(Thesis (M.S.)-Bogazici University. Institute of Biomedical Engineering, 2006., 2006.) Hamamcı, Andaç.; Öztürk, Cengizhan.
The aim of this study is to investigate the effects of the repetitive stimuluson the retinotopic functional magnetic resonance imaging results obtained. Screenprojectorsystem is constructed to show visual stimulus to subjects during fMRI scans. Retinotopic stimulus are applied to 5 healty subjects, everyday during 3 weeks. fMRIscans of subjects are done one at the begining and once after each week. The dataacquired is analysed to obtain the retinotopic fMRI parameters. Visual areas, BOLDsignal changes and cortical magnif cation in primary visual cortex are determined for each week. The results obtained are quite stable. Observed changes are discussedwhich might be investigated in further studies.|Keywords: Visual Cortex, fMRI, retinotopy, adaptation.