The bilateral Right Cerebrum.Frontal Lobe.Sub-Gyral.White Matter corresponds to deep frontal lobe white matter beneath the cortical gyri on the right side of the cerebrum, as defined in the Talairach 2mm Atlas. This region consists predominantly of myelinated axonal tracts that interconnect frontal cortical areas with each other (short association fibers) and with more distant cortical and subcortical structures (long association fibers and projection fibers). Functionally, these white matter pathways support frontal lobe roles in executive functions, working memory, decision-making, motor planning, and aspects of social and emotional regulation by enabling efficient communication within the frontal cortex and between frontal regions and networks involving the parietal, temporal, and limbic areas. There is no direct Wikipedia article for this specific sub-gyral white matter label; a closely related structure is the Frontal lobe.
The bilateral right frontal sub-gyral white matter (as defined in the Talairach 2 mm atlas) has been implicated indirectly in genetic studies through its role in large-scale frontal circuits rather than via region-specific gene associations, with most evidence coming from imaging genetics and GWAS of brain structure and connectivity. Variants in genes involved in myelination and axonal integrity (e.g., MAG, MBP, PLP1, CNTN4/6, LINGO1) and oligodendrocyte function, as well as neurodevelopmental genes such as NRG1, DISC1, CNTNAP2, and CACNA1C, have shown associations with frontal white matter volume, microstructure (e.g., fractional anisotropy), or connectivity measures that encompass this area. GWAS of global and regional white matter and total frontal lobe volume (e.g., ENIGMA and UK Biobank consortia) consistently highlight polygenic contributions involving pathways for axon guidance, synaptic development, and immune/inflammatory regulation, some of which overlap with loci implicated in schizophrenia, bipolar disorder, major depression, ADHD, autism spectrum disorders, and cognitive traits such as intelligence and executive function. Diffusion MRI GWAS of specific tracts that traverse right frontal sub-gyral white matter (such as portions of the superior longitudinal fasciculus and anterior corona radiata) have linked common variants in genes related to cytoskeletal dynamics, cell adhesion, and extracellular matrix to tract microstructure, which in turn correlate with risk or symptom dimensions in mood and psychotic disorders, impulsivity, and working memory performance. Overall, genetic findings point to a diffuse, highly polygenic architecture in which many neurodevelopmental and myelin-related genes exert small effects on frontal white matter characteristics that include, but are not exclusive to, the bilateral right sub-gyral region, rather than any single gene or variant being uniquely tied to this specific Talairach-defined area.
Overview generated by GPT-4o (2026).
Region ID: 194
Hemisphere: bilateral
Atlas: Talairach labels 2mm
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Full Quality Version: Download MP4
Wali Sidiqyar*, Gaurav Rudravaram*, Elyssa M. McMaster, Trent M. Schwartz, Adam M. Saunders, Kurt G. Schilling, Bennett A. Landman "Introducing SPINS: A Shared Public Visualization Library of Neuroanatomical Structures." Medical Imaging with Deep Learning- short paper
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