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Alfa Cognition is an observational and prospective study that analyses the relationship between the subjective perception of cognitive decline and the presence, evolution or risk of cognitive impairment clinically objective. It also analyses the relationship of these parameters with the brain changes associated with Alzheimer's disease ranging from the absence of deterioration to the manifestation of dementia.

200 people over 45 years of age are expected to participate in the study with mild cognitive impairment, mild dementia or no objectionable memory alterations, but who perceive a subjective cognitive decline. Participants come from the Alpha Study or databases of people interested in participating in research studies related to Alzheimer's disease.

Participation in the study involves the carrying out of neurological tests, of neuroimaging, cognitive tests and life habits, and an extraction of blood in order to rule out any condition that could cause cognitive impairment.

Alfa Cognition has three main objectives. First, study the association between the presence of perception of subjective decline in cognitively healthy people and the risk of progressive cognitive impairment. Second, analyze the evolution of the subjective perception of cognitive impairment of the participants and their associates throughout the different phases of Alzheimer's disease. Finally, investigate the relationship between subjective perception of cognitive decline and parameters such as cognitive performance, the presence of brain structural changes determined by magnetic resonance imaging and the presence of alterations in biomarkers of the disease.

Alfa Cognition
Study directed at people with subjective cognitive decline