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• W2001003983 abstract "<h3>Context</h3>Schizophrenic symptoms are linked to a dysfunction of dopamine neurotransmission and the brain reward system. However, it remains unclear whether antipsychotic treatment, which blocks dopamine transmission, improves, alters, or even worsens the reward-related abnormalities.<h3>Objective</h3>To investigate changes in reward-related brain activations in schizophrenia before and after antipsychotic monotherapy with a dopamine D₂/D₃ antagonist.<h3>Design</h3>Longitudinal cohort study.<h3>Setting</h3>Psychiatric inpatients and outpatients in the Capital Region of Denmark.<h3>Participants</h3>Twenty-three antipsychotic-naive patients with first-episode schizophrenia and 24 healthy controls initially matched on age, sex, and parental socioeconomic status were examined with functional magnetic resonance imaging while playing a variant of the monetary incentive delay task.<h3>Interventions</h3>Patients were treated for 6 weeks with the antipsychotic compound amisulpride. Controls were followed up without treatment.<h3>Main Outcome Measures</h3>Task-related blood oxygen level–dependent activations as measured by functional magnetic resonance imaging before and after antipsychotic treatment.<h3>Results</h3>At baseline, patients, as compared with controls, demonstrated an attenuation of brain activation during reward anticipation in the ventral striatum, bilaterally. After 6 weeks of treatment, patients showed an increase in the anticipation-related functional magnetic resonance imaging signal and were no longer statistically distinguishable from healthy controls. Among the patients, there was a correlation between the improvement of positive symptoms and normalization of reward-related activation. Those who showed the greatest clinical improvement in positive symptoms also showed the greatest increase in reward-related activation after treatment.<h3>Conclusions</h3>To our knowledge, this is the first controlled, longitudinal study of reward disturbances in schizophrenic patients before and after their first antipsychotic treatment. Our results demonstrate that alterations in reward processing are fundamental to the illness and are seen prior to any treatment. Antipsychotic treatment tends to normalize the response of the reward system; this was especially seen in the patients with the most pronounced treatment effect on the positive symptoms.<h3>Trial Registration</h3>clinicaltrials.gov Identifier: NCT01154829." @default.
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• W2001003983 date "2012-12-01" @default.
• W2001003983 modified "2023-10-05" @default.
• W2001003983 title "Improvement of Brain Reward Abnormalities by Antipsychotic Monotherapy in Schizophrenia" @default.
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• W2001003983 doi "https://doi.org/10.1001/archgenpsychiatry.2012.847" @default.
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