Auditory Stimulation During Sleep to Enhance Long-Term Memory in Amnestic MCI

Inclusion Criteria: * Age range \> 50 years and ≤ 75 years * Native Spanish speaker * Normal or corrected-to-normal color vision * Diagnosis of Alzheimer's disease with an amnestic phenotype at the mild cognitive impairment stage, confirmed according to the current clinical criteria of NIA-AA (2024) and IWG (2024), as well as the clinical protocols of the treating hospital * Sufficient hearing without the use of a hearing aid (participant with a hearing threshold of 50 dB or higher in the calibration night hearing test will be excluded) Exclusion Criteria: * Patients with severe and/or complex chronic systemic diseases: Advanced heart disease, Advanced chronic kidney disease, for example, stage 4 or 5, Severe lung disease, such as GOLD stage III-IV COPD, Metastatic or end-stage cancer, Severe hematologic disorders, Active or chronic uncontrolled infectious diseases (e.g., untreated HIV) * Evidence of strategic infarcts or other findings on neuroimaging that could be the cause of secondary cognitive impairment * Abuse of alcohol or other psychotropic substances * Diagnosed for depression or any severe psychiatric disorder in the 5 years prior to the evaluation * Changes in treatment with benzodiazepines or antidepressants in the 6 months prior to the initial evaluation * Treatment with neuroleptics * Epilepsy with active treatment (within the last 5 years) or any comorbidity with a neurological disease that may cause cognitive impairment or brain damage * Illiteracy * Moder…