The bilateral Right Cerebrum.Sub-lobar.Thalamus.Gray Matter.Ventral Posterior Medial Nucleus corresponds to the ventral posteromedial (VPM) nucleus of the thalamus, a key relay structure within the posterior thalamus that processes somatosensory information from the face and oral cavity. This nucleus receives primary afferents via the trigeminothalamic pathways and taste-related inputs via the solitary tract, integrating tactile, pain, temperature, and gustatory signals before projecting mainly to the primary somatosensory cortex (face area) and related cortical regions. Functionally, the VPM is essential for conscious perception and fine discrimination of facial somatosensation and taste, contributing to oral stereognosis and flavor perception. Lesions in this region can lead to contralateral facial sensory deficits or dysesthesias and may disturb taste perception. There is no direct Wikipedia article for the specific VPM nucleus; a closely related and encompassing structure is the Thalamus.
The bilateral ventral posterior medial nucleus of the thalamus, a somatosensory relay region implicated in pain and tactile processing, has been indirectly associated with several genetic findings from neuroimaging and disorder-focused GWAS, although most studies target the thalamus as a whole or larger subregions rather than this specific nucleus as defined in the Talairach 2 mm atlas. Large-scale brain-structure GWAS (e.g., ENIGMA and UK Biobank studies) have identified variants near genes such as GMNC, DLG2, and multiple loci in the major histocompatibility complex (MHC) region that influence thalamic volume and microstructure, with downstream effects that may differentially impact ventral posterior nuclei. Genetic studies of chronic pain, migraine, and somatosensory traits (including loci in CACNA1A, TRPM8, and SCN9A) repeatedly highlight thalamic involvement in pain circuitry, and functional imaging often shows altered activity in the ventral posterior medial nucleus in carriers of high-risk alleles, though these are typically functional rather than structural GWAS links. Psychiatric and neurodevelopmental disorder GWAS (notably for schizophrenia, bipolar disorder, major depression, and autism) have identified risk variants in synaptic and neurodevelopmental genes (e.g., CACNA1C, GRIN2A, C4A) that, through imaging-genetics analyses, are associated with thalamic dysconnectivity and abnormal thalamo-cortical signaling, which may include sensory relay nuclei such as the ventral posterior medial nucleus. In summary, genetic associations for this specific Talairach-defined nucleus are largely inferred from broader thalamic and pain-related imaging-genetics work rather than from nucleus-specific GWAS, but converging evidence from structural, functional, and disorder-based genetic studies supports a role for thalamic sensory relay regions in mediating the effects of multiple neuropsychiatric and pain-related risk loci.
Overview generated by GPT-4o (2026).
Region ID: 583
Hemisphere: bilateral
Atlas: Talairach labels 2mm
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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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