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. (1) A popular term for a brief but intense frontal cranial pain which follows the rapid consumption of cold foods or beverages; ice cream headache. (2) A popular term for the abrupt derailment of oneâs train of thought.rain freeze. (1) A popular term for a brief but intense frontal cranial pain which follows the rapid consumption of cold foods or beverages; ice cream headache. (2) A popular term for the abrupt derailment of oneâs train of thought.