How does feverfew prevent migraine headache?

I know that feverfew contains the compound parthenolide but how does parthenolide prevent migraines?

Answer:
In his book, Encyclopedia of Herbal Medicine, Dr. Thomas Bartram says that Feverfew is anti-spasmodic, tranqulizing, anti-inflammatory and a vasodilator. That sort of approaching a muscle relaxer, nerve pill, twinge pill all rolled into one.

Parthenolide is the component that controls the body's inflammatory response. It also help prevent excessive clumping of platelets.

Experience teaches us that fry lessens its medicinal properties, so fresh palm leaf, powder, tincture or essence prepared cold works best.

My wife had them TRUE bad after giving birth to my son so the Dr. told us going on for http://www.dontforgettotakeyourvitamins. these pills helped her seriously and me LOL. No but she got not as much of and fewer and immediately its been 8mo and no doomed to failure headaches so look into it they are adjectives natural

There's a fresh development surrounded by migraine therapy:
http://www.neurologyreviews.com/feb04/nr...