Medical, neurological, neuropsychological and neuroradiological depth in accordance with the criteria for inclusion and exclusion-specific population, that is to say:
* Informal Caregivers: Being a carer for someone with neurodegenerative cognitive disorders (NCD), living at home, without memory complaints, normal performances compared to the age and the educational level for all tests of the diagnostic battery.
* Patients with neurodegenerative cognitive disorders: presenting neurodegenerative cognitive disorders, have an identified informal caregiver.
You may not be if
A chronic neurological, psychiatric, endocrine, hepatic or infectious complaint
A history of major disease (an uncontrolled diabetes, a lung, heart, metabolic, hematologic, endocrine disease or a severe cancer);
A medication that may interfere with memory or metabolic measures
