Understanding mind is incomplete without taking the complete picture into consideration. For convenience of understanding mind has been divided into four levels, namely - physical, behavioral, emotional and spiritual.
Going through physical to spiritual levels, there are many streams of study which deals in understanding mind - neurology, psychiatry, psycology, philosophy and spirituality.
The meaning of disorders or abnormality drastically changes while traversing through this spectrum. Most of the mind-related problems can be easily avoided or prevented by better mind-management, individually.