Figure 4: Age-dependent changes of delay tuning.
From: Auditory cortex of newborn bats is prewired for echolocation
(a) CD and echo threshold levels at CD for three age groups (0–7 days, 20–28 days, adult) for both species. Red symbols: youngest animals, days 0–2. (b) Comparison of CD threshold level (left) and DRA-tuning width (right) for the three age groups. CD threshold significantly decreases with increasing age (P<0.01; Wilcoxon ranked sum test; asterisks indicate significance compared with the next younger age group, circles indicate significance between the 0–7 days and adult group). Neurons are sorted into three CD groups (0–4.9, 5–9.9 ms, ≥10 ms, see inset). Number of neurons for each box plot is given below the plot. In PP, the tuning width of neurons tuned to 0–4.9 ms significantly decreases between the youngest and the intermediate and adult age group. Box plots delimit 50 and 75% with geometric (white line) and arithmetic (black line) mean.
