Adrenarche and the evolution of human life history
Abstract
Adrenarche, the prepubertal onset of adrenal production of dehydroepiandrosterone sulfate (DHEAS), is a distinctive aspect of the human life course. Yet its evolutionary origins remain unexplained. Production of DHEAS is associated with the development of the zona reticularis, a novel histological layer within the adrenal gland, derived from the fetal adrenal gland, and associated with primates more generally. Evidence that DHEAS is a neurosteroid, together with the fact that increases in DHEAS parallel patterns of cortical maturation from approximately age 6 years to the mid‐20s, suggests that DHEAS may play an important role in extended brain maturation among humans. DHEAS has demonstrated effects on mood in humans, and acts at neuron receptor sites. I suggest three ways in which DHEAS may play a role in human brain maturation: 1) increasing activity of the amgydala; 2) increasing activity of the hippocampus; and 3) promoting synaptogenesis within the cortex. I propose that associated changes in fearfulness and anxiety, and memory, could act to increase social interaction with nonfamiliar individuals and shape cognitive development. Comparison with the African apes suggests that the timing of adrenarche in chimpanzees may be similar to that in humans, though the full course of age‐related changes in DHEAS and their relationship to reproductive and brain maturation are not clear. The role of DHEAS as a physiological mechanism supporting increased brain development, extended life span, and decreased sexual dimorphism is most compatible with Kaplan et al.'s(2000)theory of the evolution of human life history and intergenerational transfers. Am. J. Hum. Biol. 18:569–589, 2006. © 2006 Wiley‐Liss, Inc.
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DHEAS may increase neural plasticity through its role as a synaptic modulator.
“DHEAS may also increase neural plasticity thanks to its role as a synaptic modulator”
From The Adaptive Calibration Model of stress responsivity (2011) · cites this paper as Campbell, 2006
Adrenal androgens can affect brain function and maturation more strongly than they affect bodily development.
“Adrenal androgens, however, can have stronger effects on brain functioning and maturation.”
From The Adaptive Calibration Model of stress responsivity (2011) · cites this paper as Campbell, 2006
DHEAS acting at sex-steroid receptors may reduce fear and anxiety in social interactions.
“the action of DHEAS at sex-steroid receptors may reduce fear and anxiety in social interactions”
From The Adaptive Calibration Model of stress responsivity (2011) · cites this paper as Campbell, 2006
DHEAS acting at sex-steroid receptors may improve memory by modulating neural activity in the amygdala and hippocampus.
“improve memory by modulating neural activity in the amygdala and the hippocampus”
From The Adaptive Calibration Model of stress responsivity (2011) · cites this paper as Campbell, 2006
Despite the fact that the human juvenile and adult periods are longer than that of the chimpanzee and that human infants are larger than chimpanzee infants at birth, hunter-gatherer women characteristically have higher fertility than chimpanzee females.
“Despite the fact that the human juvenile (including emerging adulthood) and adult periods are longer than that of the chimpanzee and that human infants are larger than chimpanzee infants at birth, hunter-gatherer women characteristically have higher fertility than chimpanzee females (69).”
From Emerging Adulthood, a Pre-adult Life-History Stage (2020) · cites this paper as [69]
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The Adaptive Calibration Model of stress responsivity
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- Authors
- Campbell, B.
- Affiliations
- Boston University (US)
- Corresponding author
- Campbell, Benjamin
- ORCID
- Campbell, Benjamin
- Venue
- American Journal of Human Biology
- Publisher
- Wiley
- Published
- 2006-08-17
- Volume
- 18
- Issue
- 5
- Pages
- 569-589
- ISSN
- 1042-0533 (ISSN-L)
- 1520-6300
- OpenAlex
- W2169287605
- Cited by
- 150
- References
- 173
- Citations by year
- 2026: 6 · 2025: 5 · 2024: 3 · 2023: 6 · 2022: 5 · 2021: 2 · 2020: 9 · 2019: 6 · 2018: 12 · 2017: 14 · 2016: 8 · 2015: 11 · 2014: 7 · 2013: 5 · 2012: 9
- FWCI
- 5.86
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- American Journal of Human Biology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Evolutionary Psychology and Human Behavior
- Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
- Social Sciences › Psychology › Social Psychology › Primate Behavior and Ecology
- Keywords
- adrenarche, dehydroepiandrosterone sulfate, zona reticularis, brain maturation, neurosteroids, amygdala, hippocampus, synaptogenesis, fear and anxiety, memory, social interaction, chimpanzees, sexual dimorphism, intergenerational transfers
- MeSH terms
- Animals, Brain, Biological Evolution, Humans, Longevity, Memory, Sex Characteristics, Hominidae, Dehydroepiandrosterone Sulfate, Adrenarche
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
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