249 results match your criteria 4-8 rhythms

Implications of Argentine Tango for Health Promotion, Physical Well-Being as Well as Emotional, Personal and Social Life on a Group of Women Who Dance.

Int J Environ Res Public Health 2021 May 31;18(11). Epub 2021 May 31.

Department of Basic Biomedical Science, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, 41-200 Sosnowiec, Poland.

Background: The aim of the research was to determine the effect that dance has on the promotion of health, physical well-being, as well as the emotional, personal and social life of women who dance. In addition, the impact of the physical activity of long, often all-night dancing events on women's health was investigated. This included possible disturbances in their monthly cycle and circadian rhythm, taking into account symptoms of biological rhythm disturbances. Read More

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Peripheral immune circadian variation, synchronisation and possible dysrhythmia in established type 1 diabetes.

Diabetologia 2021 May 18. Epub 2021 May 18.

Indiana University Center for Diabetes and Metabolic Diseases, Indianapolis, IN, USA.

Aims/hypothesis: The circadian clock influences both diabetes and immunity. Our goal in this study was to characterise more thoroughly the circadian patterns of immune cell populations and cytokines that are particularly relevant to the immune pathology of type 1 diabetes and thus fill in a current gap in our understanding of this disease.

Methods: Ten individuals with established type 1 diabetes (mean disease duration 11 years, age 18-40 years, six female) participated in a circadian sampling protocol, each providing six blood samples over a 24 h period. Read More

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A population-based prospective study on rest-activity rhythm and mild cognitive impairment among Hong Kong healthy community-dwelling older adults.

Neurobiol Sleep Circadian Rhythms 2021 May 16;10:100065. Epub 2021 Apr 16.

JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong Special Administrative Region.

Background: Relatively few studies investigated the association between rest-activity circadian rhythm and cognitive impairment in population-based study, and the evidence from Asian populations is sparse. We aimed to examine the relationship of actigraphy measured rest-activity circadian rhythm with mild cognitive impairment (MCI) or cognitive impairment in Hong Kong healthy community-dwelling older adults.

Methods: We recruited 174 Hong Kong healthy adults aged ≥65 years (36 male vs. Read More

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Measures of resting state EEG rhythms for clinical trials in Alzheimer's disease: Recommendations of an expert panel.

Alzheimers Dement 2021 Apr 15. Epub 2021 Apr 15.

School of Psychology, University of Glasgow, Glasgow, UK.

The Electrophysiology Professional Interest Area (EPIA) and Global Brain Consortium endorsed recommendations on candidate electroencephalography (EEG) measures for Alzheimer's disease (AD) clinical trials. The Panel reviewed the field literature. As most consistent findings, AD patients with mild cognitive impairment and dementia showed abnormalities in peak frequency, power, and "interrelatedness" at posterior alpha (8-12 Hz) and widespread delta (< 4 Hz) and theta (4-8 Hz) rhythms in relation to disease progression and interventions. Read More

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EEG measures for clinical research in major vascular cognitive impairment: recommendations by an expert panel.

Neurobiol Aging 2021 Jul 10;103:78-97. Epub 2021 Mar 10.

Centre for Healthy Brain Ageing (CHeBA), School of Psychiatry, University of New South Wales; Neuropsychiatric Institute, The Prince of Wales Hospital, Sydney, Australia.

Vascular contribution to cognitive impairment (VCI) and dementia is related to etiologies that may affect the neurophysiological mechanisms regulating brain arousal and generating electroencephalographic (EEG) activity. A multidisciplinary expert panel reviewed the clinical literature and reached consensus about the EEG measures consistently found as abnormal in VCI patients with dementia. As compared to cognitively unimpaired individuals, those VCI patients showed (1) smaller amplitude of resting state alpha (8-12 Hz) rhythms dominant in posterior regions; (2) widespread increases in amplitude of delta (< 4 Hz) and theta (4-8 Hz) rhythms; and (3) delayed N200/P300 peak latencies in averaged event-related potentials, especially during the detection of auditory rare target stimuli requiring participants' responses in "oddball" paradigms. Read More

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Distinct contributions of alpha and theta rhythms to perceptual and attentional sampling.

Eur J Neurosci 2021 Feb 20. Epub 2021 Feb 20.

Institute of Psychology, University of Münster, Münster, Germany.

