Ultrasonic communication in rats: effects of morphine and naloxone on vocal and behavioral responses to playback of 50-kHz vocalizations.

@article{Whr2009UltrasonicCI,
  title={Ultrasonic communication in rats: effects of morphine and naloxone on vocal and behavioral responses to playback of 50-kHz vocalizations.},
  author={Markus W{\"o}hr and Rainer K W Schwarting},
  journal={Pharmacology, biochemistry, and behavior},
  year={2009},
  volume={94 2},
  pages={285-95}
}
Rats emit ultrasonic vocalizations and it was hypothesized that these vocalizations have an important role in intra-specific communication. Recently, we demonstrated that playback of 50-kHz ultrasonic vocalizations can induce social approach, indicating that 50-kHz calls can serve to (re)establish or to maintain social contact. It is known that endogenous opioids are implicated in the regulation of social behavior, particularly in rough and tumble play. Here, we tested whether administration of… CONTINUE READING