keyword
MENU ▼
Read by QxMD icon Read
search

Beta rhythm

keyword
https://www.readbyqxmd.com/read/28337597/the-functional-role-of-post-movement-beta-oscillations-in-motor-termination
#1
Elizabeth Heinrichs-Graham, Max J Kurz, James E Gehringer, Tony W Wilson
Shortly after movement termination, there is a strong increase or resynchronization of the beta rhythm (15-30 Hz) across the sensorimotor network of humans, known as the post-movement beta rebound (PMBR). This response has been associated with active inhibition of the motor network following the completion of a movement, sensory afferentation of the sensorimotor cortices, and other functions. However, studies that have directly probed the role of the PMBR in movement execution have reported mixed results, possibly due to differences in the amount of total motor output and/or movement complexity...
March 24, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28323091/age-related-differences-in-functional-synchronization-of-eeg-activity-as-evaluated-by-means-of-tms-eeg-coregistrations
#2
Florinda Ferreri, Fabrizio Vecchio, Andrea Guerra, Francesca Miraglia, David Ponzo, Luca Vollero, Giulio Iannello, Sara Maatta, Esa Mervaala, Paolo Maria Rossini, Vincenzo Di Lazzaro
It was recently demonstrated that the characteristics of EEG rhythms preceding a transcranial magnetic stimulation (TMS) of the motor cortex (M1) influence the motor-evoked potential (MEP) amplitude with a peculiar pattern, thus reflecting the M1 functional state. As physiological aging is related to a decrease in motor performance and changes in excitability and connectivity strength within cerebral sensorimotor circuits, we aimed to explore whether aging affects EEG-MEP interactions. Using MRI-navigated TMS and multichannel EEG, we compared the EEG-MEP interactions observed in healthy aged subjects with those observed in young volunteers...
March 16, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28323013/electroencephalographic-sensorimotor-rhythms-are-modulated-in-the-acute-phase-following-focal-vibration-in-healthy-subjects
#3
Susanna Lopez, Fabiano Bini, Claudio Del Percio, Franco Marinozzi, Claudia Celletti, Antonio Suppa, Raffaele Ferri, Emanuela Staltari, Filippo Camerota, Claudio Babiloni
Few minutes of focal vibration (FV) on limb muscles can improve motor control in neurological (stroke, Parkinson) patients for unknown underlying neurophysiological mechanisms. Here we hypothesized that in healthy volunteers this FV would increase excitability in the primary sensorimotor cortex (S1-M1) during an isometric contraction of the stimulated muscle. The design included an initial control condition with no FV stimulation (Baseline) as well as three short experimental sessions of FV and a Sham (fake) session in a pseudo-random order...
March 17, 2017: Neuroscience
https://www.readbyqxmd.com/read/28323009/investigation-of-the-effects-of-transcranial-alternating-current-stimulation-tacs-on-self-paced-rhythmic-movements
#4
Manuel Varlet, Alanna Wade, Giacomo Novembre, Peter E Keller
Human rhythmic movements spontaneously entrain to external rhythmic stimuli. Such sensory-motor entrainment can attract movements to different tempi and enhance their efficiency, with potential clinical applications for motor rehabilitation. Here we investigate whether entrainment of self-paced rhythmic movements can be induced via transcranial alternating current stimulation (tACS), which uses alternating currents to entrain spontaneous brain oscillations at specific frequencies. Participants swung a handheld pendulum at their preferred tempo with the right hand while tACS was applied over their left or right primary motor cortex at frequencies equal to their preferred tempo (Experiment 1) or in the alpha (10Hz) and beta (20Hz) ranges (Experiment 2)...
