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.
computed for all ROIs.
A: trends of 
for all ROIs, superimposed according to a color gradient from blue (growth cone) to red (soma). B: two-dimensional map of 
. The horizontal and vertical axes are, respectively, time (
) and space (
) coordinates, while values of 
are coded by colors, from blue (low) to red (high).