Accumulating evidence suggests that visual perception operates in an oscillatory fashion at an alpha frequency (around 10 Hz). Moreover, visual attention also seems to operate rhythmically, albeit at a theta frequency (around 5 Hz). Both rhythms are often associated to "perceptual snapshots" taken at the favorable phases of these rhythms. Read More

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February 2021

Clinical Benefits of Circadian-based Antioxidant Protection and Repair.

J Drugs Dermatol 2020 Dec;19(12):1209-1214

Skin activities follow endogenous circadian rhythms resulting in differences between daytime and nighttime properties. To address the variations in skin needs, a novel circadian-based dual serum system (LVS) was developed. A 12-week, double-blind, randomized, regimen-controlled, multi-center study was conducted to assess the efficacy and tolerability of LVS on subjects presenting with moderate-severe photodamage. Read More

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December 2020

EEG alpha-theta dynamics during mind wandering in the context of breath focus meditation: An experience sampling approach with novice meditation practitioners.

Eur J Neurosci 2021 Mar 18;53(6):1855-1868. Epub 2020 Dec 18.

Department of Rehabilitation Sciences, Research Group for Neurorehabilitation, University of Leuven, KU Leuven, Leuven, Belgium.

Meditation practice entails moments of distraction dominated by self-generated thoughts (i.e. mind wandering). Read More

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Disruption of Physiological Rhythms Persist Following Cessation of Cigarette Smoke Exposure in Mice.

Front Physiol 2020 21;11:501383. Epub 2020 Oct 21.

Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, ON, Canada.

Background: Physiological rhythms in mammals are essential for maintaining health, whereas disruptions may cause or exacerbate disease pathogenesis. As such, our objective was to characterize how cigarette smoke exposure affects physiological rhythms of otherwise healthy mice using telemetry and cosinor analysis.

Methods: Female BALB/c mice were implanted with telemetry devices to measure body temperature, heart rate, systolic blood pressure (SBP), and activity. Read More

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October 2020

Effects of COVID-19 pandemic on out-of-hospital cardiac arrests: A systematic review.

Resuscitation 2020 12 29;157:241-247. Epub 2020 Oct 29.

Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Milan, Italy; Faculty of Medicine, Vita-Salute San Raffaele University, Milan, Italy.

Introduction: In addition to the directly attributed mortality, COVID-19 is also likely to increase mortality indirectly. In this systematic review, we investigate the direct and indirect effects of COVID-19 on out-of-hospital cardiac arrests.

Methods: We searched PubMed, BioMedCentral, Embase and the Cochrane Central Register of Controlled Trials for studies comparing out-of-hospital cardiac arrests occurring during the pandemic and a non-pandemic period. Read More

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December 2020

Resting-state electroencephalographic delta rhythms may reflect global cortical arousal in healthy old seniors and patients with Alzheimer's disease dementia.

Int J Psychophysiol 2020 12 17;158:259-270. Epub 2020 Oct 17.

Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, Rome, Italy.

Extending Başar's theory of event-related EEG oscillations, here we hypothesize that even in quiet wakefulness, transient increases in delta rhythms may enhance global cortical arousal as revealed by the desynchronization of alpha rhythms in normal (Nold) seniors with some derangement in Alzheimer's disease dementia (ADD). Clinical and EEG datasets in 100 ADD and 100 Nold individuals matched as demography, education, and gender were taken from an international archive. Standard delta (< 4 Hz) and alpha1 (8-10. Read More

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December 2020

Phase-amplitude coupling profiles differ in frontal and auditory cortices of bats.

Eur J Neurosci 2020 Sep 26. Epub 2020 Sep 26.

Institut für Zellbiologie und Neurowissenschaft, Goethe-Universität, Frankfurt/M, Germany.

Neural oscillations are at the core of important computations in the mammalian brain. Interactions between oscillatory activities in different frequency bands, such as delta (1-4 Hz), theta (4-8 Hz) or gamma (>30 Hz), are a powerful mechanism for binding fundamentally distinct spatiotemporal scales of neural processing. Phase-amplitude coupling (PAC) is one such plausible and well-described interaction, but much is yet to be uncovered regarding how PAC dynamics contribute to sensory representations. Read More

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September 2020

Accounting for Time: Circadian Rhythms in the Time of COVID-19.

J Biol Rhythms 2021 02 2;36(1):4-8. Epub 2020 Sep 2.

Institute of Translational Medicine and Therapeutics (ITMAT), University of Pennsylvania, Philadelphia, Pennsylvania.

