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51 results for “Activity rhythms”
Rhythms and Nocturnal Activities of Wood Ants in the Neuwied Basin, Germany 2010-2016
In situ activity patterns of two Formica-rufa group species (F. pratensis; F. polyctena) were continuously studied at four different red wood-ant nests during six months in each of the years 2010, 2011, 2012, and 2016 and related to weather factors and variations of the Earth’s magnetic field. In situ activity patterns of both species are similarly periodic and exhibit ultradian, and short and long infradian rhythms under natural Light:Dark conditions. Crepuscular and nocturnal activities ≤ 4-hr long were observed in both species, especially at the new moon and first quarter after the astronomical twilight in a period of darkness in fall. We hypothesize that local variability in Earth’s magnetic field affects long-term activity patterns, whereas humidity and temperature were more strongly associated with ultradian rhythms (less than 20 hr).
FIGURE 3 in Daily rhythm of locomotor and reproductive activity in the annual fish Garcialebias reicherti (Cyprinodontiformes: Rivulidae)
FIGURE 3 | Contextual modulation of locomotor activity of Garcialebias reicherti. Total daily locomotor activity for isolated (n = 10) and paired fish (n = 10). Each dot represents the mean number of events for each fish. *shows statistical significance (see p value in the main text). Box height from upper to lower quartile, whiskers represent standard deviation, median shown by horizontal line.
FIGURE 2 in Daily rhythm of locomotor and reproductive activity in the annual fish Garcialebias reicherti (Cyprinodontiformes: Rivulidae)
FIGURE 2 | Daily rhythm of locomotor activity in paired fish of Garcialebias reicherti recorded during four days in LD. A. Representative time series (actograms) and cosinor fit diagrams for two female (orange) and a male (green) dyads. Amount of locomotor activity (number of events) is normalized for visualization purposes. Gray areas in the actogram represent the dark phase of each 24 h period. The cosinor representation for each individual of the dyad is shown next to the actogram. Black outlines represent the duration of the night. The internal circumference depicts the p = 0.05 confidence limit. Radial lines show the extreme values of the acrophases calculated for each of six days. B. Rayleigh test for all paired individuals (5 males and 5 females) analyzed collectively. Triangles signal individual male acrophases, diamonds signal individual female acrophases. Members of each dyad are presented in the same color. The internal circumference depicts the p = 0.05 confidence limit and length of the black radial line marks the p value (external circumference is p = 0, see main text for p value). The black outline represents the duration of the night.
FIGURE 4 in Daily rhythm of locomotor and reproductive activity in the annual fish Garcialebias reicherti (Cyprinodontiformes: Rivulidae)
FIGURE 4 | Number and allocation of reproductive events at different hours in Garcialebias reicherti. Bars show the occurrence of events at different timepoints for each dyad (see references). Concentric circumferences show the number of events at that hour throughout the 4-day period. Black outline signals the duration of the night.
FIGURE 1 in Daily rhythm of locomotor and reproductive activity in the annual fish Garcialebias reicherti (Cyprinodontiformes: Rivulidae)
FIGURE 1 | Daily rhythm of locomotor activity in isolated fish of Garcialebias reicherti recorded during eight days in LD. A. Representative actograms and cosinor fit diagrams for a female (orange) and a male (green) fish. Amount of locomotor activity (number of events) is normalized for visualization purposes. Gray areas in the actogram represent the dark phase of each 24 h period. The cosinor representation for each individual is shown below the actogram. Black outlines represent the duration of the night. The internal circumference depicts the p = 0.05 confidence limit. Radial lines show the extreme values of the acrophases calculated for each of six days. B. Rayleigh test for all isolated individuals (5 males and 5 females) analyzed collectively. Triangles signal individual acrophases. The internal circumference depicts the p = 0.05 confidence limit and length of the black radial line marks the p value (external circumference is p = 0, see main text for p value). The black outline represents the duration of the night.
Fig. 1 in Living with the enemy: activity rhythms of the red fox Vulpes vulpes (Carnivora, Canidae) and some potential preys in an urban environment
Fig. 1 - Satellite view of the municipal area of Padua and location of the camera traps. / Immagine satellitare del territorio comunale di Padova e posizione delle trappole fotografiche (Image/Immagine: Google Satellite).
Fig. 2 in Living with the enemy: activity rhythms of the red fox Vulpes vulpes (Carnivora, Canidae) and some potential preys in an urban environment
Fig. 2 - Temporal activity overlap between the red fox and its potential preys. The shaded area under the two density estimates represents the overlap coefficient. / Sovrapposizione dell'attività temporale tra la volpe rossa e le sue potenziali prede. L'area ombreggiata sotto le due stime di densità rappresenta il coefficiente di sovrapposizione.
