Figure 1.
The conceptual model. ANS, autonomic nervous system; NS, nervous system; PNS, parasympathetic nervous system; SNS, sympathetic nervous system; SES, socioeconomic status.
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.