EEG correlates of visual short-term memory in older age vary with adult lifespan cognitive development
| Autor: | Nelly Richard, Krisztina Benedek, Egill Rostrup, Merete Osler, Erik Lykke Mortensen, Anna Horwitz, Lene Rask, Iris Wiegand, Signe Vangkilde, Martin Lauritzen, Anders Petersen |
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| Rok vydání: | 2017 |
| Předmět: |
Adult
Male Aging Electroencephalography 050105 experimental psychology Cohort Studies Healthy Aging 03 medical and health sciences Young Adult 0302 clinical medicine Cognition Cognitive Changes Cognitive development medicine Reaction Time Humans 0501 psychology and cognitive sciences Attention Cognitive Dysfunction Visual short-term memory Young adult Cognitive decline medicine.diagnostic_test Intelligence quotient General Neuroscience 05 social sciences Middle Aged Memory Short-Term Cognitive Aging Visual Perception Neurology (clinical) Geriatrics and Gerontology Psychology 030217 neurology & neurosurgery Photic Stimulation Developmental Biology Cognitive psychology |
| Zdroj: | Neurobiology of Aging |
| ISSN: | 1558-1497 |
| Popis: | Visual short-term memory (vSTM) is a cognitive resource that declines with age. This study investigated whether electroencephalography (EEG) correlates of vSTM vary with cognitive development over individuals' lifespan. We measured vSTM performance and EEG in a lateralized whole-report task in a healthy birth cohort, whose cognitive function (intelligence quotient) was assessed in youth and late-middle age. Higher vSTM capacity (K; measured by Bundesen's theory of visual attention) was associated with higher amplitudes of the contralateral delay activity (CDA) and the central positivity (CP). In addition, rightward hemifield asymmetry of vSTM (Kλ) was associated with lower CDA amplitudes. Furthermore, more severe cognitive decline from young adulthood to late-middle age predicted higher CDA amplitudes, and the relationship between K and the CDA was less reliable in individuals who show higher levels of cognitive decline compared to individuals with preserved abilities. By contrast, there was no significant effect of lifespan cognitive changes on the CP or the relationship between behavioral measures of vSTM and the CP. Neither the CDA, nor the CP, nor the relationships between K or Kλ and the event-related potentials were predicted by individuals' current cognitive status. Together, our findings indicate complex age-related changes in processes underlying behavioral and EEG measures of vSTM and suggest that the K-CDA relationship might be a marker of cognitive lifespan trajectories. |
| Databáze: | OpenAIRE |
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