To assess sex- and age-related characteristics in standardized facial movements, 40 healthy adults (20 men, 20 women; aged 20-50 years) performed seven standardized facial movements (maximum smile; free smile; "surprise" with closed mouth; "surprise" with open mouth; eye closure; right- and left-side eye closures). The three-dimensional coordinates of 21 soft tissue facial landmarks were recorded by a motion analyser, their movements computed, and asymmetry indices calculated. Within each movement, total facial mobility was independent from sex and age (analysis of variance, p>0.05). Asymmetry indices of the eyes and mouth were similar in both sexes (p>0.05). Age significantly influenced eye and mouth asymmetries of the right-side eye closure, and eye asymmetry of the surprise movement. On average, the asymmetry indices of the symmetric movements were always lower than 8%, and most did not deviate from the expected value of 0 (Student''s t). Larger asymmetries were found for the asymmetric eye closures (eyes, up to 50%, p<0.05; mouth, up to 30%, p<0.05 only in the 20-30-year-old subjects). In conclusion, sex and age had a limited influence on total facial motion and asymmetry in normal adult men and women.

The effect of age and sex on facial mimicry: a three-dimensional study in healthy adults / C. Sforza, A. Mapelli, D. Galante, S. Moriconi, T.M. Ibba, L. Ferraro, V.F. Ferrario. - In: INTERNATIONAL JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY. - ISSN 0901-5027. - 39:10(2010), pp. 990-999. [10.1016/j.ijom.2010.05.011]

The effect of age and sex on facial mimicry: a three-dimensional study in healthy adults

C. Sforza
Primo
;
A. Mapelli
Secondo
;
D. Galante;T.M. Ibba;V.F. Ferrario
Ultimo
2010

Abstract

To assess sex- and age-related characteristics in standardized facial movements, 40 healthy adults (20 men, 20 women; aged 20-50 years) performed seven standardized facial movements (maximum smile; free smile; "surprise" with closed mouth; "surprise" with open mouth; eye closure; right- and left-side eye closures). The three-dimensional coordinates of 21 soft tissue facial landmarks were recorded by a motion analyser, their movements computed, and asymmetry indices calculated. Within each movement, total facial mobility was independent from sex and age (analysis of variance, p>0.05). Asymmetry indices of the eyes and mouth were similar in both sexes (p>0.05). Age significantly influenced eye and mouth asymmetries of the right-side eye closure, and eye asymmetry of the surprise movement. On average, the asymmetry indices of the symmetric movements were always lower than 8%, and most did not deviate from the expected value of 0 (Student''s t). Larger asymmetries were found for the asymmetric eye closures (eyes, up to 50%, p<0.05; mouth, up to 30%, p<0.05 only in the 20-30-year-old subjects). In conclusion, sex and age had a limited influence on total facial motion and asymmetry in normal adult men and women.
3D; ageing; asymmetry; mimics; motion analysis
Settore BIO/16 - Anatomia Umana
Settore MED/29 - Chirurgia Maxillofacciale
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/146500
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