The secondary objectives of this study are to study the following elements in relationship to the implementation of a "Snoezelen-type" multi-sensory care strategy for patients with Alzheimer's-type neurodegenerative disease:
A. to evaluate the effects on NPI-Q scores at 1 month, 6 months and 12 months .
B. evaluate the effects on quality of life (questionnaire QOL-AD) at 0 and 12 months.
C. assess changes in the "aggressive behavior" subsection of the Cohen-Mansfield Agitation Inventory (CMAI) questionnaire over 0, 1, 3, 6 and 12 months.
D. assess changes in drug consumption (anxiolytics, antidepressants, hypnotics, neuroleptics)over the study period
