e USV production of mice and vocalization of songbirds
Infant rodents emit ultrasonic vocalizations (USVs), whistle-like sounds with frequencies between 40 kHz and 100 kHz, when isolated from the mother and littermates (15). These signals play an important communicative role in mother–offspring interactions because they elicit prompt responses from the dam concerning caregiving behaviors
. However, it is not clear whether mouse USVs and human speech share a common molecular mechanism regulated by Foxp2.
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