March 18, 2017: Neuroscience
https://www.readbyqxmd.com/read/28306170/impact-of-atrial-fibrillation-on-platelet-gene-expression
#5
Waldemar E Wysokinski, Alfonso Tafur, Naser Ammash, Samuel J Asirvatham, Yanhong Wu, Izabella Gosk-Bierska, Diane E Grill, Joshua P Slusser, Jozef Mruk, Robert D McBane
AIMS: Platelets retain cytoplasmic messenger RNA and are capable of protein biosynthesis. Several diseases are known to impact the platelet transcriptome but the effect of non-valvular atrial fibrillation (NVAF) on platelet RNA transcript is essentially unknown. The aim of this study was to evaluate the impact of NVAF on platelet RNA transcript by measuring platelet genes expression in consecutive NVAF patients before and 3-4 months after pulmonary vein isolation (PVI) and compared to normal sinus rhythm controls (NSR)...
March 17, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28286836/intravenous-amiodarone-versus-digoxin-in-atrial-fibrillation-rate-control-a-clinical-trial
#6
Majid Shojaee, Bahareh Feizi, Reza Miri, Jalil Etemadi, Amir Hossein Feizi
INTRODUCTION: Treatment of rapid ventricular response arterial fibrillation (rapid AF) varies depending on the decision of the in-charge physician, condition of the patient, availability of the drug, and the treatment protocol of the hospital. The present study was designed aiming to compare IV digoxin and amiodarone in controlling the heart rate of patients presenting to emergency department with rapid AF and relative contraindication for first line drug in this regard. METHOD: In the present clinical trial, patients presented to the ED with rapid AF and relative contraindication for calcium channel blockers and beta-blockers were treated with either IV amiodarone or IV digoxin and compared regarding success rate and complication using SPSS version 22...
2017: Emergency (Tehran, Iran)
https://www.readbyqxmd.com/read/28286478/cortical-alpha-oscillations-predict-speech-intelligibility
#7
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/28271390/alpha-beta-the-rhythm-of-the-attentional-blink
#8
Kimron L Shapiro, Simon Hanslmayr, James T Enns, Alejandro Lleras
Extant theories of the attentional blink propose that the most critical factor in determining second target accuracy is the time that elapses between the first and second targets. We report that this conclusion has overlooked an equally important determinant, namely, the frequency of the entraining stream in which these targets are embedded. Specifically, we show in two experiments that the signature of the attentional blink-second target accuracy that increases with intertarget lag-is significantly larger for entraining streams that are in the alpha-beta frequency range, relative to streams that are slower (theta) or faster (gamma)...
March 7, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28268615/soft-drink-effects-on-sensorimotor-rhythm-brain-computer-interface-performance-and-resting-state-spectral-power
#9
John Mundahl, Jianjun Meng, Jeffrey He, Bin He
Brain-computer interface (BCI) systems allow users to directly control computers and other machines by modulating their brain waves. In the present study, we investigated the effect of soft drinks on resting state (RS) EEG signals and BCI control. Eight healthy human volunteers each participated in three sessions of BCI cursor tasks and resting state EEG. During each session, the subjects drank an unlabeled soft drink with either sugar, caffeine, or neither ingredient. A comparison of resting state spectral power shows a substantial decrease in alpha and beta power after caffeine consumption relative to control...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28266823/cardiovascular-disease-update-atrial-fibrillation
#10
Johnathan D McDivitt, Craig Barstow
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia. The prevalence increases with age, especially in the seventh and eighth decades of life. AF also is associated with multiple risk factors and conditions that are managed commonly in family medicine settings, such as hypertension and diabetes. Rhythm control and rate control are primarily equivalent for mortality rate, but patients treated for rhythm control have more hospitalizations; however, rhythm control may be a viable option for select patients...
March 2017: FP Essentials
https://www.readbyqxmd.com/read/28252601/-specificity-of-spatial-organization-of-evoked-eeg-rhythms-in-patients-with-paranoid-schizophrenia
#11
V K Bochkarev, A V Kirenskaya, S V Solnceva, A A Tkachenko
AIM: The study aimed at analyzing the spatial patterns of evoked event-related oscillations in patients with paranoid schizophrenia and their relationship with clinical symptoms of disease. MATERIAL AND METHODS: Evoked delta, theta, alpha, beta, and gamma rhythms in response to target auditory stimulus in an oddball paradigm were studied in 21 schizophrenic patients and 22 healthy subjects. The independent spatial patterns were revealed within each of the frequency range using the principal component analysis...
