Is processing efficiency of a verbal working memory system modulated by amphetamine : an fMRI investigation?
The results are consistent with the hypothesis that the neurochemical effects of amphetamine modulate the efficiency of a verbal working memory system. The effect of amphetamine on working memory in healthy individuals may provide insight regarding the working memory deficits seen in schizophrenia, given the overlap between neurochemical systems affected by amphetamine, and those disordered in schizophrenia.
For MPO measurements, EDTA-plasma is the preferred specimen as it appears unaffected by ex vivo release of MPO from leukocytes.