transient ischemic attack

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A temporary blockage of the blood supply to the brain caused by a blood clot and usually lasting ten minutes or less, during which dizziness, blurring of vision, numbness on one side of the body, and other symptoms of a stroke may occur.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun medicine A temporary cessation or reduction of blood supply to part of the brain, resulting in brief neurologic dysfunction that usually persists for less than 24 hours.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun brief episode in which the brain gets insufficient blood supply; symptoms depend on the site of the blockage