text: if a person has 5% brain damage? from an accident that put them in a coma, would they remember things when they wake up or no? it depends on what area of the brain was damaged. ask them what part of the brain because each part hold it own function, for instance if he remember the past, he may not be able to remeber anything from now on...or the future, but his past i wiped away clean....just ask the doctor which section of his brain was damaged.