Motion extrapolation in the central fovea.
Neural transmission latency would introduce a spatial lag when an object moves across the visual field, if the latency was not compensated. A visual predictive mechanism has been proposed, which overcomes such spatial lag by extrapolating the position of the moving object forward. However, a forward...
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Public Library of Science (PLoS)
2012
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oai:doaj.org-article:897a32c05a1846109d227e1fad54c2ac2021-11-18T07:25:04ZMotion extrapolation in the central fovea.1932-620310.1371/journal.pone.0033651https://doaj.org/article/897a32c05a1846109d227e1fad54c2ac2012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22438976/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Neural transmission latency would introduce a spatial lag when an object moves across the visual field, if the latency was not compensated. A visual predictive mechanism has been proposed, which overcomes such spatial lag by extrapolating the position of the moving object forward. However, a forward position shift is often absent if the object abruptly stops moving (motion-termination). A recent "correction-for-extrapolation" hypothesis suggests that the absence of forward shifts is caused by sensory signals representing 'failed' predictions. Thus far, this hypothesis has been tested only for extra-foveal retinal locations. We tested this hypothesis using two foveal scotomas: scotoma to dim light and scotoma to blue light. We found that the perceived position of a dim dot is extrapolated into the fovea during motion-termination. Next, we compared the perceived position shifts of a blue versus a green moving dot. As predicted the extrapolation at motion-termination was only found with the blue moving dot. The results provide new evidence for the correction-for-extrapolation hypothesis for the region with highest spatial acuity, the fovea.Zhuanghua ShiRomi NijhawanPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 3, p e33651 (2012) |
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Medicine R Science Q |
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Medicine R Science Q Zhuanghua Shi Romi Nijhawan Motion extrapolation in the central fovea. |
| description |
Neural transmission latency would introduce a spatial lag when an object moves across the visual field, if the latency was not compensated. A visual predictive mechanism has been proposed, which overcomes such spatial lag by extrapolating the position of the moving object forward. However, a forward position shift is often absent if the object abruptly stops moving (motion-termination). A recent "correction-for-extrapolation" hypothesis suggests that the absence of forward shifts is caused by sensory signals representing 'failed' predictions. Thus far, this hypothesis has been tested only for extra-foveal retinal locations. We tested this hypothesis using two foveal scotomas: scotoma to dim light and scotoma to blue light. We found that the perceived position of a dim dot is extrapolated into the fovea during motion-termination. Next, we compared the perceived position shifts of a blue versus a green moving dot. As predicted the extrapolation at motion-termination was only found with the blue moving dot. The results provide new evidence for the correction-for-extrapolation hypothesis for the region with highest spatial acuity, the fovea. |
| format |
article |
| author |
Zhuanghua Shi Romi Nijhawan |
| author_facet |
Zhuanghua Shi Romi Nijhawan |
| author_sort |
Zhuanghua Shi |
| title |
Motion extrapolation in the central fovea. |
| title_short |
Motion extrapolation in the central fovea. |
| title_full |
Motion extrapolation in the central fovea. |
| title_fullStr |
Motion extrapolation in the central fovea. |
| title_full_unstemmed |
Motion extrapolation in the central fovea. |
| title_sort |
motion extrapolation in the central fovea. |
| publisher |
Public Library of Science (PLoS) |
| publishDate |
2012 |
| url |
https://doaj.org/article/897a32c05a1846109d227e1fad54c2ac |
| work_keys_str_mv |
AT zhuanghuashi motionextrapolationinthecentralfovea AT rominijhawan motionextrapolationinthecentralfovea |
| _version_ |
1718423485940760576 |