Levodopa reverses gait asymmetries related to anhedonia and magical ideation.
Details
Serval ID
serval:BIB_984411E89E46
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Levodopa reverses gait asymmetries related to anhedonia and magical ideation.
Journal
European Archives of Psychiatry and Clinical Neuroscience
ISSN
0940-1334 (Print)
ISSN-L
0940-1334
Publication state
Published
Issued date
2005
Peer-reviewed
Oui
Volume
255
Number
1
Pages
33-39
Language
english
Notes
Publication types: Clinical Trial ; Comparative Study ; Journal Article ; Randomized Controlled Trial ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Publication Status: ppublish
Abstract
Animals and men turn preferentially away from the hemisphere with the more active dopamine (DA) system. Consistent with the idea of a right-hemispheric hyperdopaminergia in schizophrenia, a leftsided turning bias was described for unmedicated psychotic patients. We investigated the modulating role of DA and schizophrenia-like thought on whole-body turns in a controlled double-blind study. The number of veers to either side when walking blindfolded straight ahead (20 meter) was assessed in 40 healthy righthanded men (20 men received levodopa, the remaining participants placebo). Side preferences were analyzed in terms of individuals' positive (Magical Ideation, MI) and negative (Physical Anhedonia, PhysAn) schizotypal features. In the placebo group, increasing MI scores were related to increasing left-sided veering and increasing PhysAn scores were related to increasing right-sided veering. In the levodopa group, this relationship between preferred veering side and type of schizotypy was reversed. The finding in the placebo group suggests an association between MI and a relative right-hemispheric hyperdopaminergia. Unexpectedly, levodopa did not enhance this veering bias, but reversed it, suggesting that psychosis-protective mechanisms exist in the healthy positive "schizotypic" brain. Also unexpectedly, levodopa made "anhedonics" veer like "magics" after placebo, suggesting that DA agonists suppress negative schizotypal symptoms.
Keywords
Adult, Chromatography, High Pressure Liquid/methods, Dopamine Agents/blood, Dopamine Agents/pharmacology, Double-Blind Method, Electrochemistry/methods, Functional Laterality/physiology, Gait/drug effects, Humans, Levodopa/blood, Levodopa/pharmacology, Magic/psychology, Male, Movement/drug effects, Movement/physiology, Psychomotor Performance/physiology, Schizophrenic Psychology, Statistics as Topic
Pubmed
Create date
17/01/2011 19:07
Last modification date
20/08/2019 14:59