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Decision-making policies are subject to modulation by changing motivational states. However, so far, little is known about the neurochemical mechanisms that bridge motivational states with decision making. Here we examined whether dopamine (DA) in the nucleus accumbens core (AcbC) modulates the effects of motivational states on effort-based decision making.(More)
The medial prefrontal cortex (mPFC) and the core region of the nucleus accumbens (AcbC) are key regions of a neural system that subserves risk-based decision making. Here, we examined whether dopamine (DA) signals conveyed to the mPFC and AcbC are critical for risk-based decision making. Rats with 6-hydroxydopamine or vehicle infusions into the mPFC or AcbC(More)
1. Healthy male volunteers were exposed to either a heat condition (52 degrees C) or normal temperature (28 degrees C) receiving a single oral dose of 3 mg haloperidol or placebo in a double-blind design. 2. Ratings on aversiveness as well as on intensity of ambient temperature and saliva samples for determination of cortisol were sampled at defined(More)
Considerable evidence has implicated dopamine (DA) signals in target regions of midbrain DA neurons such as the medial prefrontal cortex or the core region of the nucleus accumbens in controlling risk-based decision-making. However, to date little is known about the contribution of DA in the orbitofrontal cortex (OFC) and the medial shell region of the(More)
BACKGROUND It is well known that brain dopamine (DA) signals support risk-based decision making; however, the specific terminal regions of midbrain DA neurons through which DA signals mediate risk-based decision making are unknown. METHODS Using microinfusions of the D1/D2 receptor antagonist flupenthixol, we sought to explore the role of D1/D2 receptor(More)
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