The transverse temporal gyri are part of the Temporal lobe and are located on the dorsal aspect of the temporal lobe. As the primary auditory cortex, they constitute part of the Auditory pathway[^1] [^2].
Function
The transverse temporal gyri constitute the primary auditory cortex. The right and left auditory cortices process auditory impulses differently. The left auditory cortex is more involved in the temporal resolution of rapidly occurring acoustic information, whereas the right primarily analyzes tone-frequency spectra and timbres. The meaningful integration of these sounds into familiar sound patterns or noises, music, words, and eventually sentences and the like occurs only in the secondary auditory cortex[^1].
Afferents
The auditory pathway is the most important afferent input to the auditory cortex. The auditory pathway fibers terminate here in a tonotopic arrangement, with low frequencies localized more anterolaterally and high frequencies more posteromedially.
Development
The Heschl gyrus appears on MRI at a gestational age of 24 to 25 weeks and thus develops in parallel with the functional activation of the auditory system[^3].
Imaging
The transverse temporal gyri can be visualized on MRI imaging.
