抄録
Age related alterations in characteristics and morphology were studied in 144 healthy females (18-62 years old). In this research, questionnaires, macroscopic observation of external appearance, measurement of physiology, elasticity, blood flow, skin color, and analysis of skin surface microtopography from replica were conducted.
Questionnaires indicated many panelers to suffer from neck beauty, but to hardly seek neck treatment. Wrinkles and skin slackening due to reduction of elasticity were mostly observed, followed by suntan and pigmentation. Wrinkles and acrochordon increased after 25 years of age and were observed in 70-80% of the panelers after 25 years of age. Angioma senile was observed in 30-40% in almost all age groups and had no relation to aging. Pigmentation was hardly observed until 30s, and increased after the 40s. However, the frequency of pigmentation was less in neck than face or head. Significant reduction in elasticity was observed with aging, the degree in the neck being less than that of the face. Change in blood flow and skin color was not significant with aging. Morphological change in the skin surface with aging was analyzed from replica. Results in vertical and horizontal directions differed and change in the horizontal sulcus cutis was observed to a greater extent than in the vertical sulcus cutis. Change rate in the horizontal sulcus cutis compared to the vertical sulcus cutis increased with aging.
