Individual behavioural predictors of amphetamine-induced emission of 50 kHz vocalization in rats

Behavioural Brain Research
Kevin G Mulvihill, Stefan M Brudzynski

Abstract

Measurement of ultrasonic vocalizations (USVs) produced by adult rats represents a highly useful index of emotional arousal. The associations found between 50 kHz USV production and a variety of behavioural and pharmacological protocols increasingly suggests they serve as a marker of positive motivational states. This study used a powerful within-subjects design to investigate the relationships among individual differences in approach to a sweet-food reward, predisposition to emit 50 kHz USVs spontaneously, and 50 kHz USVs emission following acute systemic administration of amphetamine. Both approach motivation and predisposition to call were found to not correlate with each other but did predict 50 kHz USV response to acute amphetamine. These two behavioural phenotypes appear to represent dissociable predictors of acute amphetamine-induced emission of 50 kHz USVs in a non-sensitization paradigm. In contrast to that, a measure of sucrose preference was not found to predict 50 kHz USV emission following amphetamine. Acute amphetamine was also found to increase average sound frequency of emitted USVs and selectively increase the proportion of Trill subtype 50 kHz USVs. Together, these data demonstrate that acute amphetamine-induc...Continue Reading

Citations

Jan 21, 2020·Frontiers in Behavioral Neuroscience·Michal BialyTymoteusz Zera
Nov 18, 2018·Pharmacology, Biochemistry, and Behavior·Kevin G Mulvihill, Stefan M Brudzynski
Jul 9, 2021·Frontiers in Behavioral Neuroscience·Mohammad SeidisaroueiTobias Kalenscher

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