“…It is defined as a neurodegenerative disease which is characterized by a progressive loss of intellectual abilities (memory, reasoning, judgement, perception and orientation), increased propensity to emotional disabilities (unexplained bouts of depression, anxiety, agitation or uncharacteristic indifference and apathy) and gradual decline of personality (McKhann, Drachman, Folstein, Katzman, Price and Stadlan, 1984;Jones and Richardson, 1990). It is defined as a neurodegenerative disease which is characterized by a progressive loss of intellectual abilities (memory, reasoning, judgement, perception and orientation), increased propensity to emotional disabilities (unexplained bouts of depression, anxiety, agitation or uncharacteristic indifference and apathy) and gradual decline of personality (McKhann, Drachman, Folstein, Katzman, Price and Stadlan, 1984;Jones and Richardson, 1990).…”