FMRI study of parallax under topic driven stimuli
Ellison, Andrew Jeffrey
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Little is known regarding the brain regions responsible for the perception of 3 dimensional (3D) versus 2 dimensional (2D) images. Thus, functional magnetic resonance imaging (fMRI) was used to determine activation patterns in the human brain under stereoscopic or monoscopic stimuli (e.g. 3D or 2D). To examine whether these regions differ as a function of subject matter, stimuli were separated based on the image themes: locations, objects, and plants and animals. A block design was used to collect data from subjects who were asked to view images in 2 and 3 dimensions in 6 runs. The goal of this study was to determine whether the activation pattern using passive 3D viewing is similar to what has been previously demonstrated using other 3D viewing techniques. A secondary aim was to determine if the stimulus thematic content altered the brain regions involved. The results revealed that in addition to lateral occipital complex (LOC), which has been previously discussed in literature, the supramarginal gyrus and parietal operculum cortex are involved in 3D image perception.