms such as respiration. In this article, we asked if there are modulations of local cortical processing which are phase-locked to (peripheral) sensory-motor exploratory rhythms. We studied rats on an elevated platform where they would spontaneously display exploratory and rest behaviors...
May 16, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29766586/awareness-is-related-to-reduced-post-stimulus-alpha-power-a-no-report-inattentional-blindness-study
#13
Anthony M Harris, Paul E Dux, Jason B Mattingley
Delineating the neural correlates of sensory awareness is a key requirement for developing a neuroscientific understanding of consciousness. A neural signal that has been proposed as a key neural correlate of awareness is amplitude reduction of 8-14 Hz alpha oscillations. Alpha oscillations are also closely linked to processes of spatial attention, providing potential alternative explanations for past results associating alpha oscillations with awareness. We employed a no-report inattentional blindness (IB) paradigm with electroencephalography to examine the association between awareness and the power of 8-14 Hz alpha oscillations...
May 15, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29760182/alternating-modulation-of-subthalamic-nucleus-beta-oscillations-during-stepping
#14
Petra Fischer, Chiung Chu Chen, Ya Ju Chang, Chien-Hung Yeh, Alek Pogosyan, Damian M Herz, Binith Cheeran, Alexander L Green, Tipu Z Aziz, Jonathan Hyam, Simon Little, Thomas Foltynie, Patricia Limousin, Ludvic Zrinzo, Harutomo Hasegawa, Michael Samuel, Keyoumars Ashkan, Peter Brown, Huiling Tan
Gait disturbances in Parkinson's disease are commonly refractory to current treatment options and majorly impair patient's quality of life. Auditory cues facilitate gait and prevent motor blocks. We investigated how neural dynamics in the human subthalamic nucleus of Parkinsons's disease patients (14 male, 2 female) vary during stepping and whether rhythmic auditory cues enhance the observed modulation. Oscillations in the beta band were suppressed after ipsilateral heel strikes, when the contralateral foot had to be raised, and re-appeared after contralateral heel strikes, when the contralateral foot rested on the floor...
May 14, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29753784/theta-oscillations-promote-temporal-sequence-learning
#15
Jordan Crivelli-Decker, Liang-Tien Hsieh, Alex Clarke, Charan Ranganath
Many theoretical models suggest that neural oscillations play a role in learning or retrieval of temporal sequences, but the extent to which oscillations support sequence representation remains unclear. To address this question, we used scalp electroencephalography (EEG) to examine oscillatory activity over learning of different object sequences. Participants made semantic decisions on each object as they were presented in a continuous stream. For three "Consistent" sequences, the order of the objects was always fixed...
May 10, 2018: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29743869/alpha-power-modulates-perception-independently-of-endogenous-factors
#16
Sasskia Brüers, Rufin VanRullen
Oscillations are ubiquitous in the brain. Alpha oscillations in particular have been proposed to play an important role in sensory perception. Past studies have shown that the power of ongoing EEG oscillations in the alpha band is negatively correlated with visual outcome. Moreover, it also co-varies with other endogenous factors such as attention, vigilance, or alertness. In turn, these endogenous factors influence visual perception. Therefore, it remains unclear how much of the relation between alpha and perception is indirectly mediated by such endogenous factors, and how much reflects a direct causal influence of alpha rhythms on sensory neural processing...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29741160/adaptive-deep-brain-stimulation-for-parkinson-s-disease-using-motor-cortex-sensing
#17
Nicole C Swann, Coralie de Hemptinne, Margaret C Thompson, Svjetlana Miocinovic, Andrew M Miller, Ro'ee Gilron, Jill L Ostrem, Howard J Chizeck, Philip A Starr
OBJECTIVE: Contemporary deep brain stimulation (DBS) for Parkinson's disease is delivered continuously, and adjustments based on patient's changing symptoms must be made manually by a trained clinician. Patients may be subjected to energy intensive settings at times when they are not needed, possibly resulting in stimulation-induced adverse effects, such as dyskinesia. One solution is 'adaptive' DBS, in which stimulation is modified in real time based on neural signals that co-vary with the severity of motor signs or of stimulation-induced adverse effects...
May 9, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29739627/neural-oscillations-sustained-rhythms-or-transient-burst-events
#18
Freek van Ede, Andrew J Quinn, Mark W Woolrich, Anna C Nobre
Frequency-specific patterns of neural activity are increasingly interpreted as transient bursts of isolated events rather than as rhythmically sustained oscillations. This has potentially far-reaching implications for theories of how such oscillations originate and how they shape neural computations. As this debate unfolds, we explore alternative interpretations and ask how best to distinguish between them.
May 5, 2018: Trends in Neurosciences
https://www.readbyqxmd.com/read/29733953/anticipatory-neural-dynamics-of-spatial-temporal-orienting-of-attention-in-younger-and-older-adults
#19
Simone G Heideman, Gustavo Rohenkohl, Joshua J Chauvin, Clare E Palmer, Freek van Ede, Anna C Nobre
Spatial and temporal expectations act synergistically to facilitate visual perception. In the current study, we sought to investigate the anticipatory oscillatory markers of combined spatial-temporal orienting and to test whether these decline with ageing. We examined anticipatory neural dynamics associated with joint spatial-temporal orienting of attention using magnetoencephalography (MEG) in both younger and older adults. Participants performed a cued covert spatial-temporal orienting task requiring the discrimination of a visual target...
May 4, 2018: NeuroImage
https://www.readbyqxmd.com/read/29729958/neural-markers-of-memory-consolidation-do-not-predict-temporal-estimates-of-encoded-items
#20
Atser Damsma, Robbert van der Mijn, Hedderik van Rijn
In contrast to the paradigms used in most laboratory experiments on interval timing, everyday tasks often involve tracking multiple, concurrent intervals without an explicit starting signal. As these characteristics are problematic for most existing clock-based models of interval timing, here we explore an alternative notion that suggests that time perception and working memory encoding might be closely connected. In this integrative model, the consolidation of a new item in working memory initiates cortical oscillations that also signal the onset of a time interval...
May 3, 2018: Neuropsychologia
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