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Abstract Schizophrenia is among the top 10 disabling conditions worldwide for young adults. it is a severe mental disorder characterized by fundamental disturbances in thinking, perception and emotions. More than 100 years of research have not been able to fully resolve the puzzle that schizophrenia represents. Some believed that Schizophrenia had existed as long as mankind. Research suggests that the negative symptoms of Schizophrenia which mainly include ;(flattened affect, alogia, apathy, avolition, anhedonia) contribute more to poor functional outcomes and quality of life for individuals with schizophrenia than do positive symptoms. from the start, negative symptoms have a big weight and importance in the course and prognosis of schizophrenia. Kraepelin’s Synthesis included the identification of ”dementia praecox” to refer to the clinical entity we now call schizophrenia ”Dementia” referred to the progressive deteriorating course of both emotional and cognitive processes while ”praecox” indicated the early age of onset in previously healthy individuals. |