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Published on: February 14, 2014
Cognitive decline and human (Homo sapiens) aging: an investigation using a comparative neuropsychological approach
Isabelle Boutet1, Norton W Milgram, Morris Freedman
1School of Psychology, University of Ottawa, Ottawa, ON, Canada. iboutet@uottawa.ca
Abstract:
Using a comparative neuropsychological approach, the authors compared performance of younger and healthy older adults ages 65 and over on tasks originally developed to measure cognition in animals. A battery of 6 tasks was used to evaluate object discrimination, egocentric spatial abilities, visual and spatial working memory, and response shifting. Older adults performed more poorly than younger adults on tasks that evaluate egocentric spatial abilities, response shifting, and to a lesser extent object recognition. The two groups did not differ for tasks that evaluate spatial working memory and object discrimination. The impairments the authors observed in tasks that evaluate response shifting and object recognition are consistent with those found in canines and primates as well as those found in Alzheimer's disease. The results are consistent with the notion that cognitive processes supported by the amygdala and the orbitofrontal cortex are among the first to decline with increasing age in both humans and animals.
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