Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Mean nose-pokes during the five 2 s bins of the 10 s trace interval for the middle-aged cohort (darker greys) and the younger-adult cohort (lighter greys) and timepoint 1 (in each case a relatively darker shade) versus timepoint 5 (in each case a relatively lighter shade). Error bars represent the standard error of the mean. Asterisk indicates a significant difference between the timepoints (the younger-adult cohort bin 1), *p < 0.05.