The COVID-19 pandemic has necessitated novel approaches and collaborative efforts across multiple disciplines. It is known that various aspects of our physiology and response to pathogens are under tight clock control. However, the assimilation of circadian biology into our clinical and research practices is still evolving. Read More

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February 2021

Morning vs. evening administration of antiviral therapy in COVID-19 patients. A preliminary retrospective study in Ferrara, Italy.

Eur Rev Med Pharmacol Sci 2020 08;24(15):8219-8225

COVID-19 Internal Medicine Units (Clinica Medica, Medicina Interna Universitaria, Medicina Ospedaliera 2), Azienda Ospedaliero-Universitaria "S. Anna", Ferrara, Italy.

Objective: At the end of 2019, the Novel Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2), spread rapidly from China to the whole world. Circadian rhythms can play crucial role in the complex interplay between viruses and organisms, and temporized schedules (chronotherapy) have been positively tested in several medical diseases. We aimed to compare the possible effects of a morning vs. Read More

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Classification of Alzheimer's Disease with Respect to Physiological Aging with Innovative EEG Biomarkers in a Machine Learning Implementation.

J Alzheimers Dis 2020 ;75(4):1253-1261

Brain Connectivity Laboratory, Department of Neuroscience & Neurorehabilitation, IRCCS San Raffaele Pisana, Rome, Italy.

Background: Several studies investigated clinical and instrumental differences to make diagnosis of dementia in general and in Alzheimer's disease (AD) in particular with the aim to classify, at the individual level, AD patients and healthy controls cooperating with neuropsychological tests for an early diagnosis. Advanced network analysis of electroencephalographic (EEG) rhythms provides information on dynamic brain connectivity and could be used in classification processes. If successfully reached, this goal would add a low-cost, easily accessible, and non-invasive technique with neuropsychological tests. Read More

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Neural oscillations in the fronto-striatal network predict vocal output in bats.

PLoS Biol 2020 03 19;18(3):e3000658. Epub 2020 Mar 19.

Auditory Computations lab, Institute for Cell Biology and Neuroscience, Goethe University, Frankfurt am Main, Germany.

The ability to vocalize is ubiquitous in vertebrates, but neural networks underlying vocal control remain poorly understood. Here, we performed simultaneous neuronal recordings in the frontal cortex and dorsal striatum (caudate nucleus, CN) during the production of echolocation pulses and communication calls in bats. This approach allowed us to assess the general aspects underlying vocal production in mammals and the unique evolutionary adaptations of bat echolocation. Read More

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Constrained Structure of Ancient Chinese Poetry Facilitates Speech Content Grouping.

Curr Biol 2020 04 5;30(7):1299-1305.e7. Epub 2020 Mar 5.

Division of Arts and Sciences, New York University Shanghai, Shanghai 200122, China; NYU-ECNU Institute of Brain and Cognitive Science at NYU Shanghai, Shanghai 200062, China; Key Laboratory of Brain Functional Genomics (MOE & STCSM), Shanghai Changning-ECNU Mental Health Center, Institute of Cognitive Neuroscience, School of Psychology and Cognitive Science, East China Normal University, Shanghai 200062, China. Electronic address:

Ancient Chinese poetry is constituted by structured language that deviates from ordinary language usage [1, 2]; its poetic genres impose unique combinatory constraints on linguistic elements [3]. How does the constrained poetic structure facilitate speech segmentation when common linguistic [4-8] and statistical cues [5, 9] are unreliable to listeners in poems? We generated artificial Jueju, which arguably has the most constrained structure in ancient Chinese poetry, and presented each poem twice as an isochronous sequence of syllables to native Mandarin speakers while conducting magnetoencephalography (MEG) recording. We found that listeners deployed their prior knowledge of Jueju to build the line structure and to establish the conceptual flow of Jueju. Read More

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A biophysical model of striatal microcircuits suggests gamma and beta oscillations interleaved at delta/theta frequencies mediate periodicity in motor control.

PLoS Comput Biol 2020 02 25;16(2):e1007300. Epub 2020 Feb 25.

Department of Mathematics & Statistics, Boston University, Boston, Massachusetts, United States of America.