2017: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/28228305/clinical-presentation-management-and-outcomes-in-the-indian-heart-rhythm-society-atrial-fibrillation-ihrs-af-registry
#12
A Vora, A Kapoor, M Nair, Y Lokhandwala, C Narsimhan, A G Ravikishore, S K Dwivedi, N Namboodiri, R Hygriv, A Saxena, A Nabar, S Garg, N Bardoloi, R Yadav, A Nambiar, U Pandurangi, D Jhala, A Naik, Nagmallesh, S Rajagopal, R Selvaraj, V Arora, A Thachil, J Thomas, G Panicker
AIM: A national atrial fibrillation (AF) registry was conducted under the aegis of the Indian Heart Rhythm Society (IHRS), to capture epidemiological data-type of AF, clinical presentation and comorbidities, current treatment practices, and 1-year follow-up outcomes. METHODS: A total of 1537 patients were enrolled from 24 sites in India in the IHRS-AF registry from July 2011 to August 2012. Their baseline characteristics and follow-up data were recorded in case report forms and subsequently analyzed...
January 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28226795/soft-drink-effects-on-sensorimotor-rhythm-brain-computer-interface-performance-and-resting-state-spectral-power
#13
John Mundahl, Jianjun Meng, Jeffrey He, Bin He, John Mundahl, Jianjun Meng, Jeffrey He, Bin He, Jeffrey He, Jianjun Meng, John Mundahl, Bin He
Brain-computer interface (BCI) systems allow users to directly control computers and other machines by modulating their brain waves. In the present study, we investigated the effect of soft drinks on resting state (RS) EEG signals and BCI control. Eight healthy human volunteers each participated in three sessions of BCI cursor tasks and resting state EEG. During each session, the subjects drank an unlabeled soft drink with either sugar, caffeine, or neither ingredient. A comparison of resting state spectral power shows a substantial decrease in alpha and beta power after caffeine consumption relative to control...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225010/beta-phase-synchronization-in-the-frontal-temporal-cerebellar-network-during-auditory-to-motor-rhythm-learning
#14
Kouki Edagawa, Masahiro Kawasaki
Rhythm is an essential element of dancing and music. To investigate the neural mechanisms underlying how rhythm is learned, we recorded electroencephalographic (EEG) data during a rhythm-reproducing task that asked participants to memorize an auditory stimulus and reproduce it via tapping. Based on the behavioral results, we divided the participants into Learning and No-learning groups. EEG analysis showed that error-related negativity (ERN) in the Learning group was larger than in the No-learning group. Time-frequency analysis of the EEG data showed that the beta power in right and left temporal area at the late learning stage was smaller than at the early learning stage in the Learning group...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28223926/frontal-functional-connectivity-of-electrocorticographic-delta-and-theta-rhythms-during-action-execution-versus-action-observation-in-humans
#15
Claudio Babiloni, Claudio Del Percio, Susanna Lopez, Giancarlo Di Gennaro, Pier P Quarato, Luigi Pavone, Roberta Morace, Andrea Soricelli, Giuseppe Noce, Vincenzo Esposito, Vittorio Gallese, Giovanni Mirabella
We have previously shown that in seven drug-resistant epilepsy patients, both reaching-grasping of objects and the mere observation of those actions did desynchronize subdural electrocorticographic (ECoG) alpha (8-13 Hz) and beta (14-30) rhythms as a sign of cortical activation in primary somatosensory-motor, lateral premotor and ventral prefrontal areas (Babiloni et al., 2016a). Furthermore, that desynchronization was greater during action execution than during its observation. In the present exploratory study, we reanalyzed those ECoG data to evaluate the proof-of-concept that lagged linear connectivity (LLC) between primary somatosensory-motor, lateral premotor and ventral prefrontal areas would be enhanced during the action execution compared to the mere observation due to a greater flow of visual and somatomotor information...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28216627/layer-specific-optogenetic-activation-of-pyramidal-neurons-causes-beta-gamma-entrainment-of-neonatal-networks
#16
Sebastian H Bitzenhofer, Joachim Ahlbeck, Amy Wolff, J Simon Wiegert, Christine E Gee, Thomas G Oertner, Ileana L Hanganu-Opatz
Coordinated activity patterns in the developing brain may contribute to the wiring of neuronal circuits underlying future behavioural requirements. However, causal evidence for this hypothesis has been difficult to obtain owing to the absence of tools for selective manipulation of oscillations during early development. We established a protocol that combines optogenetics with electrophysiological recordings from neonatal mice in vivo to elucidate the substrate of early network oscillations in the prefrontal cortex...
