Cognitive reserve and cognitive performance of patients with focal frontal lesions

MacPherson, Sarah E, Healy, Colm, Allerhand, Michael, Spanò, Barbara, Tudor-Sfetea, Carina, White, Mark, Smirni, Daniela, Shallice, Tim, Chan, Edgar, Bozzali, Marco and Cipolotti, Lisa (2016) Cognitive reserve and cognitive performance of patients with focal frontal lesions. Neuropsychologia, 96. pp. 19-28. ISSN 1873-3514

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The Cognitive reserve (CR) hypothesis was put forward to account for the variability in cognitive performance of patients with similar degrees of brain pathology. Compensatory neural activity within the frontal lobes has often been associated with CR. For the first time we investigated the independent effects of two CR proxies, education and NART IQ, on measures of executive function, fluid intelligence, speed of information processing, verbal short term memory (vSTM), naming, and perception in a sample of 86 patients with focal, unilateral frontal lesions and 142 healthy controls. We fitted multiple linear regression models for each of the cognitive measures and found that only NART IQ predicted executive and naming performance. Neither education nor NART IQ predicted performance on fluid intelligence, processing speed, vSTM or perceptual abilities. Education and NART IQ did not modify the effect of lesion severity on cognitive impairment. We also found that age significantly predicted performance on executive tests and the majority of our other cognitive measures, except vSTM and GNT. Age was the only predictor for fluid intelligence. This latter finding suggests that age plays a role in executive performance over and above the contribution of CR proxies in patients with focal frontal lesions. Overall, our results suggest that the CR proxies do not appear to modify the relationship between cognitive impairment and frontal lesions.

Item Type: Article
Keywords: Age; Cognitive performance; Cognitive reserve; Education; Frontal lesions; Literacy attainment
Schools and Departments: Brighton and Sussex Medical School > Neuroscience
Subjects: R Medicine > RC Internal medicine > RC0321 Neurosciences. Biological psychiatry. Neuropsychiatry > RC0346 Neurology. Diseases of the nervous system Including speech disorders
Depositing User: Patricia Butler
Date Deposited: 06 Dec 2019 13:39
Last Modified: 06 Dec 2019 13:45

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