Striatal oscillatory activity is associated with movement, reward, and decision-making, and observed in several interacting frequency bands. Local field potential recordings in rodent striatum show dopamine- and reward-dependent transitions between two states: a "spontaneous" state involving β (∼15-30 Hz) and low γ (∼40-60 Hz), and a state involving θ (∼4-8 Hz) and high γ (∼60-100 Hz) in response to dopaminergic agonism and reward. The mechanisms underlying these rhythmic dynamics, their interactions, and their functional consequences are not well understood. Read More

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February 2020

Frontal theta and beta oscillations during lower-limb movement in Parkinson's disease.

Clin Neurophysiol 2020 03 13;131(3):694-702. Epub 2020 Jan 13.

Neurology Department, University of Iowa, Iowa City, IA, USA.

Objectives: Patients with Parkinson's disease (PD) have deficits in lower-limb functions such as gait, which involves both cognitive and motor dysfunction. In PD, theta and beta brain rhythms are associated with cognitive and motor functions, respectively. We tested the hypothesis that PD patients with lower-limb abnormalities would exhibit abnormal theta and beta rhythms in the mid-frontal cortical region during lower-limb action. Read More

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Exercise effects on brain and behavior in healthy mice, Alzheimer's disease and Parkinson's disease model-A systematic review and meta-analysis.

Behav Brain Res 2020 04 25;383:112488. Epub 2020 Jan 25.

Programa de Pós-Graduação em Ciências Médicas, Universidade Federal do Ceará, Fortaleza, Brazil; Sleep and Biological Rhythms Laboratory, UFC, Brazil; Universidade Federal do Ceará (UFC), Brazil. Electronic address:

This systematic review and meta-analysis examines how exercise modifies brain and behavior in healthy mice, dementia (D) and Parkinson disease (PD) models. A search was performed on the Medline and Scopus electronic databases (2008-2019). Search terms were "mice", "brain", "treadmill", "exercise", "physical exercise". Read More

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Transcranial alternating current stimulation in the theta band but not in the delta band modulates the comprehension of naturalistic speech in noise.

Neuroimage 2020 04 20;210:116557. Epub 2020 Jan 20.

Department of Bioengineering and Centre for Neurotechnology, Imperial College London, South Kensington Campus, SW7 2AZ, London, UK. Electronic address:

Auditory cortical activity entrains to speech rhythms and has been proposed as a mechanism for online speech processing. In particular, neural activity in the theta frequency band (4-8 ​Hz) tracks the onset of syllables which may aid the parsing of a speech stream. Similarly, cortical activity in the delta band (1-4 ​Hz) entrains to the onset of words in natural speech and has been found to encode both syntactic as well as semantic information. Read More

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The association between abuse history in childhood and salivary rhythms of cortisol and DHEA in postmenopausal women.

Psychoneuroendocrinology 2020 02 14;112:104515. Epub 2019 Nov 14.

Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, United States; Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida, United States.

A history of child abuse (CA) is associated with morbidity and mortality in adulthood, and one proposed mechanism is dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis. Therefore, we evaluated whether a history of physical and sexual CA was associated with daily rhythms of HPA hormones (cortisol and dehydroepiandrosterone (DHEA)) among postmenopausal women (mean age: 60.6 years). Read More

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February 2020

Regression-based reconstruction of human grip force trajectories with noninvasive scalp electroencephalography.

J Neural Eng 2019 11 6;16(6):066030. Epub 2019 Nov 6.

Department of Electrical and Computer Engineering from the University of Houston, Houston, TX 77204, United States of America.

Objective: Robotic devices show promise in restoring motor abilities to individuals with upper limb paresis or amputations. However, these systems are still limited in obtaining reliable signals from the human body to effectively control them. We propose that these robotic devices can be controlled through scalp electroencephalography (EEG), a neuroimaging technique that can capture motor commands through brain rhythms. Read More

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November 2019

Synchronization between frontal eye field and area V4 during free-gaze visual search.

Zool Res 2019 Sep;40(5):394-403

Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen Guangdong 518055, China;

Information flow between the prefrontal and visual cortices is critical for visual behaviors such as visual search. To investigate its mechanisms, we simultaneously recorded spike and local field potential (LFP) signals in the frontal eye field (FEF) and area V4 while monkeys performed a free-gaze visual search task. During free-gaze search, spike-LFP coherence between FEF and V4 was enhanced in the theta rhythm (4-8 Hz) but suppressed in the alpha rhythm (8-13 Hz). Read More

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September 2019

Relationship between the Daily Rhythm of Distal Skin Temperature and Brown Adipose Tissue F-FDG Uptake in Young Sedentary Adults.

