COMPLEX Vocal responses in both the audible and ultrasonic frequency r
anges were elicited by a single 2 ms electrical pulse applied to the t
ail. The first two cries exhibited consistent latencies and durations,
were intensity-dependent and were triggered by peripheral fibres with
conduction velocities of 7.3 +/- 0.8 and 0.7 +/- 0.1 ms-1, respective
ly. These behavioural responses are reminiscent of first and second pa
in triggered by Adelta- and C-peripheral fibres in humans. They were f
ollowed by irregular audible cries with a fundamental frequency of 1.5
kHz and '22 kHz ultrasonic calls'.