A method to infer the retinotopy with landmark-based cortical surface co-registration

摘要

FMRI studies of the visual system often rely on retinotopy to define the low-level visual areas (V1, V2, V3, hV4) and to establish a correspondence between voxels in these areas and points in the visual space. However, retinotopic mapping is impossible for blind subjects, subjects who cannot fixate, or those with severely compromised visual fields. Here, we evaluate a method for inferring the retinotopy from normally-sighted subjects using a landmark-based cortical surface coregistration technique (Pantazis et al., 2010). This technique relies on manually identified sulcal fundi to constrain the coregistration progress.