Journal of Neuropsychology

Skip to Search

Skip to Navigation

Early View Articles

Motion‐induced position mis‐localization predicts the severity of Alzheimer's disease

Patients with Alzheimer's disease (AD) often exhibit motion processing deficits. It is unclear whether the localization of moving objects – a perceptual process tightly linked to motion – is impaired or intact in AD. In this study, we used the phenomenon of illusory shift of position induced by motion as a behavioural paradigm to probe how the spatial representation differs between AD patients and healthy elderly controls. We measured the magnitudes of motion‐induced position shift in a group of AD participants (N = 24) and age‐matched elderly observers (N = 24). We found that AD patients showed weakened position mis‐localization, but only for motion stimuli of slow speeds. For fast motion, the position mis‐localization did not differ significantly between groups. Furthermore, we showed that the magnitudes of position mis‐localization can predict the severity of AD; that is, patients with more severe symptoms had less preserved position mis‐localization. Our results suggest that AD pathology impacts not only motion processing per se, but also the perceptual process related to motion such as the localization of moving objects.

Add This link

Bookmark and Share>