Diseases that affect the central nervous system (CNS) encompass a wide range of conditions, including neurodegenerative disorders like Alzheimer's disease, Parkinson's disease, and multiple sclerosis, as well as psychiatric disorders like depression, schizophrenia, and bipolar disorder. These diseases can have profound impacts on cognitive function, motor skills, mood, and overall quality of life. Research into CNS diseases aims to uncover their underlying causes, develop better diagnostic tools, and discover novel treatment options.