Transient Ischemic Attack :
A transient ischemic attack (TIA) is an episode of focal neurological dysfunction reflecting inadequate blood supply to one portion of the brain. The attack usually lasts more than a few seconds but less than 20 minutes. In exceptional cases, the symptoms can persist up to 24 hours. Resolution of symptoms is complete.
At the time of physical examination, the driver is usually normal; however, a TIA episode is an important warning for a potentially severe stroke or other vascular event. The risk of recurrent events is highest during the first few weeks and months following the TIA, declining by year 1 to less than 5% per year. The risk of recurrent strokes may be lowered by medical or surgical interventions.
The medical examiner determines certification on a case-by-case basis considering the interval history, general health, neurological examination, and compliance with the treatment program.