SynthesisBrain imaging and behavior2026
Impact of hypertension on brain function assessed by resting state functional MRI (rs-fMRI): a systematic review and meta-analysis.
Synthesis in Brain imaging and behavior, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
5 authors.
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Abstract
Hypertension is increasingly recognized as a contributor to cognitive decline and altered brain function, with resting-state functional magnetic resonance imaging (rs-fMRI) offering a non-invasive method to assess spontaneous brain activity and connectivity. This study systematically reviewed and quantitatively synthesized rs-fMRI findings in hypertensive individuals compared to normotensive controls, and within hypertensive subgroups (cognitively normal vs. impaired). A systematic search of PubMed, Scopus, Web of Science, and Cochrane Library (January 2014-March 2024) identified 15 studies for qualitative synthesis, with 11 eligible for meta-analysis using random-effects models. Heterogeneity was assessed with the I2 statistic and bias via the Newcastle-Ottawa Scale. Results showed a moderate pooled effect size of d = 0.64 (95% CI: 0.39-0.89, I2 = 22.9%) for brain functional alterations, with consistent involvement of frontal, temporal, precuneus, cerebellar, and default mode network-related regions across individual studies. With larger effects in hypertensive versus normotensive individuals (d = 0.74, I2 = 39.5%), a moderate effect in cognitively impaired versus normal hypertensives (d = 0.56, I2 = 0%, n = 3), and a large effect for seed-based functional connectivity (d = 0.93, I2 = 0%, n = 2). Sensitivity analysis excluding high-effect studies (n = 2) confirmed robustness (d = 0.57, I
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