Visual object recognition deficits in early Parkinson's disease.
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.
Laatu
Sari
S
Centre for Cognitive Neuroscience, University of Turku, Assistenkatu 7, 20014, University of Turku, Finland. sari.laatu@ms-liitto.fi
Revonsuo
Antti
A
Pihko
Laura
L
Portin
Raija
R
Rinne
Juha O
JO
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