Temperature rhythms in native Alaskan and Caucasian children.

The oral temperatures of native Eskimo and Caucasian school children between 10 and 13 years of age were measured at four times of day and once at night on four consecutive days during the Spring and Fall. There were significant differences across the daily measures indicating circadian entrainment. There were no differences between the native and Caucasian groups indicating that earlier reports of less well defined circadian rhythms in adult native Eskimos were not due to inherent rhythm limitations in native Eskimos.