Neurological diseases are the diseases of the nervous system, which are caused due to electrical, structural and biochemical abnormalities in the brain, spinal cord or other nerves. Neurodegenerative and cerebrovascular diseases are major types of neurological diseases, which are related with high morbidity and mortality. The progressive loss of structure or function of neurons is the primary cause of a neurodegenerative disease and this process is known as neurodegeneration. Cerebrovascular diseases are a range of medical conditions that affect the blood vessels of the brain and cerebral circulation. The diagnosis of neurological disorders is a difficult process since the symptoms generally overlap between multiple disorders. Diagnosing a particular neurological condition involves a study of the medical history of the family, physical examination and imaging tests. Medications, lifestyle changes, surgery, along with supportive and rehabilitative therapies can be used to treat neurological disorders. This book presents researches that have transformed the study of neurological disorders. It is compiled in such a manner, that it will provide in-depth knowledge about the mechanisms, diagnosis and treatment of these disorders. This book will serve as a valuable source of reference for those interested in this field.