Fig. 3
From: Stroking stimulation of the skin elicits 50-kHz ultrasonic vocalizations in young adult rats
Subtypes of 50-kHz USVs evoked by stroking of the ventral region. a Representative sonograms during stroking stimulation. b Absolute number of call subtypes during the 60-s stimulus period (left panel) and the 60-s post-stimulus period (right panel). The sonograms were obtained from four different rats. The data are based on 719 calls during the 60-s stimulus period and 385 calls during the 60-s post-stimulus period (n = 6). *p < 0.05, **p < 0.01, between groups, using paired t-test