Olszyński Krzysztof H, Polowy Rafał, Małż Monika, Boguszewski Paweł M, Filipkowski Robert K
Behavior and Metabolism Research Laboratory, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 Pawinskiego St, 02-106 Warsaw, Poland.
Laboratory of Animal Models, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur St, 02-093 Warsaw, Poland.
iScience. 2020 Sep 19;23(10):101577. doi: 10.1016/j.isci.2020.101577. eCollection 2020 Oct 23.
Our rudimentary knowledge about rat intraspecific vocal system of information exchange is limited by experimental models of communication. Rats emit 50-kHz ultrasonic vocalizations in appetitive states and 22-kHz ones in aversive states. Both affective states influence heart rate. We propose a behavioral model employing exposure to pre-recorded playbacks in home-cage-like conditions. Fifty-kHz playbacks elicited the most vocalizations (>60 calls per minute, mostly of 50-kHz type), increased heart rate, and locomotor activity. In contrast, 22-kHz playback led to abrupt decrease in heart rate and locomotor activity. Observed effects were more pronounced in singly housed rats compared with the paired housed group; they were stronger when evoked by natural playback than by corresponding artificial tones. Finally, we also observed correlations between the number of vocalizations, heart rate levels, and locomotor activity. The correlations were especially strong in response to 50-kHz playback.
我们对大鼠种内信息交流发声系统的初步了解受到交流实验模型的限制。大鼠在积极状态下发出50千赫兹的超声波叫声，在消极状态下发出22千赫兹的叫声。这两种情感状态都会影响心率。我们提出了一种行为模型，该模型采用在类似家笼的条件下播放预先录制的声音。50千赫兹的声音回放引发了最多的叫声（每分钟超过60次叫声，大多为50千赫兹类型），增加了心率和运动活动。相比之下，22千赫兹的声音回放导致心率和运动活动急剧下降。与成对饲养的大鼠相比，单独饲养的大鼠观察到的效果更明显；自然声音回放引发的效果比相应的人工音调更强。最后，我们还观察到叫声数量、心率水平和运动活动之间的相关性。这种相关性在对50千赫兹声音回放的反应中尤为强烈。
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