title: Stress affects hedonic responses but not reaching-grasping in Parkinson's disease.
abstract: Stress can transiently increase motor symptoms of Parkinson's disease (PD), but it is unclear whether other behavioural changes associated with PD are also affected. We found that reaching-grasping was impaired in 19 PD patients compared with 19 matched controls, but these impairments were not amplified by stress. However, patients showed a stress-induced reduction of hedonic responses. Stress may amplify those impairments in PD that are not accessible to cognitive control.
authors.affiliation: University of Würzburg, Department of Psychology (Biological Psychology, Clinical Psychology and Psychotherapy), Marcusstrasse 9-11, 97070 Würzburg, Germany. macht@psychologie.uni-wuerzburg.de
authors.forename: Michael
authors.initials: M
authors.lastname: Macht
authors.forename: Susanne
authors.initials: S
authors.lastname: Brandstetter
authors.forename: Heiner
authors.initials: H
authors.lastname: Ellgring
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D016022:Case-Control Studies; D004644:Emotions / Q000502:physiology*; D005260:Female; D018737:Hand Strength / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000503:physiopathology* / Q000523:psychology*; D011597:Psychomotor Performance / Q000502:physiology*; D013312:Stress, Physiological