This study investigated a new objective method of analyzing facial movements and examined the physiological range of asymmetry and differences between children and adults.
Facial expression data input to an Apple Computer using Quick Time was analyzed with digital image editing techniques.
Seven children (3∼7-year-old) and forty-six adults (20∼29-year-old) were analyzed utilizing this method. Four voluntary facial movements (wrinkling forehead, closing eye, grinning and wliistiing) were examined.
The differences in the ratio between the left and right sides were less than 6% in any area and with any movement. There were no significant differences between children and adults. Some areas obtained by subdivision showed larger changes with facial movements than other areas.
