Nowadays in our society, the proportion of aged people among the general population is growing in such a way that it is thought that in the near future the sector of the population over 65 will undergo a significant rise. This tendency will be particularly dramatic in the developed countries. This aging of the population will give rise to a series of special needs in the health, psychological and social fields. Furthermore there will be an increase in the incidence of dependence, especially in that arising from pathologies as dementia and Alzheimer disease. This will have widespread repercussions throughout family and society. In this respect we should bear in mind the great significance of an early detection of cognitive and language impairment. Early detection and intervention will optimize the aging process and allow affected people to be treated as soon as possible, thus improving their quality of life.