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• W2404236473 abstract "Previous studies have showed that spatial memory declines with age but have not clarified the relevance of different landmark cues for specifying heading directions among different age groups. This study examined differences between younger, middle-aged and older adults in route learning and memory tasks after they navigated a virtual maze that contained: (a) critical landmarks that were located at decision points (i.e., intersections) and (b) non-critical landmarks that were located at non-decision points (i.e., the sides of the route). Participants were given a recognition memory test for critical and non-critical landmarks and also given a landmark-direction associative learning task. Compared to younger adults, older adults committed more navigation errors during route learning and were poorer at associating the correct heading directions with both critical and non-critical landmarks. Notably, older adults exhibited a landmark-direction associative memory deficit at decision points; this was the first finding to show that an associative memory deficit exist among older adults in a navigational context for landmarks that are pertinent for reaching a goal, and suggest that older adults may expend more cognitive resources on the encoding of landmark/object features than on the binding of landmark and directional information. This study is also the first to show that older adults did not have a tendency to process non-critical landmarks, which were regarded as distractors/irrelevant cues for specifying the directions to reach the goal, to an equivalent or larger extent than younger adults. We explain this finding in view of the low number of non-critical cues in our virtual maze (relative to a real-world urban environment) that might not have evoked older adults' usual tendency toward processing or encoding distractors. We explain the age differences in navigational and cognitive performance with regards to functional and structural changes in the hippocampus and parahippocampus, and recommend further investigations into the functional connectivity between the prefrontal cortex and hippocampus for a better understanding of the landmark-direction associative learning among the elderly. Finally, it is hoped that the current behavioral findings will facilitate efforts to identify the neural markers of Alzheimer's disease, a disease that commonly involves navigational deficits." @default.
• W2404236473 created "2016-06-24" @default.
• W2404236473 creator A5038370870 @default.
• W2404236473 creator A5091582964 @default.
• W2404236473 date "2016-05-27" @default.
• W2404236473 modified "2023-10-10" @default.
• W2404236473 title "Age-Related Differences in Associative Learning of Landmarks and Heading Directions in a Virtual Navigation Task" @default.
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• W2404236473 doi "https://doi.org/10.3389/fnagi.2016.00122" @default.
• W2404236473 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4882336" @default.
• W2404236473 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27303290" @default.
• W2404236473 hasPublicationYear "2016" @default.
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• W2404236473 citedByCount "42" @default.

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