Scene categorization in Alzheimer's disease: a saccadic choice task

Dementia and Geriatric Cognitive Disorders Extra
Quentin LenobleMuriel Boucart

Abstract

We investigated the performance in scene categorization of patients with Alzheimer's disease (AD) using a saccadic choice task. 24 patients with mild AD, 28 age-matched controls and 26 young people participated in the study. The participants were presented pairs of coloured photographs and were asked to make a saccadic eye movement to the picture corresponding to the target scene (natural vs. urban, indoor vs. outdoor). The patients' performance did not differ from chance for natural scenes. Differences between young and older controls and patients with AD were found in accuracy but not saccadic latency. The results are interpreted in terms of cerebral reorganization in the prefrontal and temporo-occipital cortex of patients with AD, but also in terms of impaired processing of visual global properties of scenes.

Citations

Dec 8, 2015·Current Opinion in Neurology·Michael R MacAskill, Tim J Anderson
May 22, 2018·Journal of Alzheimer's Disease : JAD·Jessica BourginPascal Hot
Jun 12, 2018·Computational and Mathematical Methods in Medicine·Jessica BeltránJean-François Dartigues
Nov 16, 2021·Seminars in Ophthalmology·Gemma Almario, David P Piñero

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Software Mentioned

BeGaze
Experiment Center 3 ( SMI )
iViewX
Statistica
Windows

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