This time, he passed. Cognitive impairment is far more difficult because these people simply aren't capable of recognizing that there is a problem. In addition to often not realizing their declining abilities, those with diseases that impair brain function frequently do not appreciate the inherent risks of driving. Even if these people have a wreck, they may have no recollection of the event. The only thing they may truly remember is that they consider themselves to be good drivers.
Memory problems can cause other difficulties, as well.
Individuals with diseases such as Alzheimer's may get lost easily, even going around the block. A short trip may easily end up being a long journey which can end in disaster. Confused about their whereabouts, a person can have a catastrophic reaction similar to a panic attack. That can further impede overall decision-making abilities and competency behind the wheel. It is surprising to many people to learn that speech-language pathologists, commonly known as speech therapists, are the healthcare professionals who often help assess cognitive abilities following a neurological event caused by a stroke, injury, medication or disease.