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.
HVC volume (left), total neuron number (middle), and total HVC-RA projection neuron number (right) for all birds used in the 4 month survival study (Fig. 3), plotted as a function of age at the time of [3H]thymidine injections. Despite the dramatic age-related decline in adult-formed neuron number in these birds, HVC volume and the numbers of HVC neurons remained relatively stable with age.