Figure 1 in Daily activity rhythm of the African stingless bee Hypotrigona gribodoi (Hymenoptera: Meliponini) in the dry season, with notes on nest structure and colony composition
Figure 1. Numbers of bees departing from the nest (black) and returning throughout daylight hours. Returning bees are separated into those without (white) and with (gray) loaded pollen baskets
Рис. 3. Ритм ночной активности паукообразных Mesobuthus eupeus, Galeodes araneoides, Lycosa praegrandis. Fig. 3. The rhythm of the night activity of arachnids Mesobuthus eupeus, Galeodes araneoides, Lycosa praegrandis. in Comparison of trophic spectra and hunting strategies of some large arachnids (Arachnida: Scorpiones, Solifugae, Aranei) in semi-desert biocenoses of Gobustan (Eastern Azerbaijan)
Рис. 3. Ритм ночной активности паукообразных Mesobuthus eupeus, Galeodes araneoides, Lycosa praegrandis. Fig. 3. The rhythm of the night activity of arachnids Mesobuthus eupeus, Galeodes araneoides, Lycosa praegrandis.
Data from: Beyond rhythm - a framework for understanding the frequency spectrum of neural activity
<p>Cognitive and behavioral processes are often accompanied by changes within well-defined frequency bands of the local field potential (LFP i.e., the voltage induced by neuronal activity). These changes are detectable in the frequency domain using the Fourier transform and are often interpreted as neuronal oscillations. However, aside some well-known exceptions, the processes underlying such changes are difficult to track in time, making their oscillatory nature hard to verify. In addition, many non-periodic neural processes can also have spectra that emphasize specific frequencies. Thus, the notion that spectral changes reflect oscillations is likely too restrictive. In this study, we use a simple yet versatile framework to understand the frequency spectra of neural recordings. Using simulations, we derive the Fourier spectra of periodic, quasi-periodic and non-periodic neural processes having diverse waveforms, illustrating how these attributes shape their spectral signatures. We then show how neural processes sum their energy in the local field potential in simulated and real-world recording scenarios. We find that the spectral power of neural processes is essentially determined by two aspects: 1) the distribution of neural events in time and 2) the waveform of the voltage induced by single neural events. Taken together, this work guides the interpretation of the Fourier spectrum of neural recordings and indicates that power increases in specific frequency bands do not necessarily reflect periodic neural activity.</p>
Data from: Beyond rhythm - a framework for understanding the frequency spectrum of neural activity
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Mesolimbic dopamine neurons drive infradian rhythms in sleep-wake and heightened activity state
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Data from: Responses of activity rhythms to temperature cues evolve in Drosophila populations selected for divergent timing of eclosion
Even though the rhythm in adult emergence and rhythm in locomotor activity are two different rhythmic phenomena that occur at distinct life-stages of the fly life cycle, previous studies have hinted at similarities in certain aspects of the organisation of the circadian clock driving these two rhythms. For instance, the period gene plays an important regulatory role in both rhythms. In an earlier study, we have shown that selection on timing of adult emergence behaviour in populations of Drosophila melanogaster leads to the co-evolution of temperature sensitivity of circadian clocks driving eclosion. In this study, we were interested in asking if temperature sensitivity of the locomotor activity rhythm has evolved in our populations with divergent timing of adult emergence rhythm, with the goal of understanding the extent of similarity (or lack of it) in circadian organisation between the two rhythms. We found that in response to simulated jetlag with temperature cycles, late chronotypes (populations selected for predominant emergence during dusk) indeed re-entrain faster than early chronotypes (populations selected for predominant emergence during dawn) to 6-h phase-delays, thereby indicating enhanced sensitivity of the activity/rest clock to temperature cues in these stocks (entrainment is the synchronisation of internal rhythms to cyclic environmental time-cues). Additionally, we found that late chronotypes show higher plasticity of phases across regimes, day-to-day stability in phases and amplitude of entrainment, all indicative of enhanced temperature sensitive activity/rest rhythms. Our results highlight remarkably similar organisation principles between emergence and activity/rest rhythms.
