The bilateral Left Cerebellum.Anterior Lobe.Pyramis.Gray Matter refers to gray matter within the pyramis of the anterior lobe of the left cerebellar hemisphere, as delineated in the Talairach 1 mm Atlas. The cerebellar anterior lobe, including the pyramis, participates in the modulation and coordination of limb and trunk movements through its extensive connections with spinal, vestibular, and cerebral motor pathways. Neuronal circuits in this region contribute to fine-tuning motor execution, balance, and posture by integrating proprioceptive and other sensory inputs, and by adjusting ongoing motor commands. Lesions involving the anterior lobe and pyramis can be associated with gait ataxia and disturbances in stance and coordinated limb movements. There is no direct link for this specific subregion; see the related structure Cerebellum.
The bilateral left cerebellar anterior lobe pyramis gray matter (Talairach 1 mm, anterior vermis/pyramis region) has been implicated genetically mainly through imaging-genetics and large-scale GWAS of cerebellar volume and functional connectivity, rather than locus-specific studies. Common variants in genes influencing neurodevelopment and synaptic organization (notably polygenic sets rather than single loci) have been associated with interindividual differences in cerebellar macro- and microstructure, including anterior vermis regions, in UK Biobank–scale datasets, with enrichment for neurodevelopmental, cytoskeletal, and calcium signaling pathways. Several cerebellar-volume GWAS report overlapping polygenic architecture with psychiatric and neurodevelopmental disorders—particularly schizophrenia, bipolar disorder, major depression, autism spectrum disorder, and ADHD—suggesting that genetic risk for these conditions partly acts via cerebellar circuits that include the anterior vermis/pyramis. Structural and functional abnormalities of the anterior vermis have also been observed in alcohol use disorder, mood disorders, and anxiety disorders, with twin and family studies indicating substantial heritability of cerebellar morphology; however, specific risk variants pinned uniquely to the pyramis are not yet well-resolved. Overall, current evidence supports a highly polygenic, pleiotropic genetic architecture in which variants that influence brain-wide development, cortical–cerebellar connectivity, and psychiatric risk contribute to variation in the left anterior cerebellar pyramis gray matter, rather than a small set of region-exclusive genes.
Overview generated by GPT-4o (2026).
Region ID: 116
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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