The right anterior insula is the rostral portion of the insular cortex located deep within the lateral sulcus on the right hemisphere, anterior to the central insular sulcus. Cytoarchitectonically, it is characterized by agranular to dysgranular cortex and distinct connectivity with frontal, limbic, and temporal regions, including the anterior cingulate cortex, orbitofrontal cortex, and amygdala. Functionally, the right anterior insula is a key hub of the salience network, integrating interoceptive, emotional, and cognitive information to support subjective awareness of bodily states, emotional processing, risk and uncertainty evaluation, and switching between default mode and executive control networks. It is implicated in affective processing, autonomic regulation, and disorders such as anxiety, depression, addiction, and certain pain syndromes. There is no direct Wikipedia article for the “right anterior insula” as a standalone entry; a closely related and encompassing structure is the Insular cortex.
Genetic associations with the right anterior insula in the brainCOLOR atlas largely emerge from imaging genetics and GWAS of cortical structure and function, as well as disorder-focused studies implicating this salience-network hub. Large-scale brain MRI GWAS (e.g., ENIGMA, UK Biobank–based consortia) have linked variation in insular thickness and surface area to loci near genes involved in neurodevelopment, synaptic function, and axon guidance, including but not limited to variants in genes such as MAPT, TBR1, and several glutamatergic and GABAergic pathway genes, although many signals are shared across bilateral or global insular measures rather than being specific to the right anterior subregion. Polygenic risk scores for major depressive disorder, schizophrenia, bipolar disorder, and autism spectrum disorder show associations with altered insular morphology or connectivity, and insular structural or functional abnormalities mediate genetic risk effects on traits like negative affect, emotion regulation, and interoceptive sensitivity. GWAS of risk-taking, smoking, alcohol use, and pain sensitivity have also reported overlapping loci whose genetic effects are partly expressed in the anterior insula, as suggested by transcriptomic enrichment and imaging–genetics mediation analyses, though effect sizes are modest and region-level specificity remains limited. Overall, genetic influences on the right anterior insula appear highly polygenic and pleiotropic, interfacing with broader salience, limbic, and fronto-parietal networks rather than reflecting insula-specific risk genes.
Overview generated by GPT-4o (2026).
Region ID: 26
Hemisphere: Right
Atlas: brainCOLOR
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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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