J Biol Rhythms 2019 10 7;34(5):533-550. Epub 2019 Aug 7.

PROFITH "PROmoting FITness and Health through physical activity" research group, Department of Physical and Sports Education, Sport and Health University Research Institute (iMUDS), Faculty of Sports Science, University of Granada, Granada, Spain.

The present study examines whether the daily rhythm of distal skin temperature (DST) is associated with brown adipose tissue (BAT) metabolism as determined by F-fluorodeoxyglucose (F-FDG) uptake in young adults. Using a wireless thermometer (iButton) worn on the nondominant wrist, DST was measured in 77 subjects (26% male; age 22 ± 2 years; body mass index 25.2 ± 4. Read More

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October 2019

Implications of Initial Recorded Rhythm on Cardioverter-Defibrillator Insertion and Subsequent All-Cause Mortality in Sudden Cardiac Arrest Survivors.

Am J Cardiol 2019 09 14;124(5):709-714. Epub 2019 Jun 14.

The Heart and Vascular Institute and the Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania. Electronic address:

Sudden cardiac arrest (SCA) rhythms have been traditionally divided into shockable [ventricular tachycardia (VT)/ventricular fibrillation (VF)] and nonshockable [(asystole (ASY)/pulseless electrical activity (PEA)] rhythms. It is unclear if the specific rhythm has implications on patient management and outcomes. We evaluated 1,433 patients who were admitted with SCA from 2000 to 2012 and were discharged alive. Read More

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September 2019

Tracking Transient Changes in the Neural Frequency Architecture: Harmonic Relationships between Theta and Alpha Peaks Facilitate Cognitive Performance.

J Neurosci 2019 08 7;39(32):6291-6298. Epub 2019 Jun 7.

Department of Rehabilitation Sciences, Group Biomedical Sciences, Neuromotor Rehabilitation Research Group, University of Leuven, KU Leuven, B-3001 Leuven, Belgium

The synchronization between neural oscillations at different frequencies has been proposed as a core mechanism for the coordination and integration of neural systems at different spatiotemporal scales. Because neural oscillations of different frequencies can only fully synchronize when their "peak" frequencies form harmonic relationships (e.g. Read More

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The effects of adrenaline in out of hospital cardiac arrest with shockable and non-shockable rhythms: Findings from the PACA and PARAMEDIC-2 randomised controlled trials.

Resuscitation 2019 07 19;140:55-63. Epub 2019 May 19.

Warwick Clinical Trials Unit, University of Warwick, Coventry, CV4 7AL, UK.

Introduction: Previous research suggests there may be differences in the effects of adrenaline related to the initial cardiac arrest rhythm. The aim of this study was to assess the effect of adrenaline compared with placebo according to whether the initial cardiac arrest rhythm was shockable or non-shockable.

Methods: Return of spontaneous circulation (ROSC), survival and neurological outcomes according to the initial arrest rhythm were compared amongst patients enrolled in the PARAMEDIC-2 randomised, placebo controlled trial. Read More

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Melatonin enhances autophagy and decreases apoptosis induced by nanosilica in RAW264.7 cells.

IUBMB Life 2019 07 24;71(7):1021-1029. Epub 2019 Apr 24.

Department of Pulmonary, Anhui Geriatric Institute, the First Affiliated Hospital of Anhui Medical University, Hefei, China.

Melatonin is one of the main hormones that regulate biological rhythms and have immunomodulation, anti-inflammatory, and antioxidation functions. In this study, we aimed to explore the effect of melatonin on the autophagy, apoptosis, and inflammatory reaction of macrophages (RAW264.7 cells) stimulated by nanosilica. Read More

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Automated external defibrillator accessibility is crucial for bystander defibrillation and survival: A registry-based study.

Resuscitation 2019 03 22;136:30-37. Epub 2019 Jan 22.

Department of Cardiology, Copenhagen University Hospital Gentofte, Hellerup, Denmark; Emergency Medical Services Copenhagen, University of Copenhagen, Denmark.

Aims: Optimization of automated external defibrillator (AED) placement and accessibility are warranted. We examined the associations between AED accessibility, at the time of an out-of-hospital cardiac arrest (OHCA), bystander defibrillation, and 30-day survival, as well as AED coverage according to AED locations.

Methods: In this registry-based study we identified all OHCAs registered by mobile emergency care units in Copenhagen, Denmark (2008-2016). Read More

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