N. Ipsilateral, temporal, orbital and or bilateral pain resulting from rapid cooling of the spheno-palantine ganglion (roof of mouth), often a result of ice-cream or slurpees, although any cold
substance can trigger such a response. The pain is a result of dialated blood vessels
in the brain brought on by spasms of
the nerve endings and typically peaks in about 20 seconds from the point of ingestion.