Chapter 8: General Concepts of Mental Diseases (Causes,Course, Classification,Diagnosis, and Treatment)

Mental disease is a disturbance of the functioning of the human organism, principally disease of the brain, primarily its higher levels. Inasmuch as the brain is the regulator of all body functions, damage to it results not only in disturbance of its most important function, mental activity, but also, unavoidably, of the activity of other organs and systems, to some extent.