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Original article| Volume 37, ISSUE 6, P402-409, March 15, 1995

First month of neuroleptic treatment in schizophrenia: Only partial normalization of the late positive components of visual ERP

DOI:https://doi.org/10.1016/0006-3223(94)00145-S
First month of neuroleptic treatment in schizophrenia: Only partial normalization of the late positive components of visual ERP
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      In a previous study we recorded visual event-related potentials (ERP) in drug-naive schizophrenics during passive-attention and active-attention tasks. Patients, compared to normal controls, had much lower late positive components (LPC) in both sessions, but nearly normal LPC increase from passive to active task. The present sample consisted of drug-naive and drug-free patients who were tested before and during the first month of neuroleptic treatment. Neuroleptics initiated gradual amelioration of psychiatric symptoms expressed by reduced Brief Psychiatric Rating Scale (BPRS) scores. Schizophrenics compared to controls showed a session-related increase in LPC amplitude, but this process of LPC recovery, was too minor to fully, normalize the low LPC amplitudes in patients. Furthermore, the treatment either did not improve or even reduce the LPC reaction to the active-attention task. These findings indicate that normalization of low LPC in schizophrenia might require a long period of treatment, and that patients' reduced LPC reactivity to the task might be contributed, rather than treated, by neuroleptics.

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      Article info

      Publication history

      Received in revised form: March 28, 1994
      Received: June 1, 1993

      Footnotes

      This study was supported by Grant 86 from the Israel Foundations Trustees to M.M.

      Identification

      DOI: https://doi.org/10.1016/0006-3223(94)00145-S

      Copyright

      © 1995 Society of Biological Psychiatry. Published by Elsevier Inc.

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