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Eye movements in visual search indicate impaired saliency processing in Parkinson's disease

Mannan, Sabira K. and Hodgson, Timothy L. and Husain, Masud and Kennard, Christopher (2008) Eye movements in visual search indicate impaired saliency processing in Parkinson's disease. Progress in Brain Research, 171 . pp. 559-562. ISSN 0079-6123

Full content URL: http://dx.doi.org/10.1016/S0079-6123(08)00679-1

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Item Type:Article
Item Status:Live Archive

Abstract

Previous studies have produced contradictory evidence on the nature of the visual search impairment in patients with Parkinson's disease (PD). Eye movements were measured during multi-target search in nine individuals with mild-to-moderate PD. Subjects were asked to click on a response button whenever they judged they were fixating a target for the first time. Compared to age-matched healthy volunteers, PD patients were impaired at efficient search (detecting "+"s amongst "L"s) but not inefficient search ("T"s amongst "L"s). However, these patients had normal memory for locations as indexed by their rate of re-clicking on previously inspected locations. We suggest that the pattern of gaze for efficient search may reflect impaired saliency processing in PD. © 2008 Elsevier B.V. All rights reserved.

Additional Information:Using Eye Movements as an Experimental Probe of Brain function — A Symposium in Honor of Jean Büttner-Ennever
Keywords:adult, aged, clinical article, eye movement, gaze, human, memory, Parkinson disease, priority journal, review, visual system, Aged, Eye Movements, Fixation, Ocular, Humans, Middle Aged, Visual Perception
Subjects:C Biological Sciences > C850 Cognitive Psychology
Divisions:College of Social Science > School of Psychology
ID Code:10525
Deposited On:17 Jul 2013 13:48

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