An 85-year-old California woman was behind the wheel of a Toyota four-door sedan that hit a six-year-old boy in Sparks Monday afternoon. Police say the woman was driving west on Disc Drive shortly before 5PM when she hit a bicycle ramp in the street. The ramp was thrown forward and hit the boy, who was riding a bicycle. Police say the driver then drove over the boy as he tried to stand up. He was unconscious after the incident and taken to the hospital for treatment of serious injuries. The Major Accident Investigation Team is investigating the crash due to the severity of the injuries. Police say the driver is believed to have a medical condition that contributed to the collision.