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Cognition-Enhancing Doses of Methylphenidate Preferentially Increase Prefrontal Cortex Neuronal Responsiveness

Biological Psychiatry, ISSN: 0006-3223, Vol: 64, Issue: 7, Page: 626-635
2008
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Article Description

Despite widespread use of low-dose psychostimulants for the treatment of attention-deficit/hyperactivity disorder (ADHD), the neural basis for the therapeutic actions of these drugs are not well understood. We recently demonstrated that low-dose methylphenidate (MPH) increases catecholamine efflux preferentially within the prefrontal cortex (PFC), suggesting that the PFC is a principal site of action in the behavioral-calming and cognition-enhancing effects of low-dose psychostimulants. To understand better the neural mechanisms involved in the behavioral actions of low-dose stimulants, this study examined the effects of low-dose MPH on the discharge properties of individual and ensembles of PFC neurons.

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