Figure 4. Maternal experience significantly influences tone pip-evoked ABR peak latencies.

A) Representative averaged traces from individual animals in response to tone pips at different frequencies (500 presentations per stimulus intensity). The black dot to the left of the y-axis denotes the threshold stimulus intensity. Peak I is labelled in each auditory brainstem response with the exception of 80 kHz as we were unable to identify a Peak I latency at this frequency. B) Distributions of latencies for all animals combined. Latencies measured 10 dB above each animal’s threshold. Bin width = 0.02 ms C) Effects of pup-care experience on peak I latencies. Dots show individual latencies for each animal with the middle horizontal bar representing the mean, and error bars denoting 95% confidence intervals. Asterisk indicates significance at the p<0.01 for the indicated post-hoc comparison.