Analysis of the Perception of Static and Dynamic Events in People with Alzheimer’s Disease
摘要
One of the aspects affected in Alzheimer’s disease is language. The nature and manifestations of these difficulties are related to the way Alzheimer’s patients perceive and understand the world around them. In this research, the visual fixations of seven Alzheimer’s patients and their controls during tasks of perception of static and dynamic scenes (image and video, respectively) were analyzed. Similarly, a sample of language produced by the patients when narrating the dynamic event was analyzed. The results indicate significant differences in visual search, in which the group with Alzheimer’s showed a decrease in speed. In tracking tasks, it is evident that people with Alzheimer’s identify fewer elements in an image, making fewer fixations, with inefficient exploration strategies. Regarding the dynamic event, the visual tracking was similar between the two groups; however, the linguistic expression of what was observed is affected in the group with Alzheimer’s, revealing the relationship of perception and language, since despite observing the events within a moving scene, these are not subsequently recalled, being expressed linguistically. These results have important implications both in the identification of the nature of the linguistic difficulties in Alzheimer’s as well as in its management.