Diachronic changes in size and shape of human proximal tibia in Central Europe during the latest 1200 years

0471852 - ARÚ 2017 RIV DE eng J - Článek v odborném periodiku
Brzobohatá, Hana - Krajíček, V. - Horák, Z. - Sedlak, P. - Velemínská, J.
Diachronic changes in size and shape of human proximal tibia in Central Europe during the latest 1200 years.
Homo-Journal of Comparative Human Biology. Roč. 67, č. 6 (2016), s. 433-446. ISSN 0018-442X. E-ISSN 1618-1301
Grant ostatní: GA UK(CZ) 613012
Institucionální podpora: RVO:67985912
Klíčová slova: human tibia * geometric morphometrics * diachronic trend
Kód oboru RIV: AC - Archeologie, antropologie, etnologie
Impakt faktor: 0.655, rok: 2016

During the past twelve centuries, the stature of Central European inhabitants has increased significantly with corresponding changes in the size of lower limb bones. The aim of our study was to determine whether these changes have occurred strictly in relation to size or if the shape of skeletal structures has been altered simultaneously. Diachronic size and shape changes in the proximal part of tibia in a Central European population (Czech Republic) were studied using geometric morphometrics (principal components analysis, Hotelling’s test, linear discriminant analysis). The study sample consisted of 183 three-dimensional (3D) models of adult tibiae dating to the early Middle Ages (N = 65), early 20th century (N = 60), and from a modern Czech population (N = 57). A positive secular trend in size manifested only between the two modern Czech populations (the 20th century vs. the 21st century), a time range shorter than one century. By contrast, landmark-based shape analyses revealed significant differences in tibial morphology over the three periods covered in the study. In particular, progressive changes were observed in the position of tibial tuberosity (shifted medially), the inclination of the line connecting tuberosity with anterior edge of the tibial plateau (sloped down), the reshaping of the lower back condyle boundary (shifted posteriorly), and reshaping of the medial contour of the medial condyle (shifted anteriorly). Changes in the shape of the proximal tibial extremity across the chronologically distinct groups indicated the existence of discreet but convincing microevolutionary trends involving this anatomical structure.
Trvalý link: http://hdl.handle.net/11104/0269242