Mieke C. W. Janssen

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Impaired inhibitory control over behavior is a key feature in various psychiatric disorders, and recent studies indicated an important role for dopamine D1 and D2 receptors and the nucleus accumbens (Acb) in this respect. The present experiments were designed to study the role of dopamine D1 and D2 receptors in the Acb in inhibitory response control. Rats(More)
Impulsivity and aggression have been suggested to inversely correlate with central serotonin (5-HT) levels in a trait-like manner. However, this relationship is far from straightforward. In the present study we addressed the effect of lifelong reduced or absent serotonin transporter (SERT) function, which is associated with constitutively increased(More)
Pathological impulsivity is a prominent feature in several psychiatric disorders, but detailed understanding of the specific neuronal processes underlying impulsive behavior is as yet lacking. As recent findings have suggested involvement of the brain cannabinoid system in impulsivity, the present study aimed at further elucidating the role of cannabinoid(More)
A neuropsychological hallmark of attention deficit/hyperactivity disorder (ADHD) is the reduced ability to tolerate delay of reinforcement, leading to impulsive choice. Genetic association studies have implicated several genes involved in dopaminergic neurotransmission in ADHD. In this study, we investigated whether differences in the expression level of(More)
Disturbances in impulse control are key features of substance abuse disorders, and conversely, many drugs of abuse are known to elicit impulsive behavior both clinically and preclinically. To date, little is known with respect to the involvement of the opioid system in impulsive behavior, although recent findings have demonstrated its involvement in delay(More)
The tremendous increase in the use of mouse inbred strains and mutant mice to study the molecular basis of psychiatric disorders urges for a better understanding of attentional performance in mice. To this aim, we investigated possible strain differences in performance and cholinergic modulation of visuospatial attention in three widely used mouse inbred(More)
The present study shows that the selective cannabinoid CB1 receptor antagonist SR141716A attenuated responding for both nicotine- and sucrose-associated stimuli in a long-term extinction-reinstatement model. The results suggest that endocannabinoids play a general role in modulating cue reactivity or conditioned reinforcement following prolonged abstinence(More)
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