Self-report of circadian type reflects the phase of the melatonin rhythm
| Autor: | Charles Graham, Michael Gibertini, Mary R. Cook |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Adult
Male Self-Assessment endocrine system Evening Adolescent Melatonin rhythm Physiology Developmental psychology Melatonin medicine Humans Circadian rhythm Self report Morning Analysis of Variance General Neuroscience Reproducibility of Results Pineal hormone Circadian Rhythm Neuropsychology and Physiological Psychology Mood Female Psychology hormones hormone substitutes and hormone antagonists medicine.drug |
| Zdroj: | Biological Psychology. 50:19-33 |
| ISSN: | 0301-0511 |
| DOI: | 10.1016/s0301-0511(98)00049-0 |
| Popis: | This study examined the relationship between circadian rhythm characteristics of the pineal hormone melatonin and individual differences in circadian type and mood. 95 healthy young men and 22 women were assessed each hour (00:00-07:00 h) for blood levels of melatonin throughout one night in the laboratory. Each subject was assessed for circadian type (morning, afternoon, or evening type) and morning mood (PANAS). Circadian type was strongly related to the melatonin acrophase but not to amplitude or time of year of assessment. Also, morning types evidenced a more rapid decline in melatonin levels after the peak than did evening types. Evening types were younger than were morning types. Female morning types reported more positive affect upon waking than did female afternoon or evening types. Males showed no such discrimination. Age was related to both melatonin acrophase and circadian type but did not explain the relationship between them. The results replicate and extend findings on circadian type and psychological and physiological variables. |
| Databáze: | OpenAIRE |
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