TY - JOUR
T1 - A failure of 'pop-out' in visual search tasks in dementia with Lewy Bodies as compared to Alzheimer's and Parkinson's disease
AU - Cormack, Francesca
AU - Gray, Alistair
AU - Ballard, Clive
AU - Tovée, Martin J.
PY - 2004/8/1
Y1 - 2004/8/1
N2 - Objectives. The pattern of neural damage in dementia with Lewy Bodies (DLB) led us to hypothesize that patients with DLB would be particularly impaired on parallel ('pop-out') search tasks, relative to serial search tasks, and that this would serve to distinguish DLB from other forms of neurodegenerative disease, particularly Alzheimer's disease (AD). Method. To explore this possibility we tested four groups of observers (DLB, Alzheimer's Disease, Parkinson's Disease and age-matched controls) on parallel and serial search tasks, and a choice reaction time task. Results. The DLB participants performed in a quantitatively and qualitatively different manner to the other groups. As predicted, they were particularly impaired on the parallel search task relative to the other observer groups. Conclusions. This pattern of deficit may reflect damage in the occipital areas leading to deficits in figure-ground segregation, and can assist differential diagnosis of DLB from other patients groups such as AD.
AB - Objectives. The pattern of neural damage in dementia with Lewy Bodies (DLB) led us to hypothesize that patients with DLB would be particularly impaired on parallel ('pop-out') search tasks, relative to serial search tasks, and that this would serve to distinguish DLB from other forms of neurodegenerative disease, particularly Alzheimer's disease (AD). Method. To explore this possibility we tested four groups of observers (DLB, Alzheimer's Disease, Parkinson's Disease and age-matched controls) on parallel and serial search tasks, and a choice reaction time task. Results. The DLB participants performed in a quantitatively and qualitatively different manner to the other groups. As predicted, they were particularly impaired on the parallel search task relative to the other observer groups. Conclusions. This pattern of deficit may reflect damage in the occipital areas leading to deficits in figure-ground segregation, and can assist differential diagnosis of DLB from other patients groups such as AD.
KW - Alzheimer's disease
KW - Dementia with Lewy Bodies
KW - Parallel visual search
KW - Parkinson's disease
KW - Serial visual search
KW - Visual attention
UR - http://www.scopus.com/inward/record.url?scp=4344660141&partnerID=8YFLogxK
U2 - 10.1002/gps.1159
DO - 10.1002/gps.1159
M3 - Article
C2 - 15290700
AN - SCOPUS:4344660141
VL - 19
SP - 763
EP - 772
JO - International Journal of Geriatric Psychiatry
JF - International Journal of Geriatric Psychiatry
SN - 0885-6230
IS - 8
ER -