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@article{1778519,
author = {Jandová, Marie and Urbanová, Petra},
article_number = {4},
doi = {http://dx.doi.org/10.1080/03014460.2021.1912824},
keywords = {Facial variability; fluctuating asymmetry; developmental instability; facial modularity; facial integrity},
language = {eng},
issn = {0301-4460},
journal = {Annals of Human Biology},
title = {Studying factors influencing facial developmental instability},
url = {https://www.tandfonline.com/doi/full/10.1080/03014460.2021.1912824},
volume = {48},
year = {2021}
}
TY - JOUR
ID - 1778519
AU - Jandová, Marie - Urbanová, Petra
PY - 2021
TI - Studying factors influencing facial developmental instability
JF - Annals of Human Biology
VL - 48
IS - 4
SP - 280-293
EP - 280-293
PB - Taylor & Francis Group
SN - 03014460
KW - Facial variability
KW - fluctuating asymmetry
KW - developmental instability
KW - facial modularity
KW - facial integrity
UR - https://www.tandfonline.com/doi/full/10.1080/03014460.2021.1912824
N2 - Background: Developmental instability is a component of non-genetic variation that results from random variation in developmental processes. It is considered a sensitive indicator of the physiological state of individuals. It is reflected in various ways, but in this study we focussed on its reflection in fluctuating asymmetry (FA) and morphological integration. Aim: To assess how, if at all, variations of facial morphology mirror developmental instability across childhood with respect to sex, growth rate and socioeconomic/environmental factors. Subjects and methods: A set of 210 three-dimensional facial models (of children aged between 6.3 and 14.3 years) originating from the FIDENTIS 3D Face Database was subjected to landmark-based methods of geometric morphometrics to quantify the degree of facial asymmetry and facial morphological integration. In addition, the association with age, sex, and socioeconomic factors was assessed. Results: Our results showed a nonlinear increase of FA with age up to the age of 14 years. The pattern of sex-related variants in facial FA differed in relation to age, as girls exhibited higher values of FA than boys up to the age of 9 years. We found that a signal of modularity based on functional demands and organisation of the face is of particular importance. Here, girls exhibited higher morphological covariation among modules. During more rapid adolescence-related growth, however, covariation among modules at the asymmetrical level decreased in both sexes. Conclusion: We can conclude that facial morphology was shown to be strongly integrated, particularly until adolescence. This covariation can facilitate an increase of FA. In addition, the results of this study indicate there is a weak association between socioeconomic stress and facial asymmetries. In contrast, sex and growth rate are reflected in developmental instability.
ER -
JANDOVÁ, Marie and Petra URBANOVÁ. Studying factors influencing facial developmental instability. \textit{Annals of Human Biology}. Taylor \&{} Francis Group, 2021, vol.~48, No~4, p.~280-293. ISSN~0301-4460. Available from: https://dx.doi.org/10.1080/03014460.2021.1912824.
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