Developmental differences in broad versus selective approach responses to ultrasonic vocalizations in rats: involvement of amygdala and nucleus accumbens activity
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Rats emit ultrasonic vocalizations (USVs) that function as affective and social acoustic cues. In adults, 50-kHz USVs are associated with appetitive states, whereas 22-kHz USVs are associated with aversive or defensive contexts. However, developmental changes ... ...
