title: Interference effects from observed movement in Parkinson's disease.
abstract: Previous research has demonstrated that Parkinson's disease patients have an increased susceptibility to response conflict. In the present study, the authors investigate whether Parkinson's patients have a similar sensitivity to interference from observed movements. In all, 10 patients and 10 controls performed horizontal and vertical arm movements while watching a video of either a person performing similar movements or a moving dot. Movements were performed in the same plane (congruent) and orthogonal to the observed movement (incongruent). The off-axis variance of movements was our index of interference. Although patients tended to exhibit more off-axis variability than did controls, both groups demonstrated similar congruence effects, with greater variance in incongruent conditions. These results indicated that increased susceptibility to interference in Parkinson's disease does not extend to interference from observed movements.
authors.affiliation: Behavioural Brain Sciences Centre, University of Birmingham, England.
authors.forename: Neil B
authors.initials: NB
authors.lastname: Albert
authors.forename: Yasmin
authors.initials: Y
authors.lastname: Peiris
authors.forename: Georgia
authors.initials: G
authors.lastname: Cohen
authors.forename: R Chris
authors.initials: RC
authors.lastname: Miall
authors.forename: Peter
authors.initials: P
authors.lastname: Praamstra
mesh_terms: D000368:Aged; D016022:Case-Control Studies; D003220:Conflict, Psychological; D005260:Female; D006801:Humans; D007100:Imitative Behavior / Q000502:physiology*; D007266:Inhibition, Psychological; D008297:Male; D008875:Middle Aged; D009433:Neural Inhibition / Q000502:physiology*; D010300:Parkinson Disease / Q000503:physiopathology* / Q000523:psychology; D011597:Psychomotor Performance / Q000502:physiology*; D012016:Reference Values; D014796:Visual Perception / Q000502:physiology