Individual differences in the phase and amplitude of the human circadian temperature rhythm: with an emphasis on morningness–eveningness
@article{Baehr2000IndividualDI, title={Individual differences in the phase and amplitude of the human circadian temperature rhythm: with an emphasis on morningness–eveningness}, author={Erin K. Baehr and William Revelle and Charmane I Eastman}, journal={Journal of Sleep Research}, year={2000}, volume={9} }
We studied the relationship between the phase and the amplitude of the circadian temperature rhythm using questionnaires that measure individual differences in personality variables, variables that relate to circadian rhythms, age and sex. The ambulatory core body temperature of 101 young men and 71 young women was recorded continuously over 6 days. The temperature minimum (Tmin) and amplitude (Tamp) were derived by fitting a complex cosine curve to each day’s data for each subject…
481 Citations
The validity of the temporal parameters of the daily rhythm of melatonin levels as an indicator of morningness
- PsychologyChronobiology international
- 2002
The temporal parameters of melatonin synthesis are valid indicators of the individual circadian phase and the determination of the melatonin profile might be a valuable element of the criteria when assigning a person to shiftwork.
Phase Relationships between Sleep-Wake Cycle and Underlying Circadian Rhythms in Morningness-Eveningness
- PsychologyJournal of biological rhythms
- 2004
The morningness-eveningness preference identified by the MEQ score refers to 2 distinct mechanisms, 1 associated with a difference in circadian period and phase of entrainment and the other associated with chronobiological aspects of sleep regulation.
Weak Associations of Morningness-Eveningness and Stability with Skin Temperature and Cortisol Levels
- PsychologyJournal of circadian rhythms
- 2019
The present findings demonstrate that the skin temperature is weakly associated with morningness-eveningness and the stability of the circadian phase.
Three dimensions of individual variation in phase angle between sleep timing and timing of nocturnal rise of the feeling of sleepiness
- Psychology
- 2015
It seems that both fundamental research and field studies of sleep-deprived individuals can benefit from the evaluation of circadian phase through self-assessment of nocturnal rise of alertness–sleepiness.
Constraint is associated with earlier circadian phase and morningness: Confirmation of relationships between personality and circadian phase using a constant routine protocol.
- PsychologyPersonality and individual differences
- 2017
Chronotype influences activity circadian rhythm and sleep: Differences in sleep quality between weekdays and weekend
- BiologyChronobiology international
- 2015
The findings suggest that E-types accumulate a sleep deficit during weekdays due to social and academic commitments and that they recover from this deficit during “free days” on the weekend.
The circadian typology: the role of physical activity and melatonin
- Biology, PsychologySport Sciences for Health
- 2017
The propensity toward morning or evening preferences in different life periods and the interactions between melatonin and physiological functions associated to physical activity are analyzed.
Sex Differences in Phase Angle of Entrainment and Melatonin Amplitude in Humans
- Psychology, BiologyJournal of biological rhythms
- 2010
Given that sleep propensity and structure vary with circadian phase and are impacted by circulating melatonin, these findings may have important impli cations for understanding sex differences in sleep timing and duration, diurnal preference, and the prevalence of sleep disorders such as insomnia.
The circadian and homeostatic modulation of sleep pressure during wakefulness differs between morning and evening chronotypes
- Biology, PsychologyJournal of sleep research
- 2003
The results suggest that both the circadian signal and the kinetics of sleep pressure buildup differ between the two chronotypes even under prior naturalistic conditions mimicking the usual working day.
Influence of chronotype and social zeitgebers on sleep/wake patterns.
- PsychologyBrazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas
- 2008
The results support the idea that social schedules have an impact on the expression of circadian rhythmicity but this impact depends on the individual chronotype.
References
SHOWING 1-10 OF 87 REFERENCES
A self-assessment questionnaire to determine morningness-eveningness in human circadian rhythms.
- PsychologyInternational journal of chronobiology
- 1976
Although the questionnaire appears to be valid, further evaluation using a wider subject population is required, as sleep habits are an important déterminant of peak time there are other contibutory factors, and these appear to be partly covered by the questionnaire.
Psychometric comparison of two circadian rhythm questionnaires and their relationship with personality
- Psychology
- 1992
Inter-individual differences in the human circadian system: A review
- PsychologyBiological Psychology
- 1985
Personality differences in the phase of circadian rhythms: a comparison of morningness and extraversion.
- PsychologyErgonomics
- 1988
Examining the trends over a complete 24 h cycle for a range of performance and psychophysiological measures in students with extreme scores for both extraversion and morningness concluded that reliable phase differences associated with morningness were confined to subjective ratings of alertness, oral temperature, and, in combination with extraversion, choice reaction time.
Individual differences in human circadian rhythms
- PsychologyBiological Psychology
- 1977
Gender differences in the circadian temperature rhythms of healthy elderly subjects: relationships to sleep quality.
- PsychologySleep
- 1989
The data support the notion that age- related changes in the circadian timing system are, in large part, gender-dependent and are consistent with the hypothesis that alterations in sleep timing and quality that typically accompany aging are closely tied to age-related changes in circadian physiology.
Relationship of endogenous circadian melatonin and temperature rhythms to self-reported preference for morning or evening activity in young and older people.
- PsychologyJournal of investigative medicine : the official publication of the American Federation for Clinical Research
- 1999
An association between circadian phase, the relationship between the sleep-wake cycle and circadianphase, and morningness-eveningness in young adults is demonstrated and age-related changes in phase angle cannot be attributed fully to an age- related shift toward morningness.
Morning-type and evening-type individuals differ in the phase position of their endogenous circadian oscillator
- BiologyNeuroscience Letters
- 1996