Article1978

A family study of two skeletal variants: Atlas bridging and clinoid bridging

89 citations0/0 files storedAmerican Journal of Physical Anthropology

No readable copy stored yet — this record is metadata only.

No open-access location is known for this record yet.

Literature note Cite in a project Citation map

Forensic Anthropology and Bioarchaeology Studies Morphological variations and asymmetry Dermatoglyphics and Human Traits

Abstract

The frequency of two non-metric skeletal traits, atlas bridging and clinoid bridging, were examined serially in a randomly chosen sample of 147 families who participated in the Burlington Growth Study. The sample is representative of an Ontario white Anglo-Saxon population. Partial and complete atlas briging occurred in 29.2% of the sample, partial and complete clinoid bridging in 15.2%. Atlas bridging appears at an average age of 10.7 years, clinoid bridging at seven years, demonstrating that these characters are not simply expressions of soft tissue sclerosis in old age. Both traits show no strong associations with bone robusticity although atlas bridging is slightly more frequent in males. Both traits are more frequent in relatives of affected individuals than in the sample as a whole. Correlations between parents and offspring and between sibs are highly significant for atlas bridging, less so far clinoid bridging. These traits should fit either a single gene or quasi-continuous, polygenic model of inheritance. Several tests for polygenic inheritance such as the correlation between first and second born sibs' trait condition, the relationship between trait expression in offspring and total trait incidence in affected parents, and the correlation between trait frequency and expressivity on an intergroup basis were all positive for atlas bridging. The evidence for polygenic inheritance of clinoid bridging is weaker but suggestive. The results obtained in this study for atlas bridging are comparable to data from one earlier family study. The evidence suggests that these two traits should prove useful as genetic markers in skeletal population studies although there is still need for careful control over trait observation and description. Future research should attempt to measure non-metric traits continuously when their underlying distributions are known to be graded.

Paper brief

Loading…

Cite this work

Citation unavailable for this work.

BibTeX RIS CSL-JSON

No public copy is stored for this record, so only the metadata is cited.

Citations in this library

Citation map →

Stored only when both papers are in the corpus — 89 citations exist upstream.

References

1970Applied factor analysis 1967Epigenetic variation in the human cranium.1974An examination of the meaning of cranial discrete traits for human skeletal biological studies 1977The effect of artificial cranial deformation on the incidence of wormian bones in the lambdoidal suture 1976Within and between race distances in population studies based on discrete traits of the human skull

Cited by

2001An Integrative Approach to Mortuary Analysis: Social and Symbolic Dimensions of Chumash Burial Practices 2020Ancestry estimation in forensic anthropology: A review 1996Concordance of cranial and dental morphological traits and evidence for endogamy in ancient Egypt 2006Maximum-Likelihood Variance Components Analysis of Heritabilities of Cranial Nonmetric Traits 2003Composition of the founding population of Iceland: Biological distance and morphological variation in early historic Atlantic Europe 2011Sahara: Barrier or corridor? Nonmetric cranial traits and biological affinities of North African late holocene populations 2013Sex and age related non-metric variation of the human sternum in a Northwest Indian postmortem sample: A pilot study

Explore the map →

Papers that cite the same references — the relational fallback while embeddings are still backfilling.

Imported from OpenAlex (CC0) — nothing here is generated.