Anxiety Behaviour - apathetic Behaviour - changes
Behaviour - cathatonic Behaviour - irritability Behaviour - lack of emotions
Behaviour - mood changes Behaviour - social isolation Delusion
Hallucinations Insomnia Memory - loss
Mental concentration - disorder Mental confusion Mental depression
Mental orientation - loss Mental reasoning - difficulty Movements - loss of coordination
Movements - slowness Speech - changes Speech - difficulty
Schizophrenia is a mental disorder characterized by profound disruption in cognition and poor emotional responsiveness. Changes in thinking and behavior are the most obvious symptoms of schizophrenia. People experience signs and symptoms of schizophrenia in different ways.

The disorder mainly affects:

- Cognition,

- Behavior, and

- Emotion.

Signs and symptoms of schizophrenia generally are divided into three categories:

- Positive, meaning increase or alteration of normal functions, such as hallucinations and thought disorders.

- Negative, reflecting decrease or loss of normal functions like social withdrawal, lack of emotions, or loss of motivation.

- Cognitive. These symptoms may be difficult to recognize as part of the disorder because they are related to the thinking processes. Examples of cognitive symptoms can be memory problems and difficulty to understand information.

In addition, there are three major subtypes of schizophrenia:

- Paranoid schizophrenia, in which delusions of persecution are common.

- Disorganized schizophrenia can be recognized by disorganized speech, infant-like behavior and inappropriate emotions.

- Catatonic schizophrenia mainly reflects the lack or excess of motor activity.

The causes of schizophrenia are still unknown. However, genes may play a role. Environmental factors can cause high levels of stress and may trigger the disorder by increasing the body’s production of cortisol.
No single symptom is definitive for diagnosis. There are no medical tests or standard criteria to diagnose schizophrenia. For instance, in Europe is used the criteria ICD-10 while in others countries around the world is used the system DSM-IV-TR. Diagnosis is approached according to the reported mental abnormalities of each patient.
  More information:
Schizophrenia Treatment
Schizophrenia Healthcare Centers

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