Figure 2.

First latencies to either lick or guard during exposure to 1.5°C (top) and 44.5°C (bottom). A decline in response latency from 11 months to 27 months was observed for cold. This was followed by a dramatic increase in response latency (i.e. decreased sensitivity) at 35 months. Little change in response latency was observed across different age groups for 44.5°C. (Published with permission from Oxford University Press).