Fig. 4.

Reliable population responses to vocalizations. A–D: population responses to 4 representative pup calls. i: Spectrograms of the vocalizations with amplitude envelope in cyan. Y-axis ranges from 27.5 to 43 kHz. ii: Average PSTH of 57 UVF neurons in response to normal ultrasonic vocalizations (red; same as shown in Fig. 3C). Remaining neurons are shown in blue. iii: Average PSTH of 19 non-UVF neurons in response to pitch-shifted vocalizations (yellow; same as shown in Fig. 3D). Remaining neurons are shown in blue. iv: Response reliability index (RRI) of UVF neurons (in response to ultrasonic vocalizations; red) is significantly higher than RRI of non-UVF neurons (in response to pitch-shifted vocalizations; yellow).