Seeing in reverse

Article Abstract:

Recent research has increased our understanding of binocular vision. This is the process by which we perceive a three-dimensional view of the world due to similar images falling on different retinal areas and the binocular cells in the primary visual cortex of the brain detecting disparity in the signals received. B.G. Cumming and A.J. Parker have discovered that binocular cells give inverted disparity signals in response to reversed-contrast images and that these are not used for depth perception. G.S. Mason and colleagues found that short-latency vergence and depth perception can be dissociated.

Evaluation, Vision research, Depth perception, Binocular vision

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Seeing motion behind occluders

Article Abstract:

A combination of informations in a network of low-level motion detectors allows the identification of the trajectory of an object, independent of the segmentation process. In a random dot analysis, the identification of a dot proceeding in a specific path among similar dots during brownian motion is improved by eclipsing the breaks in the pathway with occluders. Better vision can be realized if the occluders are not allowed to move in the direction of the trajectory.

Analysis, Usage, Observations, Brownian motion, Motion detectors, Motion perception (Vision), Motion perception

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Seeing where your hands are

Article Abstract:

Extinction is the phenomenon whereby some brain damaged patients cannot identify a sensory stimulus on the opposite side to the lesion. This extinction phenomenon was tested using various stimulus experiments, with varying results. This is explained by the fact that some neurons have tactile receptive fields with corresponding visual receptive fields, confirming the hypothesis that near space is coded in body part centered coordinates.

Physiological aspects, Brain damage, Extinction (Psychology)

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