The placebo effect in Parkinson's disease.
Identifieur interne : 002F58 ( Main/Exploration ); précédent : 002F57; suivant : 002F59The placebo effect in Parkinson's disease.
Auteurs : Raúl De La Fuente-Fernández [Canada] ; A Jon StoesslSource :
- Trends in neurosciences [ 0166-2236 ] ; 2002.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Dopamine.
- metabolism : Corpus Striatum, Parkinson Disease.
- Animals, Humans, Placebo Effect, Randomized Controlled Trials as Topic, Tomography, Emission-Computed.
Abstract
The biochemical bases of the placebo effect are still incompletely known. We show here that the placebo effect in Parkinson's disease is due, at least in part, to the release of dopamine in the striatum. We propose that the placebo effect might be related to reward mechanisms. The expectation of reward (i.e. clinical benefit) seems to be particularly relevant. According to this theory, brain dopamine release could be a common biochemical substrate for the placebo effect encountered in other medical conditions, such as pain and depression. Other neurotransmitters or neuropeptides, however, are also likely to be involved in mediating the placebo effect (e.g. opioids in pain disorders, serotonin in depression).
PubMed: 12086748
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en">The biochemical bases of the placebo effect are still incompletely known. We show here that the placebo effect in Parkinson's disease is due, at least in part, to the release of dopamine in the striatum. We propose that the placebo effect might be related to reward mechanisms. The expectation of reward (i.e. clinical benefit) seems to be particularly relevant. According to this theory, brain dopamine release could be a common biochemical substrate for the placebo effect encountered in other medical conditions, such as pain and depression. Other neurotransmitters or neuropeptides, however, are also likely to be involved in mediating the placebo effect (e.g. opioids in pain disorders, serotonin in depression).</div>
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