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Modular Representation of Luminance Polarity in the Superficial Layers of Primary Visual Cortex.
- Source :
-
Neuron [Neuron] 2015 Nov 18; Vol. 88 (4), pp. 805-18. - Publication Year :
- 2015
-
Abstract
- The spatial arrangement of luminance increments (ON) and decrements (OFF) falling on the retina provides a wealth of information used by central visual pathways to construct coherent representations of visual scenes. But how the polarity of luminance change is represented in the activity of cortical circuits remains unclear. Using wide-field epifluorescence and two-photon imaging we demonstrate a robust modular representation of luminance polarity (ON or OFF) in the superficial layers of ferret primary visual cortex. Polarity-specific domains are found with both uniform changes in luminance and single light/dark edges, and include neurons selective for orientation and direction of motion. The integration of orientation and polarity preference is evident in the selectivity and discrimination capabilities of most layer 2/3 neurons. We conclude that polarity selectivity is an integral feature of layer 2/3 neurons, ensuring that the distinction between light and dark stimuli is available for further processing in downstream extrastriate areas.<br /> (Copyright © 2015 Elsevier Inc. All rights reserved.)
- Subjects :
- Animals
Ferrets
Geniculate Bodies
Microscopy, Fluorescence
Motion Perception physiology
Photic Stimulation
Retina physiology
Space Perception physiology
Visual Cortex cytology
Evoked Potentials, Visual physiology
Neurons physiology
Visual Cortex physiology
Visual Pathways physiology
Visual Perception physiology
Subjects
Details
- Language :
- English
- ISSN :
- 1097-4199
- Volume :
- 88
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Neuron
- Publication Type :
- Academic Journal
- Accession number :
- 26590348
- Full Text :
- https://doi.org/10.1016/j.neuron.2015.10.019