The Right Precuneus is a medial parietal lobe structure located on the medial surface of the right hemisphere, bounded anteriorly by the marginal ramus of the cingulate sulcus and posteriorly by the parieto-occipital sulcus. It is a key hub of the default mode network, contributing to self-referential processing, visuo-spatial imagery, episodic memory retrieval, and aspects of consciousness and internal mentation. Functionally, it integrates multimodal sensory information with higher-order cognitive operations, supporting tasks such as mental rotation, navigation, and perspective taking, and shows strong intrinsic connectivity with posterior cingulate, medial prefrontal, and lateral parietal cortices. The Right Precuneus exhibits hemispheric specialization patterns that may differ from the left side in attention and spatial processing. Related article: Precuneus.
The right precuneus, as defined in the brainCOLOR Atlas, has been implicated in a range of genetic associations through imaging genetics and GWAS, though most findings derive from broader cortical thickness/volume or connectivity measures rather than this parcel alone. Common variants in genes related to synaptic function and neurodevelopment (notably APOE, CLU, PICALM, and CR1 in Alzheimer’s disease GWAS) show associations with structural and functional alterations in the precuneus, consistent with its role as an early and metabolically vulnerable hub in Alzheimer’s pathology. Polygenic risk scores for schizophrenia, major depressive disorder, and bipolar disorder have been associated with altered precuneus structure or functional connectivity within the default mode network, linking this region to psychopathology and self-referential processing. Large-scale brain MRI GWAS (e.g., ENIGMA, UK Biobank–based studies) report SNP-level associations for nearby or overlapping cortical regions involving genes enriched for neuronal differentiation, myelination, and synaptic signaling, although locus-level signals are typically shared across adjacent parietal and midline areas rather than being specific to the right precuneus parcel. Additionally, genetic liability for cognitive traits (intelligence, educational attainment) and personality dimensions (e.g., neuroticism) has been associated with individual differences in precuneus morphology and connectivity, reinforcing its genetically influenced role in higher-order cognition and introspective processes.
Overview generated by GPT-4o (2026).
Region ID: 84
Hemisphere: Right
Atlas: brainCOLOR
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Full Quality Version: Download MP4
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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