title: Horizontal and vertical attentional orienting in Parkinson's disease.
abstract: Patients with Parkinson's disease (PD) typically suffer from an asymmetric degeneration of dopaminergic cells in the substantia nigra, resulting in right-sided (RPD) or left-sided (LPD) predominance of motor symptomatology. As the dopaminergic system is also involved in attention, we examined horizontal and vertical orienting of attention in LPD (N=10), RPD (N=9) and controls (N=10). Four LPD patients demonstrated left neglect and three LPD patients demonstrated neglect for the upper visual field. LPD patients demonstrated a slower performance in detecting targets in the left hemifield and did not demonstrate a validity effect, unlike RPD patients and controls. RPD patients performed similar to controls, with the exception of one patient showing left and another showing right neglect, and two RPD patients demonstrated lower neglect. In sum, horizontal and vertical orienting of attention can be affected in Parkinson's disease - particularly in LPD - from very subtle slowing to clinically detectable horizontal and/or vertical neglect.
authors.affiliation: Laboratory for Neuropsychology, Department of Neurology, Ghent University, De Pintelaan 185 (4K3) 9000 Gent, Belgium. gudrun.nys@ugent.be
authors.forename: Gudrun M S
authors.initials: GM
authors.lastname: Nys
authors.forename: Patrick
authors.initials: P
authors.lastname: Santens
authors.forename: Guy
authors.initials: G
authors.lastname: Vingerhoets
mesh_terms: D000368:Aged; D001288:Attention; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D009949:Orientation; D010300:Parkinson Disease / Q000150:complications / Q000503:physiopathology*; D010468:Perceptual Disorders / Q000209:etiology / Q000503:physiopathology*; D011597:Psychomotor Performance; D014794:Visual Fields