- Pain : Dolorous Scale . The evaluation is based on pre and post treatment variations. As a high proportion of patients have cognitive impairment, the behavioural pain scale "dolorous" has been chosen after staffs training for all patients, although "extra " auto evaluation is used when possible (EVS). Evaluation takes place after 5 sessions and after the end of the intervention as well as 2 and 4 weeks after the interventionProfessional carers' satisfaction is recorded.