Mechanisms of perceptual organization provide auto-zoom and auto-localization for attention to objects
By Stefan Mihalas, Yi Dong, R. von der Heydt, Ernst Niebur. 2010
84 citations recorded by the source corpus.
Visual attention is often understood as a modulatory field acting at early stages of processing, but the mechanisms that direct and fit the field to the attended object are not known. We show that a purely spatial attention field propagating downward in the neuronal network responsible for perceptual organization will be reshaped, repositioned, and sharpened to match the object's shape and scale. Key features of the model are grouping neurons integrating local features into coherent tentative objects, excitatory feedback to the same local feature neurons that caused grouping neuron activation, and inhibition between incompatible interpretations both at the local feature level and at the object representation level.
Subfields: Cellular and Molecular Neuroscience, Cognitive Neuroscience
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In Cellular and Molecular Neuroscience
In Cognitive Neuroscience
Citations in the corpus
- Spike Synchrony Reveals Emergence of Proto-Objects in Visual Cortex (2015, background): “Because each grouping cell connects to a large number of feature neurons, controlling their gain, the top-down attention mechanism can select a myriad of widely distributed feature signals simply by activating a small number of grouping cells (Mihalas et al., 2011).”
- Figure–ground organization and the emergence of proto-objects in the visual cortex (2015, methodology): “There are two striking parallels: First, the intricate relationship between attentional modulation and border ownership selectivity (Figure 3; Qiu et al., 2007) indicating that these circuits provide a structure for object-based attention (Mihalas et al., 2011).”