Neurofilament Light Chains and Cognitive Impairment in Chronic Psychiatric Disease

One hundred twenty participants will be included in this study * 30 participants suffering from psychiatric disorders (bipolar disorder or schizophrenia) without cognitive impairment * 30 participants suffering from psychiatric disorders (bipolar disorder or schizophrenia) with cognitive impairment * 30 participants with a biological diagnosis of Alzheimer's disease * 30 participants with frontotemporal dementia according to Rascosky's criteria All the participants will perform cognitive, behavioral, and psychiatric evaluation and will be have blood sample taken.