What disease is this?

here's the description:

The person could be say 35 and they’ve to body of an adult but their mind is like a child they think and act like a child what’s that? I saw it in an episode of Bones but I forget and we need to know for a project!

Thanks so much!

Decades ago we called it Mental Retardation, in today's politically correct culture, several different “diagnoses” are applied to the same behaviors. But, you may find links by googling Mental Retardation.

it is where the persons brain only develops to the age of about 9 or 10.

here are some websites about it:

http://www.ndss.org/

http://www.downsyndrome.com/

http://kidshealth.org/parent/medical/gen…

first of all it could be Autism or

men in general