Cholecystokinin-lnduced Effects on Selective Attention Depend on Level of Activation

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Abstract
Cholecystokinin (CCK)-like peptides, such as ceruletide, have been found to improve selective attention as indicated by the processing negativity (PN) of the event-related brain potential. The present study compared effects of ceruletide and placebo after intravenous administration of ceruletide on the PN in healthy subjects classified into two groups scoring high versus low on self-reported activation. Following placebo, PN (at Fz) was somewhat larger in subjects with low than high activation (p

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