The bilateral Left Cerebrum Parietal Lobe Inferior Parietal Lobule white matter comprises the subcortical myelinated fiber tracts underlying the inferior parietal lobule, which includes the supramarginal and angular gyri. This white matter region contains association fibers interconnecting parietal, temporal, and frontal cortices, including components of major pathways such as the superior longitudinal fasciculus and arcuate fasciculus, supporting multimodal integration of somatosensory, visual, and auditory information. Functionally, it contributes to language processing, spatial attention, praxis, and higher-order cognitive operations such as numerical and symbolic reasoning, by mediating communication between inferior parietal cortex and distributed cortical networks. There is no direct Wikipedia article for this specific white matter subdivision; see the related structure Inferior parietal lobule.
The bilateral left inferior parietal lobule white matter, as defined in the Talairach 1 mm atlas, has been implicated indirectly in genetic studies through its role in large-scale association networks rather than via region-specific GWAS hits, with findings typically reported at the level of cortical thickness, surface area, or diffusion MRI metrics rather than exact Talairach parcels. GWAS of brain structure have shown that measures encompassing inferior parietal lobule and adjacent white matter are heritable and influenced by variants in genes involved in neurodevelopment, synaptic function, and axon guidance (e.g., loci near HMGA2, MEF2C, and genes in Wnt and MAPK pathways), and that these structural phenotypes share genetic correlations with cognitive performance, educational attainment, and general intelligence. Polygenic risk for Alzheimer’s disease, schizophrenia, and major depression has been associated with altered parietal white matter integrity and parietal cortical thickness in imaging genetics studies, suggesting shared genetic architecture between these disorders and structural variation in this region, although specific risk variants are not uniquely localized to the inferior parietal lobule white matter. Additionally, GWAS of reading ability, language-related traits, and attentional control have reported associations with parietal structural and functional measures, consistent with the inferior parietal lobule’s role in language, number processing, and multimodal integration, but these links arise from distributed networks and do not establish a distinct, well-characterized set of genetic associations exclusive to the bilateral left inferior parietal lobule white matter as labeled in the Talairach atlas.
Overview generated by GPT-4o (2026).
Region ID: 879
Hemisphere: bilateral
Atlas: Talairach labels 1mm
Full Quality Version: Download MP4
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
This resource is licensed under CC0 1.0 Universal (Public Domain).