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Potentiation and inhibition of ultrasonic vocalization of rat pups: Regulation by social cues
Author(s) -
Shair Harry N.,
Masmela Jenny R.,
Brunelli Susan A.,
Hofer Myron A.
Publication year - 1997
Publication title -
developmental psychobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 93
eISSN - 1098-2302
pISSN - 0012-1630
DOI - 10.1002/(sici)1098-2302(199704)30:3<195::aid-dev2>3.0.co;2-k
Subject(s) - psychology , developmental psychology , adult male , social isolation , audiology , endocrinology , biology , medicine , psychotherapist
Eight‐ and 11‐ to 12‐day‐old rat pups were tested in isolation and in the presence of an anesthetized adult under cold conditions. Pups of both ages reduced rates of ultrasonic vocalization (USV) when an adult was placed into the test cage, independent of whether the adult was their dam or an unrelated male. However, afer removal of the dam, pups greatly increased their rates of USV over their first isolation period and in comparison with control pups. USV rates remained low after removal of the male. The temperature challenges faced by the pups in the two experimental conditions were the same. These phenomena are better explained by a hypothesis that postulates USV rate as being multiply determined, including by social cues, rather than a theory that considers thermal challenge only. © 1997 John Wiley & Sons, Inc. Dev Psychobiol 30: 195–200, 1997