The brain is most complex and magnificent organs in the human body. Brain gives us awareness, environment, emotions, feeling, etc. It controls our muscle movements, the secretions of our glands, and even our breathing and internal temperature. Every creative thought, feeling, and plan is developed by our brain. The brain’s neurons record the memory of every event in our lives. In this study we used on recent advances in magnetic resonance (MR) data acquisition and post-acquisition processing techniques to determine quantitatively in the living human premature and term infant developmental changes in total brain volume and in the total volumes of cerebral gray matter (GM), unmyelinated white matter (WM), myelinated WM and cerebrospinal fluid (CSF). “Emotion and economy” describes a relation that social scientists have recently begun to acknowledge. Outside of various fields of psychology, sociologists and economists often treat emotions as residual categories. In this paper we try to explain brain function of human and relation of GM and WM with human emotion.