accurate – adj. free from mistakes or errors

regular – adv. happening at times that are equally separated

scan(s) – n. the act or process of using a special machine to see the inside of something such as a part of the body

spinal – adj. of, relating to, or affecting the line of connected bones down the middle of the back

diagnose(d) – v. to recognize a disease or illness in someone

subjective – adj. based on feelings or opinions rather than facts

plaque – n. a change in brain tissue that occurs in Alzheimer's disease

habit(s) – n. a usual way of behaving

mutation(s) – n. a change in the genes of a plant or animal that causes physical characteristics that are different from what is normal

factor(s) – n. something that helps produce or influence a result