Review article: Neural networks in psychiatry

Mental health is an intricate branch of medicine that involve the various brain circuits including frontal, temporal and occipital lobes, may also involve the structure and functional unit of brain. Many psychiatrist treat on the basis of subjective experience rather than implying the pathophysiology of the disease process. So in this article, we highlighted the concept of various brain circuits, role of neurochemicals and its involvement in various neuro-psychiatric illness like schizophrenia, Obsessive compulsive disorder, depression etc. Analogous to our human brain is Deep Neural Network (DNN) and Machine learning, based on "Graph Theory"(Artificial Neural Network), play a crucial role in working of Artificial Intelligence (AI) techniques. Various neuroimaging techniques like fMRI, is described in detail. Importance of AI in early diagnosis, individual treatment, counselling and research of various illness and AI based applications has been narrated.