Cited by 1,188Stress Responses and CortisolAdrenal Hormones and DisordersCircadian rhythm and melatonin

The cortisol awakening response (CAR): Facts and future directions

Fries, Eva, Dettenborn, Lucia, Kirschbaum, Clemens·2009·International Journal of Psychophysiology

Abstract

In humans, the secretion of cortisol from the adrenal glands follows a diurnal cycle with a profound increase after awakening. This increase after awakening, a phenomenon termed the cortisol awakening response (CAR), appears to be a distinct feature of the hypothalamus-pituitary-adrenal (HPA) axis, superimposing the circadian rhythmicity of cortisol secretion. Several studies point towards an important role of the hippocampus and, additionally, other brain structures (e. g. amygdala, prefrontal cortex, suprachiasmatic nucleus) in the regulation of the CAR. There is increasing knowledge that the CAR is influenced by a variety of factors such as gender, health status, and health behavior or stress perception. However, the exact function of the profound cortisol increase after awakening is still not clarified. We hypothesize that the anticipation of the upcoming day is of major relevance for the magnitude of the CAR. The present paper reviews the current knowledge on the neural regulation of the CAR and factors influencing this phenomenon and considerations are addressed concerning the exact function of the CAR.

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Crossref · 10.1016/j.ijpsycho.2008.03.014

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Authors
Fries, E., Dettenborn, L., & Kirschbaum, C.
Affiliations
Technische Universität Dresden (DE)
Corresponding author
Kirschbaum, Clemens
Venue
International Journal of Psychophysiology
Publisher
Elsevier BV
Published
2009-04
Volume
72
Issue
1
Pages
67-73
ISSN
0167-8760 (ISSN-L)
OpenAlex
W2067664488
Cited by
1,188
References
24
Citations by year
2026: 50 · 2025: 43 · 2024: 42 · 2023: 65 · 2022: 64 · 2021: 84 · 2020: 92 · 2019: 63 · 2018: 70 · 2017: 77 · 2016: 96 · 2015: 85 · 2014: 93 · 2013: 76 · 2012: 57
FWCI
19.74
Type
journal article
Language
en
Open access
closed
Locations
  • International Journal of Psychophysiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
Keywords
cortisol awakening response, diurnal cortisol rhythm, hypothalamic-pituitary-adrenal axis, circadian rhythm, hippocampus, amygdala, prefrontal cortex, suprachiasmatic nucleus, perceived stress, anticipatory arousal, gender differences, health behavior
MeSH terms
Animals, Anti-Inflammatory Agents, Humans, Hydrocortisone, Hypothalamo-Hypophyseal System, Pituitary-Adrenal System, Wakefulness

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