The bilateral Right Cerebrum.Sub-lobar.Thalamus.Gray Matter.Ventral Anterior Nucleus corresponds to the ventral anterior (VA) nucleus of the thalamus, a gray-matter relay structure located in the subcortical diencephalon that plays a key role in motor control and higher-order cortico-basal ganglia–thalamo-cortical loops. The VA nucleus receives major input from the globus pallidus and substantia nigra and projects predominantly to premotor and supplementary motor cortical areas, thereby influencing movement planning, initiation, and the selection of motor programs. It is also implicated in aspects of cognitive and affective processing through its connections with prefrontal regions, and is often targeted or considered in studies of movement disorders such as Parkinson’s disease, dystonia, and tremor. There is no direct link for this specific nucleus; a related structure is the Thalamus.
The ventral anterior nucleus of the thalamus, a sub-lobar gray matter structure within the right cerebrum as defined in the Talairach 1 mm Atlas, has been implicated in several genetic and genome-wide association studies (GWAS) primarily through imaging-genetics analyses of thalamic volume and connectivity rather than nucleus-specific GWAS. Large ENIGMA and UK Biobank–based studies have identified multiple loci influencing overall and regional thalamic volumes, including variants in or near genes such as NPTN, MAPT, GMNC, SMOC2, and others that contribute to subcortical morphology, with some effects seen in anterior thalamic regions comprising or bordering the ventral anterior nucleus. Genetic variants associated with psychiatric disorders that involve fronto-thalamic circuitry—such as schizophrenia (e.g., common risk loci in calcium channel and synaptic genes), bipolar disorder, and major depressive disorder—have been linked to altered thalamic structure and thalamo-prefrontal connectivity on MRI, implicating anterior and mediodorsal thalamic nuclei in particular. Additional work has shown that polygenic risk scores for schizophrenia, autism spectrum disorder, attention-deficit/hyperactivity disorder, and major depression relate to thalamic volume or functional connectivity changes, again often in anterior thalamic regions involved in cognitive and affective control. Variants in HLA and immune-related loci, as well as genes influencing neurodevelopmental pathways (e.g., synaptic plasticity, axon guidance, and neurotrophic signaling), have been associated with thalamic alterations in multiple sclerosis, epilepsy, and neurodegenerative disorders, though these findings typically reference whole thalamus or broad anterior nuclei rather than isolating the ventral anterior nucleus. Overall, current genetic evidence links common and rare variants affecting neurodevelopment, synaptic function, and immune processes to macrostructural and functional differences in the thalamus that encompass the ventral anterior nucleus, but precise, nucleus-specific GWAS associations for this region remain sparse and are generally inferred from studies of anterior thalamic subdivisions and fronto-thalamic circuit–related disorders.
Overview generated by GPT-4o (2026).
Region ID: 647
Hemisphere: bilateral
Atlas: Talairach labels 1mm
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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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