Back to Self Assurance definition listing Choose a year from the dropdown to view that year's definition 2001 2001 2000 1999 Degenerative organic brain disease Date: July 2001 Definition: Changed to separate definitions for Alzheimer's disease, Creutzfeldt-Jakob disease and Dementia. Definition update history: Degenerative organic brain disease July 2001 Degenerative organic brain disease March 2001 Degenerative organic brain disease June 2000 Degenerative organic brain disease January 2000 Degenerative organic brain disease July 1999 Share this by email Back to Self Assurance definition listing