Redundancy reduction explains the expansion of visual direction space around the cardinal axes
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| Title: | Redundancy reduction explains the expansion of visual direction space around the cardinal axes |
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| Authors: | John A. Perrone, Dorion B. Liston |
| Source: | Vision Research. 111:31-42 |
| Publisher Information: | Elsevier BV, 2015. |
| Publication Year: | 2015 |
| Subject Terms: | Models, Neurological, 05 social sciences, Motion Perception, Oblique effect, MSTd, Surround inhibition, Sensory Systems, Pursuit, Smooth, Ophthalmology, Inhibition, Psychological, 03 medical and health sciences, Discrimination, Psychological, 0302 clinical medicine, Redundancy reduction, MT, Space Perception, Humans, Visual Pathways, 0501 psychology and cognitive sciences, 10. No inequality, Visual motion, Visual Cortex |
| Description: | Motion direction discrimination in humans is worse for oblique directions than for the cardinal directions (the oblique effect). For some unknown reason, the human visual system makes systematic errors in the estimation of particular motion directions; a direction displacement near a cardinal axis appears larger than it really is whereas the same displacement near an oblique axis appears to be smaller. Although the perceptual effects are robust and are clearly measurable in smooth pursuit eye movements, all attempts to identify the neural underpinnings for the oblique effect have failed. Here we show that a model of image velocity estimation based on the known properties of neurons in primary visual cortex (V1) and the middle temporal (MT) visual area of the primate brain produces the oblique effect. We also provide an explanation for the unusual asymmetric patterns of inhibition that have been found surrounding MT neurons. These patterns are consistent with a mechanism within the visual system that prevents redundant velocity signals from being passed onto the next motion-integration stage, (dorsal Medial superior temporal, MSTd). We show that model redundancy-reduction mechanisms within the MT-MSTd pathway produce the oblique effect. |
| Document Type: | Article |
| Language: | English |
| ISSN: | 0042-6989 |
| DOI: | 10.1016/j.visres.2015.03.020 |
| Access URL: | https://pubmed.ncbi.nlm.nih.gov/25888929 https://www.sciencedirect.com/science/article/pii/S0042698915001224 https://www.sciencedirect.com/science/article/abs/pii/S0042698915001224 https://www.ncbi.nlm.nih.gov/pubmed/25888929 https://core.ac.uk/display/82270652 https://europepmc.org/abstract/MED/25888929 |
| Rights: | Elsevier Non-Commercial |
| Accession Number: | edsair.doi.dedup.....1ff4a23fee451ffbd97c1429b35c9b77 |
| Database: | OpenAIRE |
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Nájsť tento článok vo Web of Science | Abstract: | Motion direction discrimination in humans is worse for oblique directions than for the cardinal directions (the oblique effect). For some unknown reason, the human visual system makes systematic errors in the estimation of particular motion directions; a direction displacement near a cardinal axis appears larger than it really is whereas the same displacement near an oblique axis appears to be smaller. Although the perceptual effects are robust and are clearly measurable in smooth pursuit eye movements, all attempts to identify the neural underpinnings for the oblique effect have failed. Here we show that a model of image velocity estimation based on the known properties of neurons in primary visual cortex (V1) and the middle temporal (MT) visual area of the primate brain produces the oblique effect. We also provide an explanation for the unusual asymmetric patterns of inhibition that have been found surrounding MT neurons. These patterns are consistent with a mechanism within the visual system that prevents redundant velocity signals from being passed onto the next motion-integration stage, (dorsal Medial superior temporal, MSTd). We show that model redundancy-reduction mechanisms within the MT-MSTd pathway produce the oblique effect. |
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| ISSN: | 00426989 |
| DOI: | 10.1016/j.visres.2015.03.020 |