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248 results for “rhythmicity”
Brazilian Rhythmic Instruments Dataset (BRID)
<p>The Brazilian Rhythmic Instruments Dataset (BRID) is a curated collection of audio recordings featuring traditional Brazilian rhythmic instruments, developed for Music Information Retrieval (MIR) research. It comprises 367 tracks, including 274 solo and 93 multi-instrument recordings, encapsulating ten instrument classes and five primary Brazilian rhythm styles: samba, partido alto, samba-enredo, capoeira, and marcha. BRID is suitable to study rhythm, beat tracking, and rhythmic pattern recognition in Brazilian music. </p>
Footactile rhythmics: protocols and data collection.
<p>The data shared refer to research investigating the relationship between human behaviour and space with the technological mediation of <em>footactile rhythms</em>.</p> <p>The documents describe the nine protocols devised and show the collection of qualitative (questionnaires) and quantitative (movement analysis, skin conductance) data.</p>
Data from: Molecular circadian rhythms are robust in marine annelids lacking rhythmic behavior
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Data for: Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle
<p><span>The existence and persistence of rhythmicity in animal activity during phases of environmental change is of interest in ecology and chronobiology. A wide diversity of biological rhythms in response to</span> <span>exogenous </span>conditions and internal stimuli have been uncovered, especially for polar vertebrates. However, empirical data supporting circadian organization of large ruminating herbivores remains inconclusive. <span>Using year-round tracking data of the largest Arctic ruminant, the muskox (</span><i>Ovibos moschatus</i><span>), we modelled rhythmicity as a function of behaviour and environmental conditions. Behavioural states were classified based on patterns in hourly movements, and incorporated within a periodicity analyses framework. We found that ultradian rhythmicity was prevalent when muskoxen were foraging and resting in mid-winter (continuous darkness). However, the probability of rhythmicity declined with increasing photoperiod until largely disrupted in mid-summer (continuous light). Individuals that remained rhythmic during mid-summer foraged in areas with lower plant productivity (NDVI) than arrhythmic individuals. We conclude that muskoxen may use internal time keeping when forage resources are low, but that the importance of this mechanism weakens once environmental conditions allow energetic reserves to be replenished. We argue that alimentary function and metabolic requirements are critical determinants of biological rhythmicity in muskoxen, which likely applies to ruminating herbivores in general. </span></p>
Cochlear activity in silent cue-target intervals shows a theta-rhythmic pattern and is correlated to attentional alpha and theta modulations
<p>Preprocessed data and analysis-scripts needed to reproduce the figures and statistics of the paper "Cochlear activity in silent cue-target intervals shows a theta-rhythmic pattern and is correlated to attentional alpha and theta modulations".</p>
Manipulation of complex objects dataset - Rhythmic Cup Task experiment
<p>This dataset contains raw data from a behavioral neuroscience experiment conducted at Northeastern University, Boston, MA, USA.</p> <p>Ten participants rhythmically manipulated a virtual cup containing a ball via a robotic manipulandum which controlled the cup position and provided haptic feedback of the force applied by the ball. The cup movement was constrained to 1 dimension. Participants were free to choose the frequency of oscillation, while the amplitude was imposed by visual constraints. The cup and ball system was represented mathematically by a cart and pendulum system. The following dimensions were used for the experiment: pendulum length = 0.45m, pendulum mass = 0.6kg, cart mass = 2.4kg.</p> <p>Each participant performed 5 blocks of 10 trials. For each data file, the first 2 letters identify (anonymously) a participant, the first number identifies the block and the second number identifies the trial within the block.</p> <p>The data are in Matlab data format. "RackPosition" (resp. Velocity, Acceleration) corresponds to the cart position (resp. velocity, acceleration). Y is the axis of the movement. "BallTheta" and "BallOmega" are the pendulum angular position and velocity. Please note that in this dataset angles are positive in clockwise direction (contrary to usual mechanical conventions). "BallForce" is the force applied by the pendulum on the cart.</p> <p>This experimental dataset was confronted to simulation results obtained with two different models. One ("Uncoupled Model") only simulates the dynamics of a cart and pendulum system (Matlab script "cup_task_uncoupled_model_inverde_dynamics.m" and "simulation_cup_task_uncoupled_model_inverse_dynamics.m"). Simulations of this Uncoupled Model are run using inverse dynamics, assuming a sinusoidal trajectory of the cart. The second model ("Coupled Model") includes a simplified model of hand dynamics, represented by an ideal force generator in parallel with a spring and a damper to simulate hand impedance (Matlab and Simulink scripts "cup_task_coupled_model.slx" and "simulation_coupled_model_forward_dynamics.m"). Simulations of this Coupled Model are run using forward dynamics</p> <p> </p>
The neural segmentation of linguistically relevant rhythmic patterns: Data and Code
<p>Materials used in "The neural segmentation of linguistically relevant rhythmic patterns".</p><ul><li>EEG dataset</li><li>Stimuli</li><li>Code used for experiment control (task)</li><li>Code used for statistical modeling</li><li>Code used for EEG and acoustic analyses</li><li>Code used for data visualization</li></ul>
