Comparison of Two Non-invasive Neuromodulation Techniques as Synergistic Therapy to Cognitive Stimulation in Amnestic Mild Cognitive Impairment (aMCI)

Inclusion criteria: * Being vaccinated against the SARS-COV2 virus. * Speak Spanish fluently. * Level of schooling greater than or equal to 6 years. * Amnestic mild cognitive impairment established by clinical examination performed by the treating physician (MoCA score: 19-25 points for probable aMCI) (based on the National Institute on Aging and Alzheimer's Association (NIA/AA) criteria, 2011). * Adequate visual and auditory acuity to perform neuropsychological tests and cognitive rehabilitation. * If receiving psychotropic drugs, having started the drugs at least 12 weeks before the start of the study, remaining at stable doses, or having suspended the drugs for at least 4 weeks before the study. * Be in good health without non-psychiatric medical diseases (uncontrolled systemic arterial hypertension, diabetes mellitus or dyslipidemia, infections, thyroid disease, vitamin deficiency) interfering with the study. * Willingness to participate in a study scheduled for 8 weeks and that participants can go to the Instituto Nacional De Psiquiatría for treatments, as well as scheduled evaluations. * An informant to respond to some of the assessment questionnaires throughout the study and who would stay with the participant for at least 10 h/week. Exclusion Criteria: * Any neurological disease that raises suspicion of cognitive failure other than Alzheimer's disease, such as Parkinson's, multi-infarct dementia, Huntington's disease, hydrocephalus, brain tumor, progressive supranuclear palsy, seizure disorder, subdural hematoma, multiple sclerosis, history of trauma craniocerebral with loss of alertness. * Participants with a history of severe psychiatric disorders according to DSM-5 (bipolar disorder, schizophrenia, chronic depression) or with psychotic features, agitation, or behavioral problems in the last three months that could lead to difficulties in meeting the protocol. * History of psychoactive substance abuse and current alcohol consumption with a pattern of abuse or dependence in the last two years. * Participants with alterations in a conventional electroencephalogram (paroxysmal phenomena identified by a neurophysiologist). * Participants with pacemakers, intracranial metal objects, or history of brain surgery, aneurysm clips, artificial heart valves, ear implants, metal fragments, or foreign objects in the eyes, skin, or body. * Participation in the last 6 months in a clinical study that involved neuropsychological assessment.