背景:大多数关于皮肤老化的常规研究都集中在静态条件上。然而,在日常生活中,由于对话的表情和面部表情的变化,我们遇到的面部皮肤不断运动,导致皮肤改变其位置和形状,导致动态状态。因此,据推测,在静态条件下不明显的老化特征可能存在于皮肤的动态状态中。因此,这项研究调查了与面部表情改变相关的动态皮肤特征的年龄相关变化。
方法:运动捕捉系统测量了86名年龄在20至69岁之间的日本女性面颊皮肤响应面部表情的动态特征(与表情相关的皮肤运动的延迟和伸展性)。
结果:研究结果表明,随着年龄的增长,脸颊皮肤对面部表情的反应延迟增加(r=0.24,p<0.05),下脸颊区域的伸展性降低(r=0.60,p<0.01)。随着年龄的增长,同一年龄组的延迟和伸展性也增加。
结论:这项研究的结果表明,皮肤老化包含两种静态特征,如斑点,皱纹,下垂,传统上在衰老研究中研究,和响应面部表情变化而出现的皮肤的动态老化特征。这些动态老化特性可以为开发皮肤老化分析的新方法铺平道路,并可能改善我们对日常生活中视觉上可感知但仍未探索的老化印象的理解和治疗。
BACKGROUND: The majority of conventional studies on skin aging have focused on static conditions. However, in daily life, the facial skin we encounter is constantly in motion due to conversational expressions and changes in facial expressions, causing the skin to alter its position and shape, resulting in a dynamic state. Consequently, it is hypothesized that characteristics of aging not apparent in static conditions may be present in the dynamic state of the skin. Therefore, this study investigates age-related changes in dynamic skin characteristics associated with facial expression alterations.
METHODS: A motion capture system measured the dynamic characteristics (delay and stretchiness of skin movement associated with expression) of the
cheek skin in response to facial expressions among 86 Japanese women aged between 20 and 69 years.
RESULTS: The findings revealed an increase in the delay of
cheek skin response to facial expressions (r = 0.24, p < 0.05) and a decrease in the stretchiness of the lower
cheek area with age (r = 0.60, p < 0.01). An increasing variance in delay and stretchiness within the same age group was also observed with aging.
CONCLUSIONS: The findings of this study revealed that skin aging encompasses both static characteristics, such as spots, wrinkles, and sagging, traditionally studied in aging research, and dynamic aging characteristics of the skin that emerge in response to facial expression changes. These dynamic aging characteristics could pave the way for the development of new methodologies in skin aging analysis and potentially improve our understanding and treatment of aging impressions that are visually perceptible in daily life but remain unexplored.