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High Choline Concentrations in the Caudate Nucleus in Antipsychotic-Naive Patients With Schizophrenia

OBJECTIVE: Proton magnetic resonance spectroscopy (¹H-MRS) studies of medicated patients with schizophrenia suggest high choline levels in the caudate nucleus. However, assessments of antipsychotic-naive patients are needed. METHOD: The authors studied 11 antipsychotic-naive schizophrenia patients and 11 normal comparison subjects with single-voxel ¹H-MRS of the left caudate nucleus. Concentrations of N-acetylaspartate, choline, and creatine were determined and corrected for the proportion of cerebrospinal fluid in the voxel. RESULTS: The patients with schizophrenia had significantly higher levels of choline than the comparison subjects, while the other two metabolites did not differ between groups. CONCLUSIONS: High caudate choline levels in schizophrenia are not secondary to antipsychotic treatment.

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