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• W1973621705 abstract "Previous studies have supported the concept that the default network is an intrinsic brain system that participates in internal modes of cognition. Neural activity and connectivity within the default network, which are correlated with cognitive ability even at rest, may be plausible intermediate phenotypes that will enable us to understand the genetic mechanisms of individuals' cognitive function or the risk for genetic brain diseases. Using resting functional magnetic resonance imaging and imaging genetic paradigms, we investigated whether individual default network connectivity was modulated by COMT val(158)met in 57 healthy young subjects. Compared with COMT heterozygous individuals, homozygous val individuals showed significantly decreased prefrontal-related connectivities, which primarily occurred between prefrontal regions and the posterior cingulate/restrosplenial cortices. Further analyses of the topological characteristics of the default network showed homozygous val individuals had significantly fewer node degrees in the prefrontal regions. This finding may partially elucidate previous reports that the COMT val variant is associated with inefficient prefrontal information processing and poor cognitive performance. Our findings suggest that default network connectivity that involves the prefrontal cortex is modulated by COMT val(158)met through differential effects on prefrontal dopamine levels." @default.
• W1973621705 created "2016-06-24" @default.
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• W1973621705 date "2010-01-06" @default.
• W1973621705 modified "2023-10-13" @default.
• W1973621705 title "Prefrontal-Related Functional Connectivities within the Default Network Are Modulated by COMT<i>val¹⁵⁸met</i>in Healthy Young Adults" @default.
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• W1973621705 doi "https://doi.org/10.1523/jneurosci.3941-09.2010" @default.
• W1973621705 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6632535" @default.
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