Updating views of visual updating
| Autor: | John A. Assad |
|---|---|
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Nature. 507:434-435 |
| ISSN: | 1476-4687 0028-0836 |
| DOI: | 10.1038/507434a |
| Popis: | Our brains create a stable view of the world even though our eyes dart around. A study of how the brain might compensate for eye movements reveals an unexpected twist in the vision-stabilizing mechanism. See Letter p.504 As we take in a visual scene we make rapid eye movements — called saccades — that bring different parts of the scene to the fovea, the region of the retina with highest acuity. These eye movements cause substantial shifts in the retinal image, but our perception of the visual world is stable and continuous. Tirin Moore and colleagues find a possible mechanism for this stability in prefrontal neurons. They show that during preparation for eye movement, neurons shift their visual receptive fields (those regions of space that neurons are most responsive to) in order to massively over-represent behaviourally relevant areas, consistent with human visual perception. These findings run counter to a long-standing hypothesis — that receptive fields predictively remap, shifting the representation of visual space by neurons in the brain in anticipation of the outcome of each eye movement. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|