Schizophrenia is defined as a serious and disabling mental illness. A person with this condition may be completely disconnected from what is happening around them. For example, a person suffering from schizophrenia may hear voices, see people who are not there (ghosts in other words), and/or feel insects crawling on their skin when in reality there are them. They may also have disorganized speech and behavior, be physically rigid, emotionless, and have delusions. The type of delusions in which they believe that people read their minds, control their thoughts, and/or plot to harm them. They struggle to hold a job and take care of themselves. The word schizophrenia has been used since 1911 in the name of Eugen Bleuler. In 1887, it was simply an independent mental illness recognized by Dr. Emile Kraepelin. It has been described in ancient Egyptian, Hindu, Chinese, Greek and Roman writings with symptoms similar to those of modern-day schizophrenia. In medieval times, schizophrenia was just evidence that a person was possessed by evil powers or spirits. The general population has a 1% chance of getting schizophrenia. About 60% of people with schizophrenia have no family members with the disorder, but it can be hereditary. Although it cannot be passed down directly from one generation to another. A person is 10% more likely to contract schizophrenia if their mother, father, brother or sister has it. Additionally, if a person has an uncle, aunt, cousins, or grandparents with schizophrenia, they are more likely to get the illness than the general population. No single gene can cause schizophrenia. This disease may result from the gene responsible for malfunctioning important brain chemicals. This dysfunction can affect the ......ability of the middle of paper, this is where they can move their arm into a certain position and then hold it in the exact same place for hours. Excessive mobility is where, instead of being unable to move, they may move in an excited manner that appears for no reason. They may pace, spin continuously, make rapid arm movements, or make loud noises. With extreme resistance, they can be very stubborn, they do not listen to instructions. They will resist attempts to move or may not speak at all. Peculiar movements occur when the schizophrenic has an unusual posture, grimaces for long periods of time, or uses a strange mannerism. They may also repeat certain behaviors, such as repeating words, following a regiment obsessively, or needing to have objects in exactly the same way. Imitating speech or movement is when they repeatedly say a word someone has just said or excessively copy a gesture made by someone else..