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Jac Billington, John Wann; Cortical responses to congruent and incongruent stereo cues for objects on a collision path with the observer. Journal of Vision 2015;15(12):1386. doi: 10.1167/15.12.1386.
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© 2017 Association for Research in Vision and Ophthalmology.
It has been established that binocular motion and visual looming are two primary sources of information for judging object motion. These cues are normally congruent when viewing motion in natural scenes. We explored the cortical responses to visual collision events that were presented via stimuli that changed in size (looming) or stereo-depth (binocular motion), or both. In particular we examined the differences in cortical response when the looming and binocular cues were congruent or incongruent in the collision information they provided. A stereoscopic goggle system was used within the fMRI environment and allowed us to present looming and disparity cues in isolation, or in congruent and incongruent combinations. Following univariate analysis it was found that incongruent looming and binocular motion cues elicited additional activation in cortical areas known to process error and locate objects in spatio-topic coordinates. Visual regions which showed high predictor values using multivariate pattern analysis concurred with research which has highlighted areas V1 - V3 and V6 in disparity processing. Results are discussed in terms of visual, cognitive and motor responses to seeing incongruent cues.
Meeting abstract presented at VSS 2015
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