Figure 1From: Melatonin facilitates extinction, but not acquisition or expression, of conditional cued fear in ratsMelatonin does not affect cued fear acquisition. (A) Schematic of the behavioral procedure used. Behavior procedure involved three training phases: habituation, fear conditioning and test. Rats were administrated melatonin 30 min before conditioning phase. (B) Percent freezing during the five cues was shown for the melatonin group (n = 10) and the vehicle group (n = 10) during conditioning phase. (C) Percent freezing to the five cues during test phase. Mel = melatonin group, Veh = vehicle group. All data are represented as mean ± SEM.Back to article page