Social Cognition in Ageing and in Frontotemporal Lobar Degeneration

Inclusion Criteria: * All the participants * Age between 40 and 80 years * Minimum of 7 years of education * French native speaker * Healthy subjects * Non pathological Dementia rating scale score * Patients * Clinical diagnosis of frontotemporal lobar degeneration Exclusion Criteria: * Chronic neurological disease * Encephalitis * Endocrinal disease * Hepatic disease * Case history of head injury with loss of consciousness of more than one hour * Case history of stroke * Case history of cancer during the five last years except squamous cell carcinomas * Alcoholism or drug addiction * Major psychiatric disorders according the Diagnostic and Statistical Manual of Mental Disorders