Coding of saliency by ensemble bursting in the amygdala of primates
| Autor: | S.L. Gonzalez Andino, R. Grave de Peralta Menendez |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
active vision
genetic structures Cognitive Neuroscience ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Amygdala lcsh:RC321-571 ensemble bursting Behavioral Neuroscience Bursting InformationSystems_MODELSANDPRINCIPLES fixations medicine Saliency map Computer vision Original Research Article Active vision lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry business.industry saliency Neuropsychology and Physiological Psychology medicine.anatomical_structure Salient Fixation (visual) Artificial intelligence business Psychology psychological phenomena and processes Neuroscience Coding (social sciences) |
| Zdroj: | Frontiers in Behavioral Neuroscience, Vol 6 (2012) Frontiers in Behavioral Neuroscience |
| ISSN: | 1662-5153 |
| DOI: | 10.3389/fnbeh.2012.00038/full |
| Popis: | Salient parts of a visual scene attract longer and earlier fixations of the eyes. Saliency is driven by bottom-up (image dependent) factors and top-down factors such as behavioral relevance, goals, and expertise. It is currently assumed that a saliency map defining eye fixation priorities is stored in neural structures that remain to be determined. Lesion studies support a role for the amygdala in detecting saliency. Here we show that neurons in the amygdala of primates fire differentially when the eyes approach to or fixate behaviorally relevant parts of visual scenes. Ensemble bursting in the amygdala accurately predicts main fixations during the free-viewing of natural images. However, fixation prediction is significantly better for faces - where a bottom-up computational saliency model fails - compared to unfamiliar objects and landscapes. On this basis we propose the amygdala as a locus for a saliency map and ensemble bursting as a saliency coding mechanism. |
| Databáze: | OpenAIRE |
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