Format

Send to

Choose Destination
See comment in PubMed Commons below
J Vis. 2013 Jan 23;13(1). pii: 25. doi: 10.1167/13.1.25.

Visual attention and flexible normalization pools.

Author information

  • 1Dominick Purpura Department of Neuroscience and Department of Systems and Computational Biology, Albert Einstein College of Medicine, Bronx, NY, USA. odelia.schwartz@einstein.yu.edu

Abstract

Attention to a spatial location or feature in a visual scene can modulate the responses of cortical neurons and affect perceptual biases in illusions. We add attention to a cortical model of spatial context based on a well-founded account of natural scene statistics. The cortical model amounts to a generalized form of divisive normalization, in which the surround is in the normalization pool of the center target only if they are considered statistically dependent. Here we propose that attention influences this computation by accentuating the neural unit activations at the attended location, and that the amount of attentional influence of the surround on the center thus depends on whether center and surround are deemed in the same normalization pool. The resulting form of model extends a recent divisive normalization model of attention (Reynolds & Heeger, 2009). We simulate cortical surround orientation experiments with attention and show that the flexible model is suitable for capturing additional data and makes nontrivial testable predictions.

PMID:
23345413
PMCID:
PMC3587008
DOI:
10.1167/13.1.25
[PubMed - indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Silverchair Information Systems Icon for PubMed Central
    Loading ...
    Support Center