Actigraphy, Wearable EEG Band and Smartphone for Sleep Staging

FIRST STAGE (Healthy volunteers) Inclusion Criteria: * Age between 20 and 80 years old * Living in the city of São Paulo, Brazil * No physical or intellectual disability that prevent attending to a in-lab polysomnography or understanding its instructions. Exclusion Criteria: * Excessive daytime sleepiness (as measured by the Epworth Sleepiness Scale) * Poor sleep quality (as measured by the Pittsburgh Sleep Quality Index) * Insomnia symptoms at any level (as measured by the Insomnia Severity Index) * Symptoms of depression (as measured by the Beck Depression Inventory) * High risk to sleep apnea (as measured by the Stop-Bang questionnaire) * Presence of sleep-related symptoms (as measured by the UNIFESP (Federal University of São Paulo sleep questionnaire) * Self-reported abuse of alcohol, use of abuse drugs or use of medicine that might impact the normal sleep pattern (including hypnotics, benzodiazepines, antidepressants, corticosteroids, etc). * Self-reported chronic diseases * Diagnosis of any sleep disorders during the polysomnography SECONDS STAGE (volunteers with sleep disorders or complaints) Inclusion Criteria: * Age between 20 and 80 years old * Living in the city of São Paulo, Brazil * No physical or intellectual disability that prevent attending to a in-lab polysomnography or understanding its instructions. * At least one sleep disorder or sleep complaint. . Among these, at least 30% of the sample should have moderate to severe insomnia (as measured by the insomnia severity index), 30% should have high risk to sleep apnea (as measured by the STOP-BANG questionnaire) and 70% should have excessive sleepiness scale (as measured by the Epworth sleepiness scale). Exclusion criteria: * Absence of sleep disorders.