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Sexual dimorphism of the face and changes during senescence
Mydlová, Miriama ; Velemínská, Jana (advisor) ; Blažek, Vladimír (referee)
The human face shape is constantly changing during human life, even after one`s development stop (Hennessy a Moss, 2001; Williams a Slice, 2010). This work applies geometric morphometry method on study of sexual dimorphism of human face through ageing. Sexual dimorphism can be defined as a systematic difference in form between individuals of different sex of the same kind (Samal et al., 2007). Morphological changes, related to the process of ageing of human face, were analysed on data obtained from 3D surface models of human faces using methods of geometric morphometry (Dense Correspondence Analysis, Principal Component Analysis, Shell-to-Shell Deviation) and multivariatel statistics (Scree Plot, Hotelling`s Tš-test, permutational test, MANOVA). The work results indicates that the form (size with shape) and shape of men and women faces significantly change through ageing. Individuals aged between 20-40 years differ in form of the face, however the oldest men aged between 61-82 years differ from women only in shape of the face. The biggest differences in sexual dimorphism are in the middle age category (41-60 years), where there are significant differences not only in form, but also considering shape alone. Key words: ageing, form and shape, geometric morphometry, human face, sexual dimorphism 7
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