Kolyasnikova Anna Sergeevna

Introduction. Hyperostosis frontalis interna (HFI) is a pathological condition characterized by the growth of the inner surface of the frontal bone. Most researchers describe HFI as a symptom associated with hormonal dysfunctions, which prevails in the modern population. This paper provides an analysis of HFI frequency on the craniological material of four adaptive types.

Materials and methods. We have examined 2211 skulls (59 craniological collections from the Anuchin Research Institute and Museum of Anthropology, Peter the Great Museum of Anthropology and Ethnography, RAS and Federal Research Center of the Tyumen Scientific Center of the Siberian Branch of the Russian Academy of Sciences). We have analyzed the total frequency of HFI, used a comparative intergroup analysis, and evaluated the degree of HFI expression and the distribution of the trait.

Results and discussion. It was found that the frequency of HFI in groups of arctic, continental and temperate adaptive types ranged from 2.3% to 4.3%, which is significantly less than in the modern population (12-37%). In the group of the tropical adaptive type, HFI was not found. As a result of a comparative study of the severity of cases of frontal hyperostosis, type A was the most common, HFI type B was less common, and type C was recorded only for one individual of the Arctic adaptive type. The reasons for the relatively low prevalence of HFI in representatives of various adaptive types are discussed.

Conclusion. According to a low frequency of HFI in studied adaptive types comparing to data in modern population can be considered that adaptation to environment and life style is more important than climate and geographical features. © 2023. This work is licensed under a CC BY 4.0 license