Fig. 4.

Vocalization and behavior in mice with a disruption of the Foxp2 locus. (a) Number of ultrasonic vocalizations in 6 day old mice after separation from the dam. (b) Sample vocalization pattern showing both clicks (the two vertical traces covering both the sonic and ultrasonic region of the trace) and whistles (the four more vertical traces in the ultrasonic region of the trace). (c and d) Number of ultrasonic vocalizations (whistles) (c) and sonic/ultrasonic vocalizations (clicks) (d) in 10-day-old mice, after separation from the dam. (e) Shock sensitivity of adult mice. (f) Morris water maze performance of adult mice. *, P < 0.05; **, P < 0.005; ***, P < 0.0005.