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Decoding motion aftereffects from activity patterns in human visual cortex
| Content Provider | Semantic Scholar |
|---|---|
| Author | Horikawa, Tomoyasu Kamitani, Yukiyasu |
| Copyright Year | 2010 |
| Abstract | After prolonged exposure to a one-directionally moving stimulus, a stationary stimulus is perceived to move in the opposite direction of the preceding stimulus. This phenomenon, the motion aftereffect (MAE), is a useful tool for understanding brain activity associated with subjective experiences that occur independent of external stimuli. Previous fMRI studies revealed brain activation during MAE, but activity patterns associated with perceived directions have been elusive. Here, we used the fMRI decoding technique (Kamitani and Tong, 2006) to investigate how perceived directions of MAE are represented in brain activity patterns. Using fMRI voxel patterns measured while the subject perceived moving stimuli or MAEs on a stationary stimulus, we built statistical classifiers that predicted the perceived motion direction. When a classifier was trained and tested on moving stimuli, the direction could be predicted from each of the early visual areas (V1 through V3). However, only V3A/B showed significantly accurate classification in MAE decoding. When the classifier trained on moving stimuli was applied to brain activity during MAE, V3A/B, but not other areas, showed significantly accurate classification. These results indicate that perceived directions of MAE are represented by activity patterns similar to those induced by moving stimuli in V3A/B. As the areas other than V3A/B showed selectivity to stimulus directions but not to MAE directions, our finding challenges existing models of MAE in which stimulus and MAE directions are assumed to share common activity patterns in all direction-selective areas. |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.neures.2010.07.1699 |
| Alternate Webpage(s) | https://api.elsevier.com/content/article/pii/S0168010210018705 |
| Alternate Webpage(s) | https://www.sciencedirect.com/science/article/pii/S0168010210018705?dgcid=api_sd_search-api-endpoint |
| Alternate Webpage(s) | https://doi.org/10.1016/j.neures.2010.07.1699 |
| Volume Number | 68 |
| Journal | Neuroscience Research |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
