Fovea-Periphery Axis Symmetry of Surround Modulation in the Human Visual System

Nurminen, Lauri; Kilpeläinen, Markku; Vanni, Simo
February 2013
PLoS ONE;Feb2013, Vol. 8 Issue 2, p1
Academic Journal
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.


Related Articles

  • A Survey of the Sources of Noise in fMRI. Greve, Douglas; Brown, Gregory; Mueller, Bryon; Glover, Gary; Liu, Thomas // Psychometrika;Jul2013, Vol. 78 Issue 3, p396 

    Functional magnetic resonance imaging (fMRI) is a noninvasive method for measuring brain function by correlating temporal changes in local cerebral blood oxygenation with behavioral measures. fMRI is used to study individuals at single time points, across multiple time points (with or without...

  • The Names. Richardsen, Daniel Bezalel // Arc Poetry Magazine;Winter2017, Vol. 82, p146 

    No abstract available.

  • Increased Cortical Activity in Binge Drinkers during Working Memory Task: A Preliminary Assessment through a Functional Magnetic Resonance Imaging Study. Campanella, Salvatore; Peigneux, Philippe; Petit, Géraldine; Lallemand, Frédéric; Saeremans, Mélanie; Noël, Xavier; Metens, Thierry; Nouali, Mustapha; De Tiège, Xavier; De Witte, Philippe; Ward, Roberta; Verbanck, Paul // PLoS ONE;Apr2013, Vol. 8 Issue 4, p1 

    Background: Cerebral dysfunction is a common feature of both chronic alcohol abusers and binge drinkers. Here, we aimed to study whether, at equated behavioral performance levels, binge drinkers exhibited increased neural activity while performing simple cognitive tasks. Methods: ...

  • Resting State Brain Function Analysis Using Concurrent BOLD in ASL Perfusion fMRI. Zhu, Senhua; Fang, Zhuo; Hu, Siyuan; Wang, Ze; Rao, Hengyi // PLoS ONE;Jun2013, Vol. 8 Issue 6, p1 

    The past decade has seen astounding discoveries about resting-state brain activity patterns in normal brain as well as their alterations in brain diseases. While the vast majority of resting-state studies are based on the blood-oxygen-level-dependent (BOLD) functional MRI (fMRI), arterial spin...

  • Built-in delay in the brain.  // Ophthalmology Times;11/6/95, Vol. 20 Issue 43, p11 

    Features the finding that the brain locates a visual target for a subsequent eye movement without necessarily initiating the movement. Report by the researchers at Nashville, Tennessee-based Vanderbilt University in the October 1995 issue of the ` Journal of Neuroscience'; Implications of the...

  • In the mind's eye. Motluk, Alison // New Scientist;09/20/97, Vol. 155 Issue 2100, p14 

    Reports on research showing that the brain has a special region that can recognize all kinds of subtle visual discrimination aside from human faces. Rejection of prevailing theory that the brain has a special face identification area; Use of functional magnetic resonance imaging to see which...

  • When a present speaks a thousand words.  // New Scientist;10/11/2008, Vol. 199 Issue 2677, p16 

    The article reports on the study conducted by Kristian Tylén and colleagues on which part of the brain was used in understanding the meaning behind items place in a symbolic manner in Denmark. Researchers used functional magnetic resonance imaging (fMRI) to scan the brains of volunteers as...

  • Asynchronous perception of motion and luminance change. Kerzel, Dirk // Psychological Research;2003, Vol. 67 Issue 4, p233 

    Observers were asked to indicate when a target moving on a circular trajectory changed its luminance. The judged position of the luminance change was displaced from the true position in the direction of motion, indicating differences between the times-to-consciousness of motion and luminance...

  • Thermoencephaloscopy of brain responses to emotionally significant visual stimuli in depressive patients. A. Iznak; M. Nikishova // Human Physiology;May2007, Vol. 33 Issue 3, p370 

    Abstract  The thermoencephaloscopic study of patients with reactive depression during exposure to emotionally significant visual stimuli detected a functional change in the state of the frontal associative area of the right hemisphere and the parietal associative area of the left...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics