Science, Space and Technology News 2024
Researchers at the University of Texas at Dallas have found that age-related memory decline involves complex neural changes, challenging existing theories and underscoring the need for nuanced research into cognitive aging.
Dr. Michael Rugg, CVL director and professor of psychology in the School of Behavioral and Brain Sciences, is the senior author of a study, published online on November 30 and in the January 24 print edition ofthat found that age-related neural dedifferentiation, marked by a decline in the functional specialization of different brain regions, is driven by multiple mechanisms.
“At the category level, as we expected, we found that the older group showed reduced selectivity for scenes compared to the younger group, but not for objects,” Rugg said. “But when we looked at individual items, selectivity for both scenes and objects were reduced in the older group. This implies that the mechanisms driving dedifferentiation at the single item level are not the same as those at the category level. We had, to this point, assumed they were one and the same mechanism.
Corresponding author Sabina Srokova PhD’22, a former student of Rugg’s who is now a research associate at the University of Arizona, said the findings suggest at least two independent factors drive the reduction in selectivity in older adults.
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