Environmental factors are also thought to play an important role in the development of this condition. Our genes contain the code that is the blueprint for the structure and function of our bodies. Genes are found in chromosomes, which are packages of genes that are inherited from our parents. One is on chromosome 21, another is on chromosome 14, and the third is found on chromosome 1. However, for most AD patients the genetic involvement is less clear, but there is strong evidence that one predisposing gene is on chromosome 19.
Symptoms usually begin with impairment of memory, especially for recent events.
Other symptoms include misplacing objects and getting lost. With time, patients become increasingly confused and disoriented. They may have difficulty finding words in conversation. Personality and behavioral changes, such as agitation, depression, and delusions may occur. Judgment often becomes impaired.