Neuropsychiatric disorders prevalence

Schizophrenia is a complex neuropsychiatric disorder with a prevalence of nearly 1% of the world population. Clinically, schizophrenia is characterized by chronic psychotic symptoms and psychosocial impairment. At least two core syndromes of schizophrenia, the positive and the negative, are recognized (Liddle, 1987). Those in whom positive symptoms predominate have hallucinations, delusions, and paranoid ideation. Those with negative symptoms have apathy and anledonia. Besides impairment in the cognitive domain, individuals with schizophrenia show a deficit in emotion processing, as indicated by a markedly reduced ability to perceive, process, and express facial emotions (Aleman et al., 1999). 

In zooo, the prevalence of cerebral palsy in metropolitan Adanta was 3.1 per 1000 8-year-olds. Of 10-year-old children, 23 of every 10,000 had cerebral palsy. Eighty-one percent of these children had spastic cerebral palsy. Seventy-five percent had one or more other disabilities (epilepsy, mental retardation, hearing loss, or vision impairment).7 Like many neurological and neuropsychiatric disorders, a diagnosis of cerebral palsy is a description of symptoms, not an identification of causes. 

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