Luisa Kessler

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The neurochemical specificity of physiological, biochemical, and psychological responses to dextroamphetamine was tested by pretreating volunteers with haloperidol (0.014 mg/kg IM), propranolol (0.1 mg/kg IV), thymoxamine (0.1 mg/kg IV), or placebo prior to 0.3 mg/kg IV amphetamine. Healthy volunteers (N = 12) participated in the studies, but not all(More)
An i.v. injection of dextroamphetamine (0.3 mgm/kg) was given to 13 pairs of normal monozygotic twins, three pairs of normal dizygotic twins and 11 patients with bipolar affective disorder in remission and off medications. Behavioral excitation in response to amphetamine was highly correlated in monozygotic twins; it was predicted by the baseline variables(More)
Adolescent risk taking is strongly influenced by peer presence. The aim of the present study was to investigate the effect of peer presence on the ERP after negative and positive feedback in the time range of the feedback-related negativity (FRN). Eighteen male adolescents completed a version of the Balloon Analogue Risk Task (BART) under two conditions:(More)
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