Reconstruction of shape contours from V1 activity at high resolution.

Abstract:

:The role of primary visual cortex (V1) in encoding physical stimulus features is well known, while stimulus categorization is mainly attributed to higher visual areas. However, visual experience is not stripped down to invariant, categorical-only "labels." Rather, visual experiences are remarkably rich with details resulting in high-resolution perception of objects. If V1 is involved in this process, high-resolution readout of shape contours should be possible from V1 activity. To test this, we presented various shapes to awake, fixating monkeys while recording V1 population activity using voltage-sensitive dye imaging. A simplified bottom-up model was constructed based on known cortical properties and without an image prior. Contours were reconstructed from single trials, in sub-degree resolution by applying the inverse model to neuronal responses. These novel reconstruction results suggest V1 can be an important constituent in the detailed internal representation of visual experiences.

journal_name

Neuroimage

journal_title

NeuroImage

authors

Zurawel G,Shamir I,Slovin H

doi

10.1016/j.neuroimage.2015.10.072

subject

Has Abstract

pub_date

2016-01-15 00:00:00

pages

1005-1012

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(15)00996-9

journal_volume

125

pub_type

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