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39 results for “Chronotype”
Spontaneous motor tempo over the course of a week: The role of the time of the day, chronotype, and arousal
<p>The spontaneous motor tempo (SMT) or internal tempo describes the natural pace of predictive and emergent movements such as walking or hand clapping. One of the main research interests in the study of the spontaneous motor tempo relates to factors affecting its pace. Previous studies suggest an influence of the circadian rhythm (i.e., 24-h cycle of the biological clock), physiological arousal changes, and potentially also musical experience. This study aimed at investigating these effects in participants‘ everyday life by measuring their SMT four times a day over seven consecutive days, using an experience sampling method. The pace of the SMT was assessed with a finger-tapping paradigm in a selfdeveloped web application. Measured as the inter-tap interval, the overall mean SMT was 650 ms (SD = 253 ms). Using multi-level modelling (MLM), results show that the pace of the SMT sped up over the course of the day, and that this effect depended on the participants’ chronotype, since participants tending towards morning type were faster in the morning compared to participants tending towards evening type. During the day, the pace of the SMT of morning types stayed relatively constant, whereas it became faster for evening-type participants. Furthermore, higher arousal in participants led to a faster pace of the SMT. Musical sophistication did not influence the SMT. These results indicate that the circadian rhythm influences the internal tempo, since the pace of SMT is not only dependent on the time of the day, but also on the individual entrainment to the 24-h cycle (chronotype).</p>
No relationship between chronotype and timing of breeding when variation in daily activity patterns across the breeding season is taken into account
<p>There is increasing evidence that individuals are consistent in the timing of their daily activities, and that individual variation in temporal behaviour is related to the timing of reproduction. However, it remains unclear whether observed patterns relate to the timing of the onset of activity or whether an early onset of activity extends the time that is available for foraging. This may then again facilitate reproduction. Furthermore, the timing of activity onset and offset may vary across the breeding season, which may complicate studying the above mentioned relationships. Here, we examined in a wild population of great tits (Parus major) whether an early clutch initiation date may be related to an early onset of activity and/or to longer active daylengths. We also investigated how these parameters are affected by the date of measurement. In order to test these hypotheses we measured emergence and entry time from/into the nest box as proxies for activity onset and offset in females during the egg laying phase. We then determined active daylength. Both emergence time and active daylength were related to clutch initiation date. However, a more detailed analysis showed that the timing of activities with respect to sunrise and sunset varied throughout the breeding season both within and among individuals. The observed positive relationships are hence potentially statistical artifacts. After methodologically correcting for this date effect, by using data from the pre-egg laying phase, where all individuals were measured on the same days, neither of the relationships remained significant. Taking methodological pitfalls and temporal variation into account may hence be crucial for understanding the significance of chronotypes.</p>
Fig. 1. Circular histogram rose plot showing Rhagoletis brncici and R in Differences in larval emergence chronotypes for sympatric Rhagoletis brncici Frías and Rhagoletis conversa (Bréthes) (Diptera, Tephritidae)
Fig. 1. Circular histogram rose plot showing Rhagoletis brncici and R. conversa larval emergence from fruit in a 24-h clock. For both graphs, the arrow shows the mean time of emergence. Main numbers in sections correspond to time in hours. Numbers accompanying circumferences refer to number of individual larvae replicates.
No relationship between chronotype and timing of breeding when variation in daily activity patterns across the breeding season is taken into account
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Data from: Variation in chronotype is associated with migratory timing in a songbird
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Examining The Effect of Chronotype Differences on Sleep Quality and Pregnancy Symptoms in Pregnant Women
ClinicalTrials.gov study NCT06413784. IPD Sharing: NO. Countries: 1. Publications: 1.
Chronotype, Chrononutrition and Glucose Tolerance Among Prediabetic Individuals
ClinicalTrials.gov study NCT05163964. IPD Sharing: NO. Countries: 1. Publications: 11.
Chronotype and Premature Ejaculation
ClinicalTrials.gov study NCT04841395. IPD Sharing: NO. Countries: 1. Publications: 3.
Investigation of the Effects of Chronotype Differences on Balance and Muscle Strength in Young Adults
ClinicalTrials.gov study NCT06949371. IPD Sharing: NO. Countries: 1. Publications: 1.
Effects of Cognitive Behavioural Therapy and Bright Light Therapy for Insomnia in Adolescents With Evening Chronotype
ClinicalTrials.gov study NCT04256915. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Chronotype of Patients With Diabetes and Effect on Glycaemic Control
ClinicalTrials.gov study NCT02973412. IPD Sharing: UNDECIDED. Countries: 1. Publications: 3.
Sleep Patterns and Chronotype in Children With and Without Type 1 Diabetes
ClinicalTrials.gov study NCT06318611. IPD Sharing: NO. Countries: 1. Publications: 1.
Evaluation of Chronotype and Central Sensitization in Patients With Fibromyalgia Syndrome
ClinicalTrials.gov study NCT06197087. IPD Sharing: NO. Countries: 1. Publications: 8.
Resistance Exercise and Sleep Quality by Chronotype
ClinicalTrials.gov study NCT07234812. IPD Sharing: NO. Countries: 1. Publications: 19.
Effects of Breakfast Glycaemic Index on Cognition in Earlier or Later Chronotypes.
ClinicalTrials.gov study NCT06916039. IPD Sharing: NO. Countries: 1. Publications: 23.
Behavioral Chronotype: Impact on Sleep and Metabolism
ClinicalTrials.gov study NCT03647306. IPD Sharing: NO. Countries: 1. Publications: 17.
Exercise, Chronotype, and Prediabetes
ClinicalTrials.gov study NCT07389005. IPD Sharing: NO. Countries: 1. Publications: 3.
Effects of Reactive Hypoglycaemia on Cognition in Earlier or Later Chronotypes
ClinicalTrials.gov study NCT06941740. IPD Sharing: NO. Countries: 1. Publications: 25.
Chronotype-adapted Diet and Weight Loss
ClinicalTrials.gov study NCT05941871. IPD Sharing: UNDECIDED. Countries: 1. Publications: 14.
Data from: Chronotype variation drives night-time sentinel-like behaviour in hunter–gatherers
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