Ashwini J Parsana

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Rat ultrasonic vocalizations (USVs) are ethologically-essential social signals. Under natural conditions, 22kHz USVs and 50kHz USVs are emitted in association with negative and positive emotional states, respectively. Our first experiment examined freezing behavior elicited in naïve Sprague-Dawley rats by a 22kHz USV, a 50kHz USV, and frequency-matched(More)
Rats emit ultrasonic vocalizations (USVs) at ∼22kHz and ∼50kHz, respectively, during negative and positive affective states. Among rats raised in a naturalistic social context, 22-kHz USVs serve as "alarm cries" that can elicit freezing behavior. By contrast, several studies show that naïve laboratory rats do not freeze in response to alarm cries. An(More)
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