Figure 1. The difference between tympanic membrane (core) and forehead skin-surface temperature decreased after induction of general anesthesia, but the decrease was not statistically significant. The difference between tympanic membrane and neck skin-surface temperature decreased significantly after induction of general anesthesia. Elapsed time-zero indicates induction of anesthesia. Asterisks (*) indicate values differing significantly from elapsed time-zero; results are presented as means +/- SD.