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Dataset results
307 results for “circadian rhythms”
Investigating Circadian Rhythms in Youth With Persistent Tic Disorders
ClinicalTrials.gov study NCT03508245. IPD Sharing: NO. Countries: 1. Publications: 3.
Effects of Kangaroo Care on Circadian Rhythm, Growth and Physiological Effects
ClinicalTrials.gov study NCT06589349. IPD Sharing: NO. Countries: 1. Publications: 4.
Aspirin AM or PM: Effect on Circadian Rhythm of Platelet Reactivity
ClinicalTrials.gov study NCT01900639. IPD Sharing: Not stated. Countries: 1. Publications: 5.
A Cohort Study on Treating Primary Nocturnal Enuresis by Regulating Central-Peripheral Circadian Rhythm
ClinicalTrials.gov study NCT07003126. IPD Sharing: NO. Countries: 1. Publications: 1.
The Daytime Circadian Rhythm in Exhaled Volatile Organic Compounds in People Living Without and Diabetes
ClinicalTrials.gov study NCT05984979. IPD Sharing: NO. Countries: 1. Publications: 0.
Circadian Rhythm Disruption in the Hospital Intensive Care Environment
ClinicalTrials.gov study NCT05828680. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Factors Associated With Infant Circadian Rhythm, Growth, and Temperament
ClinicalTrials.gov study NCT05700136. IPD Sharing: NO. Countries: 1. Publications: 1.
"Cancersensor": Circadian Rhythms
ClinicalTrials.gov study NCT01693835. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Circadian Rhythms and Sleep in Familial DSPS and ASPS
ClinicalTrials.gov study NCT00246454. IPD Sharing: NO. Countries: 1. Publications: 6.
Data from: Optimal sampling interval for characterisation of the circadian rhythm of body temperature in homeothermic animals using periodogram and cosinor analysis
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Arginine-vasopressin expressing neurons in the murine suprachiasmatic nucleus exhibit a circadian rhythm in network coherence in vivo
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Characterizing the modern light environment and its influence on circadian rhythms
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Data from: Developmental exposure to PCB153 (2,2’,4,4’,5,5’-hexachlorobiphenyl) alters circadian rhythms and the expression of clock and metabolic genes
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Data from: Circadian rhythms vary over the growing season and correlate with fitness components
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Superoxide is promoted by sucrose and affects amplitude of circadian rhythms in the evening
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Figure 2 from: Krichilsky E, Vega-Hidalgo Á, Hunter K, Kingwell C, Ritner C, Wcislo W, Smith A (2020) The first gynandromorph of the Neotropical bee Megalopta amoena (Spinola, 1853) (Halictidae) with notes on its circadian rhythm. Journal of Hymenoptera Research 75: 97-108. https://doi.org/10.3897/jhr.75.47828
Figure 2 Single-plot actogram of four days of activity in dark-dark conditions showing a female, the gynandromorph, and a male M. amoena. Each bar represents the amount of times that the bee crossed the laser in a 15 minute interval. White space indicates lack of activity.
Figure 1 from: Krichilsky E, Vega-Hidalgo Á, Hunter K, Kingwell C, Ritner C, Wcislo W, Smith A (2020) The first gynandromorph of the Neotropical bee Megalopta amoena (Spinola, 1853) (Halictidae) with notes on its circadian rhythm. Journal of Hymenoptera Research 75: 97-108. https://doi.org/10.3897/jhr.75.47828
Figure 1 A Frontal view of the head showing the bilateral split between sexes (female left side of image, male right side) B detail of female (left) and male (right) mandibles and labrum, frontal view. Lateral view of the C male and D female genae and mandibles E ventral view of gynandromorph (female left side of image, male right side). Femur, apical spines, and tibia of F male and G female hindlegs H dorsal view of stinger I ventral view of metasoma (female left side of image, male right side). Scale bars: 500 μm.
Data from: Eyeless Mexican cavefish save energy by eliminating the circadian rhythm in metabolism
The eyed surface form and eyeless cave form of the Mexican tetra Astyanax mexicanus experience stark differences in the daily periodicities of light, food and predation, factors which are likely to have a profound influence on metabolism. We measured the metabolic rate of Pachón cave and surface fish at a fixed swimming speed under light/dark and constant dark photoperiods. In constant darkness surface forms exhibited a circadian rhythm in metabolism with an increase in oxygen demand during the subjective daytime, whereas cave forms did not. The lack of circadian rhythm in metabolism leads to a 27% energy savings for Pachón cave fish compared to surface fish when comparing both forms in their natural photoperiods. When surface forms were tested under constant dark conditions they expended 38% more energy than cave forms under equivalent conditions. Elimination of the circadian rhythm in metabolism may be a general feature of animals that live in perpetually dark food-limited environments such as caves or the deep sea.
Data from: Costs of sleeping in: circadian rhythms influence cuckoldry risk in a songbird
1. Circadian (i.e. daily) regulation of behaviors is thought to provide fitness benefits to organisms by enabling them to anticipate diel changes in the environment, such as sunrise. 2. A common behavior among socially monogamous songbirds that usually takes place in the early mornings is extra-pair mating, i.e. copulating with partners outside of the social pair bond. 3. Thus, variation in when individuals begin their daily activity may influence their reproductive success; early risers may be better able to gain copulations guard their partners thus minimizing their risk of being cuckolded compared to late risers. Sexual selection may thus play an important role in shaping circadian behaviors, but this assumption has yet to be tested in free-living animals. 4. Here we experimentally weakened endogenous circadian rhythmicity and thus anticipation of dawn in male great tits (Parus major) in the wild through the subcutaneous administration of implants filled with melatonin shortly before egg-laying began in this population; melatonin is a hormone released during the dark phase of the day, and is one important cue animals use to entrain their circadian clock. 5. Experimental individuals delayed onset of daily activity compared with controls, and were more likely to be cuckolded compared with control males. Manipulation did not alter other behavioral traits observed; no difference between treatments was observed in activity levels during the day or in the end time of daily activity. 6. These results strongly support the assumption that selection, particularly sexual selection, shapes circadian phenotypes of wild vertebrates which enable anticipation of important and predictive diel changes in an individual's biotic and abiotic environment.
Figure 6 from: Espinasa L, Collins E, Finocchiaro A, Kopp J, Robinson J, Rutkowski J (2016) Incipient regressive evolution of the circadian rhythms of a cave amphipod. Subterranean Biology 20: 1-13. https://doi.org/10.3897/subtbiol.20.10010
Figure 6 - Stygobromus allegheniensis has continuous light avoidance behavior which does not appear to follow circadian rhythmicity. White boxes indicate illuminated conditions.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.