Abstract
The motor ability of fingers and toes of the pure Ainu, the mixed Ainu-Japanese, and the local Japanese was measured. 1. Fingers The following tests were employed : a) The ability to open the gap between fingers III and IV while III is parallel with II and IV with V. b) The ability to place fingers III, IV, and V in order on II. c) The ability to place fingers IV, III, and II in order on V. The results, tested by factor analysis, were as follows : Male-Differences due to factors of race and age are remarkable Female-Differences due to the factor of race are not great, but those due to the factor of age are evident Male and Female-In case of the pure Ainu there are hardly any significant differences between the sexes ; however, differences based upon age are not inconsiderable. The difference between the right and left hands is very slight (α>0.05), but the left hand tends to show a slightly higher performance than the right. 2. Toes The ability to place toe I on toe II and to separate the toes differs significantly (α<0.01) between the pure Ainu and the mixed as well as between the pure Ainu and the Japanese.