Dataset and code for the study 'Heatwave effects on diel rhythms of insect activity: a comparison across habitats'
<p>Contained here are the csv dataset and R analysis code script underlying the report <em>Heatwave effects on diel rhythms of insect activity: a comparison across habitat</em>s. See <strong>metadata.pdf</strong> for details on the methodology, dataset and script.</p> <p> </p> <h3><strong>Version history</strong></h3> <table> <tbody> <tr> <td><strong>Version</strong></td> <td><strong>Date uploaded</strong></td> <td><strong>Changes made</strong></td> </tr> <tr> <td>v3</td> <td>9th March 2025</td> <td>Edited <strong>insect_script.R </strong>– for all plots with Wald 95% confidence intervals, added dashed lines to demarcate the edges of the shaded bands showing the confidence intervals, to make them more visible for colourblind readers.</td> </tr> <tr> <td>v2</td> <td>2nd March 2025</td> <td> <p>Edited <strong>metadata.pdf</strong> - added citation for key used for insect identification.</p> </td> </tr> <tr> <td>v1</td> <td>31st October 2024</td> <td>[Original upload]</td> </tr> </tbody> </table>
Data and supplementary information: Effects of lithium on locomotor activity and circadian rhythm of honey bees
<p>Data and supplementary files for publication:</p><p>Erdem, B., Arslan, O.C., Sevin, S. Gozen, A. G., Agosto-Rivera, J. L., Tugrul, G., & Alemdar, H. (2023). Effects of lithium on locomotor activity and circadian rhythm of honey bees. <i>Scientific Reports</i>, <i>13,</i> 19861. https://doi.org/10.1038/s41598-023-46777-7</p><p> </p><p>AcuteExp_Dark_ActivityData.xlsx - Total LMA counts of acute experiment in dark condition.</p><p>AcuteExp_Light_ActivityData.xlsx - Total LMA counts of acute experiment in light condition.</p><p>ChronicExp_ActivityData.xlsx - Total LMA counts of the chronic experiment.</p><p>ChronicExp_MortalityData.xlsx - Mortality data of the chronic experiment.</p><p>ChronicExp_PeriodRhytmData.xlsx - Defines rhythmic and arrhythmic individuals and the circadian periods (h) of the rhythmic individuals in chronic experiment.</p><p>LD_doubleplots.pdf - Double-plotted actograms of the individuals in the chronic experiment in the 12 h light / 12 h dark condition.</p><p>DD_doubleplots.pdf - Double-plotted actograms of the individuals in the chronic experiment in the constant dark condition.</p><p>LL_doubleplots.pdf - Double-plotted actograms of the individuals in the chronic experiment in the constant light condition.<br>In the double-plotted actograms, NR indicates "non-rhythmic" individuals.</p>
Feasibility of Bright Light Therapy on Fatigue, Sleep and Circadian Activity Rhythms in Lung Cancer Survivors
ClinicalTrials.gov study NCT02954809. IPD Sharing: NO. Countries: 1. Publications: 5.
Data from: Responses of activity rhythms to temperature cues evolve in Drosophila populations selected for divergent timing of eclosion
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Data from: Ultradian rhythms of activity in a wild subterranean rodent
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Rest-activity daily rhythm and physical activity levels after hip and knee joint replacement: the role of actigraphy in orthopedic clinical practice.
<p>Elective hip and knee joint replacement for osteoarthritis are cost-effective surgical procedures requiring specific rehabilitation programs. Actigraphy is widely used in both research and clinical practice to study activity patterns with great accuracy and validity but it has never been utilized in orthopedic patients. Therefore, the aim of this study was to objectively assess, through actigraphy, physical activity (PA) levels and rest-activity daily rhythm (RAR) in patients undergoing hip or knee joint replacement and hospitalized for ten days after surgery. Twenty subjects (11 males and 9 females; age: 62.68 ± 10.39 years old; BMI: 29.03 ± 3.92 kg/m2) wore the Actiwatch 2 actigraph (Philips Respironics, Portland, OR) to record both PA levels and RAR for 11 consecutive days and data on subjective scores of pain, by a visual analog scale (VAS), and functional and clinical scores were collected. The following time-points were considered for the statistical analysis: pre-surgery (PRE), the first (POST1), the fourth (POST4) and the tenth (POST10) day after surgery. RAR were processed with the population mean cosinor to describe the rhythm's characteristics (acrophase, amplitude and MESOR) while data on actigraphy-based PA, VAS, and functional clinical scores were compared among PRE, POST1, POST4 and POST 10 with the RM-ANOVA or the non-parametric Friedman test. The day after surgery the subjects had a flattened RAR compared to the other conditions: lower values were detected in POST1 compared to both PRE, POST4 and POST10 for MESOR (<em>p</em> < .0001; η2p = .71, large) and amplitude (<em>p</em> < .0001; η2p = .63, large) while RAR's acrophase (<em>p</em> < .0001; η2p = .61, large) was delayed in PRE (16:45) compared to POST1 (12:42), POST4 (14:38), and POST10 (14:38). PA levels were significantly lower at POST 1 (76.7 ± 33.4) compared to PRE (192.3 ± 91.5; <em>p</em> < .0001 and ES: 1.68, large), POST4 (137.9 ± 45.9; <em>p</em> < .0001 and ES: 1.54, large), and POST10 (131.2 ± 54.3; <em>p</em> < .0001 and ES: 1.21, large) whereas VAS and functional clinical values significantly improved at POST10. Hip and knee joint replacement negatively influenced RAR and PA the first day after surgery but a progressive improvement in the circadian pattern of rest-activity cycle, PA levels, VAS and functional ability was recorded from POST4 to POST10. Actigraphy has the ability to collect real-life data without interfering with clinical practice and give clinicians a new measure of performance that is currently not available. This tool could allow to identify patients with disrupted circadian rhythm and reduced PA in the peri-operative period in orthopedic surgery, and timely intervene on these subjects with personalized rehabilitative intervention.</p>
The Effects of Lumbopelvic Rhythm on Postural Control, Daily Activities, and Quality of Life in Individuals With AIS
ClinicalTrials.gov study NCT07391488. IPD Sharing: NO. Countries: 1. Publications: 6.
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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.
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DANDI Archive for NWB datasets
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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.