Eardream Data Collection in Colombia Supported by ADDF

Participants fulfilling all of the following inclusion criteria are eligible for the study: Informed Consent as documented by signature mutation and non-mutation carriers of ADAD populations Patients diagnosed with MCI and AD Diseases or lesions of the nervous system (acute or residual included neurological and psychiatric diseases, except for MCI and AD in the patient population) Clinically significant concomitant disease states (e.g., renal failure, hepatic dysfunction, cardiovascular disease, etc.) Sleep disorders, known or suspected (e.g. Insomnia, sleep apnoea, restless leg syndrome, narcolepsy, etc.) mini mental state examination (MMSE) score \> 24) Participants are not eligible if they fulfill the following exclusion criteria: Participation in another study with investigational drug/therapy/interventions within the 30 days preceding and during the present study (start date adapted accordingly) Suspected drug- or medication abuse, or on-label sleep medication use during the time of the study Infection/disease of the auditory canal or ear drum that could worsen with EAR-DREAM application, or allergies to in-Ear electrode materials (e.g., silver) Pregnancy (not safety related, but relevant for data interpretation procedures given that pregnancy can result in sleep patterns that are different from the baseline measurements we intend to characterize) Additional non-medical exclusion criteria may be defined for certain cognitive tasks (e.g. no glasses during experiments involving pupillometry).