Looking back, Tammy Maida, 67, said things started to change in her late 50s. At first, she would lose track of her belongings: her keys multiple times a day, a ring, eyeglasses, her purse.
She would drive to the grocery store in her hometown of San Jose, California, and forget where she parked the car. At home, she couldn’t remember where she had put the groceries. Her husband, Paul, would sometimes find them in the garage.