The Progressive Era. During the period known as the Progressive Era (1890s to about 1920) the U.S. government became increasingly activist in both domestic and foreign policy.
One possible link between brain freeze and other headaches is local changes in brain blood flow. If further research confirms all these types of headaches are caused by blood flow changes, new drugs that block widening of the blood vessels - called vasodilation - could improve treatment for sufferers.
Your Email Address: Maddie from Earth Unplugged explains why you get brain freeze when you eat or drink something cold like ice cream. The science involved with brain freeze is actually fairly easy to understand even though the scientific name of sphenopalatine ganglioneuralgia isnât very easy to spell or pronounce.our Email Address: Maddie from Earth Unplugged explains why you get brain freeze when you eat or drink something cold like ice cream. The science involved with brain freeze is actually fairly easy to understand even though the scientific name of sphenopalatine ganglioneuralgia isnât very easy to spell or pronounce.