February 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28193169/eeg-correlates-of-working-memory-performance-in-females
#17
Yuri G Pavlov, Boris Kotchoubey
BACKGROUND: The study investigates oscillatory brain activity during working memory (WM) tasks. The tasks employed varied in two dimensions. First, they differed in complexity from average to highly demanding. Second, we used two types of tasks, which required either only retention of stimulus set or retention and manipulation of the content. We expected to reveal EEG correlates of temporary storage and central executive components of WM and to assess their contribution to individual differences...
February 13, 2017: BMC Neuroscience
https://www.readbyqxmd.com/read/28192762/neural-mass-models-describing-possible-origin-of-the-excessive-beta-oscillations-correlated-with-parkinsonian-state
#18
Chen Liu, Yulin Zhu, Fei Liu, Jiang Wang, Huiyan Li, Bin Deng, Chris Fietkiewicz, Kenneth A Loparo
In Parkinson's disease, the enhanced beta rhythm is closely associated with akinesia/bradykinesia and rigidity. An increase in beta oscillations (12-35 Hz) within the basal ganglia (BG) nuclei does not proliferate throughout the cortico-basal ganglia loop in uniform fashion; rather it can be subdivided into two distinct frequency bands, i.e. the lower beta (12-20 Hz) and upper beta (21-35 Hz). A computational model of the excitatory and inhibitory neural network that focuses on the population properties is proposed to explore the mechanism underlying the pathological beta oscillations...
January 30, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28179556/distinct-oscillatory-frequencies-underlie-excitability-of-human-occipital-and-parietal-cortex
#19
Jason Samaha, Olivia Gosseries, Bradley R Postle
Transcranial magnetic stimulation (TMS) of human occipital and posterior parietal cortex can give rise to visual sensations called phosphenes. We used near-threshold TMS with concurrent EEG recordings to measure how oscillatory brain dynamics covary, on single trials, with the perception of phosphenes after occipital and parietal TMS. Prestimulus power and phase, predominantly in the alpha band (8-13 Hz), predicted occipital TMS phosphenes, whereas higher-frequency beta-band (13-20 Hz) power (but not phase) predicted parietal TMS phosphenes...
March 15, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28179479/impaired-auditory-to-motor-entrainment-in-parkinson-s-disease
#20
Erik S Te Woerd, Robert Oostenveld, Floris Pieter De Lange, Peter Praamstra
Several electrophysiological studies suggest that PD patients have a reduced tendency to entrain to regular environmental patterns. Here we investigate whether this reduced entrainment concerns a generalized deficit or is confined to movement-related activity, leaving sensory entrainment intact. Magnetoencephalography (MEG) was recorded during a rhythmic auditory target detection task in 14 PD patients and 14 control subjects. Participants were instructed to press a button when hearing a target tone amidst an isochronous sequence of standard tones...
February 8, 2017: Journal of Neurophysiology
keyword
keyword
27167
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"