Double-blind randomized trial of risperidone versus divalproex in pediatric bipolar disorder: fMRI outcomes

Mani N. Pavuluri, Alessandra M. Passarotti, Lisa H. Lu, Julie A. Carbray, John A. Sweeney

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

The aim of this research was to determine the relative effects of risperidone and divalproex on brain function in pediatric mania. This is a double-blind 6-week functional magnetic resonance imaging trial with 24 unmedicated manic patients randomized to risperidone or divalproex, and 14 healthy controls (HCs) matched for IQ and demographic factors (mean age: 13.1 ± 3.3. years). A pediatric affective color matching task, in which subjects matched the color of a positive, negative or neutral word with one of two colored circles, was administered. The primary clinical measure was the Young Mania Rating Scale (YMRS). The risperidone group, relative to HC, showed an increase in activation from pre- to post-treatment in right pregenual and subgenual anterior cingulate cortex and decreased activation in bilateral middle frontal gyrus during the negative condition; and decreased activation in left inferior and medial, and right middle frontal gyri, left inferior parietal lobe, and right striatum with positive condition. In the divalproex group, relative to HC, there was an increased activation in right superior temporal gyrus in the negative condition; and in left medial frontal gyrus and right precuneus with the positive condition. Greater pre-treatment right amygdala activity with negative and positive condition in the risperidone group, and left amygdala activity with positive condition in divalproex group, predicted poor response on YMRS. Risperidone and divalproex yield differential patterns of prefrontal activity during an emotion processing task in pediatric mania. Increased amygdala activity at baseline is a potential biomarker predicting poor treatment response to both the risperidone and divalproex.

Original languageEnglish (US)
Pages (from-to)28-37
Number of pages10
JournalPsychiatry Research - Neuroimaging
Volume193
Issue number1
DOIs
StatePublished - Jul 30 2011

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Keywords

  • Adolescent
  • Child
  • Mania
  • Medication
  • Prefrontal
  • Treatment

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Radiology Nuclear Medicine and imaging
  • Psychiatry and Mental health

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