a nonsignificant trendP = 0.06
Comparisons with baseline (100%, one-sample t tests with Bonferroni correction for multiple comparisons) revealed no significant potentiation in the SCH 23390-treated group (t 4 = 1.08, P = 0.68) but a nonsignificant trend toward potentiation in the propranolol group 120 to 180 min after light stimulation (t 4 = 3.29, P = 0.06; Fig. 3 E , right panel).