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Metabolic hypothesis for human altriciality

Bibliographic Data

ID23328892
AuthorsHolly M Dunsworth (0000-0002-6685-213X, University of Rhode Island), A Warrener (0000-0002-7916-3456, Harvard University), Anna G Warrener (Harvard University), Terrence W Deacon (0000-0002-8672-5461, University of California, Berkeley), Terrence Deacon (Anthropology Department, University of California, Berkeley, CA 94720; and), Peter M Elias (0000-0002-0069-9064, Harvard University), Peter T Ellison (Harvard University), H Pontzer (0000-0003-2397-6543, Hunter College)
Year2012
Volume109
Issue38
Pages15212-15216
Publication date2012-09-18
Peer ReviewedYes
Open AccessYes
TypeARTICLE
VenueProceedings of the National Academy of Sciences (JOURNAL)
Journal identifiersISSN: 0027-8424 • E-ISSN: 1091-6490
PublisherNational Academy of Sciences (PUBLISHER • US)
DOI10.1073/pnas.1205282109
PMID22932870
PMCIDPMC3458333
OpenAlexW2146326139
LanguageEN
Citations received86
References cited39

The classic anthropological hypothesis known as the “obstetrical dilemma” is a well-known explanation for human altriciality, a condition that has significant implications for human social and behavioral evolution. The hypothesis holds that antagonistic selection for a large neonatal brain and a narrow, bipedal-adapted birth canal poses a problem for childbirth; the hominin “solution” is to truncate gestation, resulting in an altricial neonate. This explanation for human altriciality based on pelvic constraints persists despite data linking human life history to that of other species. Here, we present evidence that challenges the importance of pelvic morphology and mechanics in the evolution of human gestation and altriciality. Instead, our analyses suggest that limits to maternal metabolism are the primary constraints on human gestation length and fetal growth. Although pelvic remodeling and encephalization during hominin evolution contributed to the present parturitional difficulty, there is little evidence that pelvic constraints have altered the timing of birth.

Altricial · Biology · Brain size · Encephalization · Evolution of mammals · Evolutionary biology · Gestation · Human evolution · Human species · Pregnancy · Zoology · Birth, Development, and Health · Medicine · Neuroendocrine regulation and behavior · Urological Disorders and Treatments

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Unique citing works86
Citations per year6,62
Citation span2013 - 2026 (14)
Citation velocitycurrent
Highly citedNo
Citation typesNeutral: 81

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