Medial temporal lobe atrophy, white matter hyperintensities and cognitive impairment among Nigerian African stroke survivors View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2015-12

AUTHORS

Rufus O. Akinyemi, Michael Firbank, Godwin I. Ogbole, Louise M. Allan, Mayowa O. Owolabi, Joshua O. Akinyemi, Bolutife P. Yusuf, Oluremi Ogunseyinde, Adesola Ogunniyi, Raj N. Kalaria

ABSTRACT

BACKGROUND: Neuroimaging features associated with vascular cognitive impairment have not been examined in sub-Saharan Africans. We determined magnetic resonance imaging (MRI) features associated with cognitive impairment in a sample of Nigerian stroke survivors. METHODS: Stroke survivors underwent brain MRI with standardized assessment of brain volumes and visual rating of medial temporal lobe atrophy (MTA), and white matter hyperintensities (WMH) at 3 months post-stroke. Demographic, clinical and psychometric assessments of global cognitive function, executive function, mental speed and memory were related to changes in structural MRI. RESULTS: In our pilot sample of 58 stroke survivors (60.1 ± 10.7 years old) MTA correlated significantly with age (r = 0.525), WMH (r = 0.461), memory (r = -0.702), executive function (r = -0.369) and general cognitive performance (r = -0.378). On univariate analysis, age >60 years (p = 0.016), low educational attainment (p < 0.001 to p < 0.003), total brain volume (p < 0.024 and p < 0.025) and MTA (p < 0.003 to p < 0.007) but not total WMH (p < 0.073, p = 0.610) were associated with cognitive outcome. In a two-step multivariate regression analysis, MTA (p < 0.035 and p < 0.016) and low educational attainment (p < 0.012 and p < 0.019) were sustained as independent statistical predictors of cognitive outcome. CONCLUSIONS: Medial temporal lobe atrophy was a significant neuroimaging predictor of early post-stroke cognitive dysfunction in the Nigerian African stroke survivors. These observations have implications for a vascular basis of MTA in older stroke survivors among sub-Saharan Africans. More... »

PAGES

625

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s13104-015-1552-7

DOI

http://dx.doi.org/10.1186/s13104-015-1552-7

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1001568820

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/26519155


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