The Right transverse-temporal-gyrus, also known as the right Heschl’s gyrus, is a primary auditory cortical region located on the superior surface of the temporal lobe, buried within the lateral (Sylvian) fissure. It corresponds largely to Brodmann areas 41 and 42 and serves as the initial cortical recipient of auditory input from the medial geniculate nucleus of the thalamus. This region is tonotopically organized, with neurons arranged according to sound frequency, and plays a critical role in basic auditory processing, including the detection and discrimination of pitch, loudness, and temporal features of sound. Lateralization effects are often observed, with the right transverse-temporal gyrus particularly implicated in processing spectral and melodic aspects of complex sounds, such as music and prosody, while interacting with adjacent superior temporal and frontal regions for higher-order auditory perception and integration. There is no direct Wikipedia article for the “transverse temporal gyrus,” but it is commonly referred to as Heschl’s gyrus.
The right transverse temporal gyrus (Heschl’s gyrus) as defined in the brainCOLOR atlas corresponds to primary auditory cortex, and genetic associations for this region largely derive from imaging–genetics and GWAS of cortical thickness, surface area, and morphology rather than region-specific candidate-gene studies. Large consortia such as ENIGMA and UK Biobank–based GWAS have identified multiple loci influencing auditory cortex and superior temporal regions, with common variants near genes involved in neurodevelopment, synaptic function, and cortical patterning (for example, MIR924HG, MET, and loci near FOXP2 and DCDC2 in broader auditory/speech networks), although precise, consistently replicated SNPs uniquely tied to the right transverse temporal gyrus remain limited. Polygenic influences linked to general cognitive ability, educational attainment, and intracranial volume show correlations with structural measures in auditory and superior temporal cortex, suggesting shared genetic architecture between auditory cortical morphology and higher-order cognitive traits. Moreover, genetic risk for neuropsychiatric disorders—particularly schizophrenia, bipolar disorder, and autism spectrum disorder—has been associated with altered cortical thickness or gyrification in Heschl’s gyrus and adjacent superior temporal regions, implying that disorder-related variants may exert part of their effect through this auditory hub. In addition, GWAS and family studies of specific traits such as musical aptitude, language and speech processing, and tinnitus have implicated genes and polygenic scores that covary with structural or functional variation in primary auditory cortex, though these associations often involve bilateral or network-level auditory regions and are not exclusive to the right hemisphere transverse temporal gyrus. Overall, current genetic evidence supports a polygenic and pleiotropic contribution to right transverse temporal gyrus structure and function, embedded in broader temporal and auditory network genetics rather than driven by single, region-specific loci.
Overview generated by GPT-4o (2026).
Region ID: 120
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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