Data from: Rhythmicity of neuronal oscillations delineates their cortical and spectral architecture
<p>Neuronal oscillations are commonly analyzed with power spectral methods that quantify signal amplitude, but not rhythmicity or 'oscillatoriness' per se. Here we introduce a new approach, the phase-autocorrelation function (pACF), for direct quantification of rhythmicity. We applied pACF to human intracerebral stereo-electroencephalography (SEEG) and magnetoencephalography (MEG) data and uncovered a spectrally and anatomically fine-grained cortical architecture in the rhythmicity of single- and multi-frequency neuronal oscillations. Evidencing the functional significance of rhythmicity, we found it to be a prerequisite for long-range synchronization in resting-state networks and to be dynamically modulated during event-related processing. We also extended the pACF approach to measure 'burstiness' of oscillatory processes and characterized regions with stable and bursty oscillations. These findings show that rhythmicity is double-dissociable from amplitude and constitutes a functionally relevant and dynamic characteristic of neuronal oscillations.</p>
The intestinal circadian clock drives microbial rhythmicity to maintain gastrointestinal homeostasis
<p><strong>Diurnal (<em>i.e.</em>, 24-hour) oscillations of the gut microbiome have been described in various species including mice and humans. However, the driving force behind these rhythms remains less clear. In this study, we differentiate between endogenous and exogenous time cues driving microbial rhythms.</strong> <strong>Our results demonstrate that fecal microbial oscillations are maintained in mice kept in the absence of light, supporting a role of the host’s circadian system rather than representing a diurnal response to environmental changes. Intestinal epithelial cell-specific ablation of the core clock gene <em>Bmal1</em> disrupts rhythmicity of microbiota. Targeted metabolomics functionally link intestinal clock-controlled bacteria to microbial-derived products, in particular branched-chain fatty acids and secondary bile acids. Microbiota transfer from intestinal clock-deficient mice into germ-free mice altered intestinal gene expression, enhanced lymphoid organ weights and suppressed immune cell recruitment. These results highlight the importance of functional intestinal clocks for circadian microbiota composition and function, which is required to balance the host’s gastrointestinal homeostasis. </strong></p>
Endogenous rhythmic growth modulates priming of antiherbivore defenses in subsequently formed new leaves of oak trees
<ul> <li>Priming of plant defenses provides increased plant protection against herbivores and reduces the allocation costs of defense. Defense priming in woody plants remains obscure, in particular due to plant development traits such as the endogenous rhythmic growth displayed by oaks (<em>Quercus robur</em>).</li> <li>By using bioassays with oak microcuttings, and by combining transcriptomic and metabolomic analyses, we investigated how leaf herbivory by <em>Lymantria dispar</em> and root inoculation with the ectomycorrhizal fungus <em>Piloderma croceum</em> prime oak defenses. We further investigated how defense priming is modulated by rhythmic growth of the oaks.</li> <li>A first herbivory challenge in oak leaves primed newly grown leaves for an enhanced induction of jamonic acid (JA)-related direct defenses, or enhanced emission of volatiles, depending on the specific growth stage at which the plants where challenged. Root inoculation with <em>Piloderma</em> abolished the enhanced induction of JA-related defenses and volatile emission.</li> <li>Our results indicate that a first herbivore attack primes direct and indirect defenses of newly formed oak leaves, and that the specific display of defense priming is modulated by rhythmic growth. Our results further show that the priming memory in oaks can be transmitted to the next growth cycle - even to the leaves of the new shoot unit.</li> </ul>
Groove in drum patterns as a function of both rhythmic properties and listeners' attitudes
<p>Data set for article "Groove in drum patterns as a function of both rhythmic properties and listeners' attitudes".</p>
Modulation of Cognitive Control Signals in Prefrontal Cortex by Rhythmic Transcranial Magnetic Stimulation
ClinicalTrials.gov study NCT03828734. IPD Sharing: Not stated. Countries: 1. Publications: 13.
Rhythmic Light Therapy for Alzheimer's Disease Patients
ClinicalTrials.gov study NCT05015478. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Data from: Phagocytosed photoreceptor outer segment particles within the retinal pigment epithelium show diurnal rhythmicity and variation between cone subtypes in larval zebrafish
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Data from: Diel rhythmicity of activity and corticosterone metabolites in Arctic barnacle geese during breeding
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Data from: Rhythmicity of neuronal oscillations delineates their cortical and spectral architecture
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Brief personalised rhythmic auditory stimulation facilitates cognitive and neural processing in ageing
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Data for: Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle
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High resolution diel transcriptomes of autotetraploid potato reveal expression and sequence conservation among rhythmic genes
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Data from: The rhythm of attention: perceptual modulation via rhythmic entrainment is lowpass and attention mediated
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.