Not long before he's hit with nauseating pain on one side of his head, Rennich experiences something called a visual aura _ a neurological disturbance that starts with a slowly expanding blind spot near the center of his left visual field.
12.
""'Pre-ictal " "'refers to the state immediately before the actual seizure, stroke, or headache, though it has recently come to light that some characteristics of this stage ( such as visual auras ) are actually the beginnings of the ictal state.
13.
Davis was able to play in the first quarter against Green Bay and was able to score a TD . But then he experienced the visual aura that he knew all too well was the precursor of a migraine, and terror overcame him on the sideline.
14.
Migraine usually follows some kind of anticipatory symptoms . 15 percent of migraine sufferers report a visual aura 20 to 40 minutes before the pain starts, a shimmering sparkling image or a small blind spot that spreads slowly to obscure half the field of vision of each eye.
