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| dc.contributor | Universitat de Barcelona |
|---|---|
| dc.contributor.author | Supèr, Hendrik Anne |
| dc.contributor.author | Romeo Val, August |
| dc.date | 2016-02-22T14:37:36Z |
| dc.date | 2016-02-22T14:37:36Z |
| dc.date | 2011 |
| dc.date | 2016-02-22T14:37:36Z |
| dc.identifier.citation | 1932-6203 |
| dc.identifier.citation | 615798 |
| dc.identifier.uri | http://hdl.handle.net/2445/69709 |
| dc.description.abstract | In the visual cortex, feedback projections are conjectured to be crucial in figure-ground segregation. However, the precise function of feedback herein is unclear. Here we tested a hypothetical model of reentrant feedback. We used a previous developed 2-layered feedforwardspiking network that is able to segregate figure from ground and included feedback connections. Our computer model data show that without feedback, neurons respond with regular low-frequency (~9 Hz) bursting to a figure-ground stimulus. After including feedback the firing pattern changed into a regular (tonic) spiking pattern. In this state, we found an extra enhancement of figure responses and a further suppression of background responses resulting in a stronger figure-ground signal. Such push-pull effect was confirmed by comparing the figure-ground responses withthe responses to a homogenous texture. We propose that feedback controlsfigure-ground segregation by influencing the neural firing patterns of feedforward projecting neurons. |
| dc.format | 7 p. |
| dc.format | application/pdf |
| dc.language.iso | eng |
| dc.publisher | Public Library of Science (PLoS) |
| dc.relation | Reproducció del document publicat a: http://dx.doi.org/10.1371/journal.pone.0021641 |
| dc.relation | PLoS One, 2011, vol. 6, num. 6 |
| dc.relation | http://dx.doi.org/10.1371/journal.pone.0021641 |
| dc.rights | cc-by (c) Supèr, Hendrik Anne et al., 2011 |
| dc.rights | info:eu-repo/semantics/openAccess |
| dc.rights | http://creativecommons.org/licenses/by/3.0/es |
| dc.subject | Neurones |
| dc.subject | Còrtex visual |
| dc.subject | Cognició |
| dc.subject | Neurons |
| dc.subject | Visual cortex |
| dc.subject | Cognition |
| dc.title | Feedback enhances feedforward figure-ground segmentation by changing firing mode |
| dc.type | info:eu-repo/semantics/article |
| dc.type | info:eu-repo/semantics/publishedVersion |
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