title: Visual object recognition deficits in early Parkinson's disease.
abstract: The nature of the visual perception deficits in Parkinson's disease (PD) has remained unclear. The present study explored whether there emerge deficits in the different stages of visual object recognition in early PD. Twenty-eight patients and 14 healthy controls were studied. A set of reaction time tasks were applied to measure the different stages of object recognition. The results indicate some selective problems in both basic perceptual and semantic visual processing at an early stage of cognitive deterioration in PD.
authors.affiliation: Centre for Cognitive Neuroscience, University of Turku, Assistenkatu 7, 20014, University of Turku, Finland. sari.laatu@ms-liitto.fi
authors.forename: Sari
authors.initials: S
authors.lastname: Laatu
authors.forename: Antti
authors.initials: A
authors.lastname: Revonsuo
authors.forename: Laura
authors.initials: L
authors.lastname: Pihko
authors.forename: Raija
authors.initials: R
authors.lastname: Portin
authors.forename: Juha O
authors.initials: JO
authors.lastname: Rinne
mesh_terms: D000368:Aged; D003072:Cognition Disorders / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000503:physiopathology*; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods*; D011930:Reaction Time / Q000502:physiology; D018709:Statistics, Nonparametric; D014796:Visual Perception / Q000502:physiology