Salivary flow rate before and after the U-K test. Data (ml/min) are mean ± SD (n = 16). Saliva was collected for 5 min by the spitting method. Base; basal state of volunteers 1 h before the U-K test; pre: immediately before the test; int: during the test interval; 0, 5, 10, 20, 30, 40, 50, 60 min: minutes after completion of the U-K test. U-K: Uchida-Kraepelin.