TY  - INPR
A1  - González Palomares, Eugenia
A1  - Boulanger Bertolus, Julie
A1  - Dupin, Maryne
A1  - Mouly, Anne-Marie
A1  - Hechavarria-Cueria, Julio C.
T1  - Amplitude modulation pattern of rat distress vocalisations during fear conditioning
T2  - bioRxiv
N2  - In humans, screams have strong amplitude modulations (AM) at 30 to 150 Hz. These AM correspond to the acoustic correlate of perceptual roughness. In bats, distress calls can carry AMs, which elicit heart rate increases in playback experiments. Whether amplitude modulation occurs in fearful vocalisations of other animal species beyond humans and bats remains unknown. Here we analysed the AM pattern of rats’ 22-kHz ultrasonic vocalisations emitted in a fear conditioning task. We found that the number of vocalisations decreases during the presentation of conditioned stimuli. We also observed that AMs do occur in rat 22-kHz vocalisations. AMs are stronger during the presentation of conditioned stimuli, and during escape behaviour compared to freezing. Our results suggest that the presence of AMs in vocalisations emitted could reflect the animal’s internal state of fear related to avoidance behaviour.
Y1  - 2023
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/73162
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-731629
IS  - 2023.01.18.524509
ER  -