Fig 3.
Assessment of Acoustic startle stimuli-elicited ultrasonic vocalization in HR and LR. After a 5 min habituation period subjects were exposed to 24 discrete auditory pulses (105 dB, 20 msec) with the inter-trial interval of 30-45 sec. Vocalization latency (msec; A) and duration (msec; B) were measured in subjects vocalizing at least 60 ms. Values are means ± SEM (n=12/group). *Indicates significantly different from LR, Student’s t-test, P<0.05.