Heschl and Superior Temporal Gyri: Low Signal Intensity of the Cortex on T2-weighted MR Images of the Normal Brain

Abstract

These findings demonstrate lower signal intensity of the cortex on T2-weighted images in the first HG and surrounding STG compared with that of the MTG.

Inverse T2 contrast at 1.5 Tesla between gray matter and white matter in the occipital lobe of normal adult human brain

“…Among these may be regional variations in brain iron concentration, as well as variations in the microarchitecture of the cellular constituents and myelin structure (cytoarchitecture and myeloarchitecture, respectively). Recently, investigators examining the superior temporal gyrus and primary auditory cortex region have shown that the T 2 -weighted signal intensities can vary appreciably even between neighboring regions of the cortex (11). We found a similar pattern in our studies of the visual cortex, where typically an oblique slice through the calcarine fissure is studied.…”

“…As such, it is useful to accurately map T 2 of various normal and abnormal tissues. Several studies (2)(3)(4)(5)(6)(7)(8)(9)(10)(11) have shown that T 2 varies across brain regions and during different stages of brain maturation and aging (5,10). Numerous studies in normal adults at multiple field strengths (2)(3)(4)9) have concluded that T 2 of cortical gray matter (GM) is longer than that of white matter (WM).…”

Multimodal image analysis of clinical influences on preterm brain development

“…Another set of multimodal imaging markers corresponded largely to sex, with male sex associated with volumetric increases in the temporal lobes, medial parietal regions and cerebellum, and increased FA in the internal capsule; and, when corrected for ICV, increased T2 signal intensity primarily in the primary visual cortex. Cortical T2 signal intensity is dependent on numerous developmental processes, including cellular packing and myelination,33 and a lower gray matter T2 signal at this stage of development is indicative of more‐advanced maturation 34. This indicates a sexual dimorphism in cortical maturation, which may also be related to differences in cortical surface area over the same time period 9…”

Early Maturation of the Linguistic Dorsal Pathway in Human Infants

“…In adults, Sigalovsky et al (2006) using the longitudinal relaxation time (R1) and Yoshiura et al (2000) using T2 images observed subtle signal differences between Heschl's gyrus and other superior temporal regions related to a higher myelin content and cell density in the auditory koniocortex. The well known heterogeneous darkening of T2 images along the first year of life and the decrease of the difference between the STS and the frontal areas noted here during the studied time period (see also Fig.…”