Final answer:
A warning sign of stroke that lasts only a few minutes is called a Transient Ischemic Attack (TIA), often known as a mini-stroke where no permanent brain damage occurs.
Step-by-step explanation:
Warning signs of stroke that last only a few minutes are referred to as a Transient Ischemic Attack (TIA). A TIA shares similarities with a stroke, but unlike a stroke, the effects do not last as long. Specifically, a Transient Ischemic Attack is characterized by stroke symptoms that are resolved within a 24-hour period because of the restoration of proper blood flow. This is sometimes known as a mini-stroke. In the event of a TIA, although the neurological function may be temporarily lost due to a brief interruption in blood flow to the brain, there is no permanent damage to the brain cells.