title: Dysfunction in attentional processing in patients with Parkinson's disease and visual hallucinations.
abstract: Mechanistic insights into visual hallucinations (VH) in Parkinson's disease (PD) have suggested a role for impaired attentional processes. The current study tested 25 PD patients with and 28 PD patients without VH on the attentional network test. Hallucinators had significantly lower accuracy rates compared to non-hallucinators, but no differences were found in reaction times. This suggests that hallucinators show deficits in attentional processes and conflict monitoring. Our findings provide novel behavioural insights that dovetail with current neurobiological frameworks of VH.
authors.affiliation: Parkinson's Disease Research Clinic, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia.|School of Social Sciences and Psychology, Western Sydney University, Sydney, NSW, Australia.
authors.forename: Julie M
authors.initials: JM
authors.lastname: Hall
authors.affiliation: Parkinson's Disease Research Clinic, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia.|Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK.
authors.forename: Claire
authors.initials: C
authors.lastname: O'Callaghan
authors.affiliation: Parkinson's Disease Research Clinic, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia.|School of Psychology, Stanford University, Palo Alto, CA, USA.|Neuroscience Research Australia, University of New South Wales, Sydney, NSW, Australia.
authors.forename: James M
authors.initials: JM
authors.lastname: Shine
authors.affiliation: Parkinson's Disease Research Clinic, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia.
authors.forename: Alana J
authors.initials: AJ
authors.lastname: Muller
authors.affiliation: School of Social Sciences and Psychology, Western Sydney University, Sydney, NSW, Australia.
authors.forename: Joseph R
authors.initials: JR
authors.lastname: Phillips
authors.affiliation: Parkinson's Disease Research Clinic, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia.
authors.forename: Courtney C
authors.initials: CC
authors.lastname: Walton
authors.affiliation: Parkinson's Disease Research Clinic, Brain and Mind Centre, University of Sydney, Sydney, NSW, Australia. simonl@med.usyd.edu.au.
authors.forename: Simon J G
authors.initials: SJ
authors.lastname: Lewis
authors.affiliation: School of Social Sciences and Psychology, Western Sydney University, Sydney, NSW, Australia.|MARCS Institute for Brain, Behaviour and Development, Western Sydney University, Sydney, NSW, Australia.
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Moustafa
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D001289:Attention Deficit Disorder with Hyperactivity / Q000209:etiology*; D005260:Female; D006212:Hallucinations / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010300:Parkinson Disease / Q000150:complications*; D011930:Reaction Time / Q000502:physiology; D018709:Statistics, Nonparametric
keywords: Attentional network test; Dorsal attentional network; Parkinson’s disease; Visual hallucinations