Part 1 of Essay
affects nerve cells or the brain and leads to memory impairment and loss of mental faculties. is characterized by memory lapses, confusion, emotional instability, and progressive loss of mental power. A person can have memory loss, a personality change, and become listless or confused once they have AD (). These ar ....

Part 2 of Essay
.... that it is the result of some disease process. In fact the symptoms of were dismissed as normal consequences of human aging. After that, in the 1980's, AD came to be recognized as the most common cause of intellectual deterioration in the elderly and the middle-aged. Now it is also recognized as the major single cause of senility, or senile dementia. Hardly a month goes by without the discovery of a new gene, protein, or chemical process that contributes to this devastating illness. AD, being the most ....