Bony bridging of the mylohyoid groove of the human mandible

Citation
K. Jidoi et al., Bony bridging of the mylohyoid groove of the human mandible, ANTHROP SCI, 108(4), 2000, pp. 345-370
Citations number
81
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Sociology & Antropology
Journal title
ANTHROPOLOGICAL SCIENCE
ISSN journal
0918-7960 → ACNP
Volume
108
Issue
4
Year of publication
2000
Pages
345 - 370
Database
ISI
SICI code
0918-7960(200010)108:4<345:BBOTMG>2.0.ZU;2-#
Abstract
Bony bridging of the mylohyoid groove of the mandible (mylohyoid bridging) is one of the minor cranial variants and its frequencies in human groups ha ve been used for population studies. Its value as a genetic marker, however , has not yet been established. Formalin-fixed human lower jaws of 16 indiv iduals and human mandibles of 2,158 individuals were morphologically and st atistically examined. The findings indicate that the two basic types of myl ohyoid bridging, lingular type and bridge type, can be treated as one and t he same trait. Bilaterality in the expression and the occurrence independen t of age and sex are consistent with the assumption that genetic background is relevant to its formation. Moreover, relationships of human groups base d on the frequency of mylohyoid bridging are compatible with those based on dental morphology and human genetic analysis. Although the mylohyoid bridg ing occurs with high frequency in Neanderthals, it can also be observed in European Upper Palaeolithic humans with distinctly higher frequency than in subsequent populations. This finding appears to be important in arguments regarding the population history in Europe, if genetic background is releva nt to the expression of mylohyoid bridging as assumed from the present stud y.