Back to Search
Start Over
Fovea-Periphery Axis Symmetry of Surround Modulation in the Human Visual System
- Source :
- PLoS ONE, PLoS ONE, Vol 8, Iss 2, p e57906 (2013)
- Publication Year :
- 2013
- Publisher :
- Public Library of Science, 2013.
-
Abstract
- A visual stimulus activates different sized cortical area depending on eccentricity of the stimulus. Here, our aim is to understand whether the visual field size of a stimulus or cortical size of the corresponding representation determines how strongly it interacts with other stimuli. We measured surround modulation of blood-oxygenation-level-dependent signal and perceived contrast with surrounds that extended either towards the periphery or the fovea from a center stimulus, centered at 6° eccentricity. This design compares the effects of two surrounds which are identical in visual field size, but differ in the sizes of their cortical representations. The surrounds produced equally strong suppression, which suggests that visual field size of the surround determines suppression strength. A modeled population of neuronal responses, in which all the parameters were experimentally fixed, captured the pattern of results both in psychophysics and functional magnetic resonance imaging. Although the fovea-periphery anisotropy affects nearly all aspects of spatial vision, our results suggest that in surround modulation the visual system compensates for it.
- Subjects :
- Central Nervous System
Male
Fovea Centralis
Anatomy and Physiology
Time Factors
CLASSICAL RECEPTIVE-FIELD
genetic structures
Surround suppression
Visual System
RANGE LATERAL INTERACTIONS
lcsh:Medicine
Behavioral Neuroscience
0302 clinical medicine
Psychophysics
lcsh:Science
Visual Cortex
Physics
education.field_of_study
Multidisciplinary
05 social sciences
fMRI
CORTICAL-NEURONS
FUNCTIONAL MRI
Magnetic Resonance Imaging
AREA 17
Sensory Systems
Visual field
medicine.anatomical_structure
Human visual system model
Medicine
Sensory Perception
Female
MACAQUE V1 NEURONS
Research Article
515 Psychology
Population
Neurophysiology
SPATIAL INTERACTIONS
Neuroimaging
Stimulus (physiology)
SURFACE-BASED ANALYSIS
050105 experimental psychology
Contrast Sensitivity
03 medical and health sciences
APPARENT CONTRAST
medicine
Humans
0501 psychology and cognitive sciences
Second-order stimulus
education
Biology
RECURRENT NETWORK MODEL
lcsh:R
eye diseases
Oxygen
Visual cortex
Anisotropy
lcsh:Q
Visual Fields
Neuroscience
030217 neurology & neurosurgery
Photic Stimulation
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 8
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- PLoS ONE
- Accession number :
- edsair.doi.dedup.....abeafd1edfa64b0bebca331e9812ff69