The bilateral Right Cerebrum.Frontal Lobe.Sub-Gyral.White Matter.Corpus Callosum region corresponds to deep frontal lobe white matter traversed by interhemispheric fibers of the corpus callosum, particularly those connecting homologous frontal cortical areas. This sub-gyral compartment contains heavily myelinated axonal bundles that mediate high-speed communication between right and left frontal association cortices, supporting integration of executive functions, motor planning, working memory, and higher-order cognitive control. It includes portions of callosal segments that project to dorsolateral, medial, and orbitofrontal regions, and is supplied by perforating branches of the anterior and middle cerebral arteries. Damage or disconnection in this area can lead to disconnection syndromes affecting bimanual coordination, frontal executive processes, and interhemispheric transfer of complex information. Corpus callosum
The bilateral right frontal sub-gyral white matter and adjacent corpus callosum, as defined by the Talairach 1 mm atlas, overlaps with frontal deep white matter tracts and interhemispheric callosal fibers that have been repeatedly implicated in imaging–genetics and GWAS studies of brain structure, cognition, and psychiatric disease. Large-scale ENIGMA and UK Biobank GWAS have identified common variants in genes involved in myelination and axon guidance (for example, and not exhaustively, variants near or within genes such as NTRK1/2, CNTN4, MAG, and others) that influence frontal white matter volume, fractional anisotropy, and callosal microstructure, with many loci showing pleiotropy across multiple white matter tracts rather than specificity for this exact Talairach-defined region. Altered integrity of frontal white matter and the corpus callosum, partly under genetic control, has been associated with schizophrenia, bipolar disorder, major depressive disorder, ADHD, and autism spectrum disorder, where polygenic risk scores correlate with reduced callosal or frontal white matter measures, as well as with neurodegenerative and small-vessel disease traits including Alzheimer’s disease, cerebral white matter hyperintensities, and stroke-related leukoaraiosis. Genetic influences on frontal and callosal white matter also overlap with loci associated with general cognitive ability, educational attainment, and processing speed, reflecting the role of these tracts in large-scale cortical networks; however, current evidence indicates that genetic effects are distributed and shared across multiple white matter regions, and no single variant is uniquely tied to this specific bilateral right frontal sub-gyral white matter/corpus callosum label.
Overview generated by GPT-4o (2026).
Region ID: 515
Hemisphere: bilateral
Atlas: Talairach labels 1mm
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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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