Correspondences between retinotopic areas and myelin maps in human visual cortex.
Bottom Line: The best results were obtained using a recently developed multimodal surface matching method.These results indicate that architectonic and retinotopic areal boundaries are in agreement in some regions, and that retinotopy provides a finer-grained parcellation in other regions.The atlas datasets from this analysis are freely available as a resource for other studies that will benefit from retinotopic and myelin density map landmarks in human visual cortex.
Affiliation: Laboratorium voor Neuro-en Psychofysiologie, KU Leuven, Leuven, Belgium.Show MeSH
Related in: MedlinePlus
Mentions: The probabilistic area map (PAM) of a given area reflects the degree of consistency in size, shape and location across subjects after registration to an atlas by a particular method. As shown in Fig. 3 for three exemplar areas (V1, MT, and pFST) the distribution of the PAM on the surface represents a two-dimensional step function with a central maximum or plateau surrounded by a progressive step-wise decline whose steepness depends on the residual variation in size, shape, and location of the area (Fig. 3, leftmost column for FreeSurfer registration and third column for MSM-retino registration). These PAMs were further characterized using the contours for maximum probability, 50% probability, and the minimum probability threshold (8%), which corresponds to the maximum possible extent of the PAM. These contours are shown in the second and fourth columns of Fig. 3 in increasingly dark shades of blue (V1, top row), orange (MT, middle row) and green (pFST, bottom row).
Affiliation: Laboratorium voor Neuro-en Psychofysiologie, KU Leuven, Leuven, Belgium.