Severe Hearing Impairment

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Dopamine regulates aspects of everyday behavior. Dopamine is used by neurons that control voluntary muscle movement. Abnormally high levels of Dopamine are associated with schizophrenia. Schizophrenia is a severe mental illness involving irrational thoughts, hallucinations, poor contact with reality, and deterioration of routine adaptive behavior. About one percent of the population has schizophrenia and requires more hospitalization than any other psychological disorder. In December 2014, an article was written to study whether individuals with severe hearing impairment who experience social defeat show a greater dopamine release. The study was done to prove these individuals have an increase for a schizophrenic experience. According to …show more content…

There were nineteen participants with severe hearing impairment who underwent single-photon emission computed tomography with iodine 123-labeled iodobenzamide this was used to detect dopamine before and after amphetamines where given. This was done in a teaching hospital. The dextroamphetamine was given to the participants to stimulate the central nervous system. A Fletcher index was used to determine if the recruited participants were severally hearing impaired. They were paired up with normal hearing individuals used as the control group. There were other criteria such as age, skin color, and tobacco habits, but they did not affect the results. Individuals with existing history of substance abuse, …show more content…

This regulates the cognitive part of our brain if the release of dopamine is disrupted this function is impaired, allowing the features of schizophrenia to be seen. In November, 2009 an article was written about a study that examined the effects of polymorphism in the dopamine transporter gene. It was performed at a psychiatric research center. It showed how dopamine existing in different forms will have different effects on the brains of patients with schizophrenia. It gets pumps out of the brains synapse and back in the cytosol; the liquid in the cells. The change should give an effect on prefrontal, or speech and language. It will also have an effect on striatal or cognitive functions. This will show altered dopamine functions. The aim of this study was to examine the influence of dopamine transporter 3’UTR VNTR on regional brain function during a verbal fluency task and to assess this is altered in schizophrenic patients. Functional magnetic resonance imaging was used to study the volunteers. They performed a phonologic verbal fluency test which effects the prefrontal, insular, and cingulate cortex; the striatum, and the thalamus (Hutchinson, 1999). Impaired performance will be seen in these areas of the brain in patients with schizophrenia. Eighty Five subjects participated, forty four healthy volunteers (eighteen who were 9-repeat carriers and 26 who were

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