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.
Brain freeze is where the palate of the mouth (the roof of the mouth) gets too cold and 'freezes' causing the nerves to send out pain signals. To cure it you simply place your â¦ tongue on the roof of your mouth to warm it up again. 3 people found this useful. Gangrel13. 400 Contributions.