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Abstract. Rationale: Prepulse inhibition (PPI) of startle is a measure of sensorimotor gating that is deficient in schizophrenia and in rodents treated with dopamine (DA) agonists. Reduced PPI is reported in normal humans treated with direct or indirect DA agonists. To facilitate future studies, we assessed the time course of DA agonist effects on PPI in humans, for both direct (bromocriptine: 1.25,...
Background: Functional magnetic resonance imaging (fMRI) studies in neuropsychiatric populations will be enhanced by “on-line” tasks that assess brain activation linked to neurocognitive and psychophysiological functions. In some cases, task modifications may be required for use in an fMRI environment. Prepulse inhibition (PPI) of the startle reflex is an operational measure of sensorimotor gating...
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