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Updated: Jul 16, 2026

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
Published on: December 8, 2023
Foveal versus parafoveal scanpaths of visual imagery in virtual hemianopic subjects
Wolfgang H Zangemeister1, Thomas Liman
1Department of Neurology, Clinical Neuroscience Unit, University Hamburg, Germany. WHIZ@uke.uni-hamburg.de
Abstract:
Sophisticated string analysis [compressed regional string analysis, cRSE] shows significant differences following therapeutical masking of the foveal region during a virtual hemianopia. The visual imagery scanpath is done over a compressed mental image that needs longer fixation duration but fewer saccades than the real image. Combination of different viewing tasks with types of pictures permits to show how scanpath top-down strategies can be enforced or decreased by proper combination of task and picture; this is influenced by the mask of fovea versus no-mask of fovea difference, with bottom up mechanisms becoming more important with loss of foveal viewing strategies in the mask condition.
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