Multiple Personality Defined as the occurence of two or more personalities within the same individual, each of which during sometime in the person's life is able to take control. This is not often a mentally healthy thing when the personalities vy for control. Symptoms are of course somewhat self-explanatory, but it is important to note that often the personalities are very different in nature, often representing extremes of what is contained in a normal person. Sometimes, the disease is assymetrical, which means that what one personality knows, the others inherently know. This is the continued presence of feelings that the person is not oneself or that they can't control their own actions.
Symptoms are a change in the person's perception of themselves.
The disease may incur strange feelings that one's limbs are not shaped or sized correctly. It also may cause a sense of being outside of one's body. The person perceives others as mechanical as if they existed in a dream. The afflicted have a constant worry about going insane.