Journal article
Morning-type and evening-type individuals differ in the phase position of their endogenous circadian oscillator
Neuroscience letters, Vol.218(3), pp.153-156
1996
Handle:
https://hdl.handle.net/2376/108856
PMID: 8945751
Abstract
In dealing with inter-individual phase differences in overt circadian rhythms, it is often difficult to distinguish the impact of the endogenous circadian oscillator from that of an individual's habitual lifestyle. In an attempt to resolve this uncertainty about the role of masking influences, two groups of subjects, morning-types and evening-types, were selected and monitored during entrained, habitual sleep-wake conditions and during 24 h of controlled wakefulness in a laboratory-based constant-routine procedure. Under both conditions significant differences were observed in the circadian phases of body temperature and subjective alertness. During constant routine mean between-group differences for these two variables were 2.12 and 4.28 h, respectively. Thus, evidence is provided for the endogenous nature of momingness-eveningness.
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Details
- Title
- Morning-type and evening-type individuals differ in the phase position of their endogenous circadian oscillator
- Creators
- Gerard A KerkhofHans P.A Van Dongen
- Publication Details
- Neuroscience letters, Vol.218(3), pp.153-156
- Academic Unit
- Medical Education and Clinical Science, Department of
- Publisher
- Elsevier Ireland Ltd
- Identifiers
- 99900546875201842
- Language
- English
- Resource Type
- Journal article