Human Brain's Transverse Temporal Gyri In Side View

Description

Heschl’s transverse temporal gyri (gyri temporales transversi) occupy the superior surface of the temporal lobe, tucked deep to the lips of the lateral sulcus (Sylvian fissure) on the temporal plane. From a fixed lateral side view of the human brain, the superior temporal gyrus forms the lateral wall of the fissure while the transverse ridges of Heschl’s gyri appear on the superior surface within the sulcus, oriented roughly mediolaterally and lying anterior to the planum temporale. The relationship to the temporal operculum is immediate, with the insular region medial to the sulcal depth and the frontal and parietal opercula forming the superior margin of the cleft. Subtle asymmetry is expected. One gyrus may be duplicated. Heschl’s gyrus is the cortical home of primary auditory cortex (A1; Brodmann areas 41 and 42), so its location inside the lateral sulcus matters whenever you discuss hearing pathways beyond the medial geniculate body, cortical tonotopy, or hemispheric specialization for speech and music. Lesions from middle cerebral artery territory infarction, low-grade glioma, or focal cortical dysplasia in this region can produce central auditory deficits or auditory hallucinations, and temporal lobe epilepsy workups often reference the superior temporal plane when correlating semiology with structural MRI and intracranial EEG targets. Deep position makes orientation tricky. This lateral perspective helps. Use this illustration in neuroanatomy and neuroscience teaching to anchor the transverse temporal gyrus relative to the lateral sulcus, superior temporal gyrus, and planum temporale, and in audiology or otology texts that need a cortical endpoint for the auditory pathway. It also fits neurosurgical and neuroradiology publications discussing the Sylvian fissure corridor, opercular retraction risk, and cortical mapping near auditory cortex. Anatomical accuracy verified by SciePro's Medical Advisory Board.