The bilateral left cerebrum parietal lobe inferior parietal lobule is a heteromodal association region located in the posterior parietal cortex, bordering the supramarginal and angular gyri and lying posterior to the postcentral gyrus. It integrates multimodal sensory information from visual, auditory, and somatosensory systems to support complex cognitive functions such as spatial attention, body schema, language processing (including aspects of reading, writing, and semantic processing), numerical cognition, and praxis. The inferior parietal lobule is also involved in theory of mind, imitation, and the integration of sensory input with motor planning, contributing to goal-directed behavior and tool use. Direct article: Inferior parietal lobule.
The bilateral inferior parietal lobule (IPL) of the left cerebrum, as defined in the Talairach 1 mm atlas, has been repeatedly implicated in genetic studies of cognitive, psychiatric, and neurodevelopmental traits. GWAS of cortical thickness and surface area (e.g., ENIGMA, UK Biobank) have identified common variants near genes involved in neurodevelopment and synaptic function—such as MIR137, MAPT, and loci in 3p26, 15q14, and 17q21—that influence IPL morphology, often overlapping with broader parietal lobe measures. Polygenic risk for schizophrenia, autism spectrum disorder, major depressive disorder, and attention-deficit/hyperactivity disorder has been associated with altered structure or activation of the inferior parietal cortex, consistent with imaging–genetics findings linking risk variants in genes like COMT, BDNF, and DISC1 to parietal-mediated working memory, attention, and language processes. GWAS of educational attainment, general cognitive ability, and reading-related traits have shown that individuals with higher polygenic scores for these cognitive phenotypes tend to exhibit structural and functional differences in the IPL, reflecting its role in language, numerical processing, and multimodal integration. Additionally, genetic risk for Alzheimer’s disease (e.g., APOE ε4 and other AD-associated loci) has been associated with atrophy and altered connectivity in the inferior parietal lobule, particularly in left-lateralized temporo-parietal regions crucial for memory and semantic processing, highlighting this area as a convergence zone where neurodegenerative, psychiatric, and cognitive genetic influences intersect.
Overview generated by GPT-4o (2026).
Region ID: 887
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
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