One of the early signs that foreshadowed my mother's decline was the deterioration of her driving skills, and this preceded almost all other noticeable symptoms

One of the early signs that foreshadowed my mother's decline was the deterioration of her driving skills, and this preceded almost all other noticeable symptoms. Driving is a complex skill that requires rapid, continuous sensory integration to perform well. It makes sense to me that it is something that would first show a deficit.