Ancient Human Bone Microstructure in Medieval England: Comparisons between Two Socio-Economic Groups

Understanding the links between bone microstructure and human lifestyle is critical for clinical and anthropological research into skeletal

growth and adaptation. The present study is the first to report correspondence between socio-economic status and variation in bone microstructure

in ancient humans. Products of femoral cortical remodeling were assessed using histological methods in a large human medieval

sample (N:450) which represented two distinct socio-economic groups. Osteonal parameters were recorded in posterior midshaft femoral sections

from adult males (N:233) and females (N:217). Using univariate and multivariate statistics, intact, fragmentary, and osteon population densities, Haversian canal area and diameter, and osteon area were compared between the two groups, accounting for sex, age, and estimated femoral robusticity. The size of osteons and their Haversian canals, as well as osteon density, varied significantly between the socio-economic groups, although minor inconsistencies were observed in

females. Variation in microstructure was consistent with historical textual evidence that describes differences in mechanical loading and

nutrition between the two groups. Results demonstrate that aspects of ancient human lifestyle can be inferred from bone microstructure.