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.
Schematic representation of the retino-hypothalamo-parasympathetic (SSN) and sympathetic (IML) pathways proposed to explain a host of light-induced autonomic responses during migraine attacks, and to a lesser extent, between attacks. SCG: superior cervical ganglion; IML: intermediolateral nucleus.
