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Edi Frei

2 papers in the library · 256 citations · publishing 2000-2001

Papers

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Localization of MDMA‐induced brain activity in healthy volunteers using low resolution brain electromagnetic tomography (LORETA)

Human Brain Mapping August 27, 2001 Edi Frei, Alex Gamma, Roberto D Pascual-Marqui et al. 175 citations

Abstract 3,4‐Methylenedioxymethamphetamine (MDMA; 'Ecstasy') is a psychostimulant drug producing heightened mood and facilitated social communication. In animal studies, MDMA effects are primarily mediated by serotonin (5‐HT), but also by dopamine (DA) and possibly noradrenaline (NA). In humans, however, the neurochemical and neurophysiological basis of acute MDMA effects remains unknown. The...

Mood state and brain electric activity in Ecstasy users

Neuroreport 2000 Alex Gamma, Edi Frei, Dietrich Lehmann et al. 81 citations

Resting EEG during open and closed eyes and subsequent mood ratings were obtained from 15 Ecstasy users and 14 Ecstasy-naive controls. Absolute spectral power on the scalp, and the three-dimensional, intracerebral distribution of neuroelectric activity using low resolution brain electromagnetic tomography (LORETA) were computed. LORETA revealed global increases of theta, alpha 1 and beta 2/3...