Recurrent networks in human visual cortex: psychophysical evidence
JOSA A, Vol. 18, Issue 9, pp. 2228-2236 (2001)
http://dx.doi.org/10.1364/JOSAA.18.002228
Acrobat PDF (800 KB)
Abstract
To study the neuronal circuitry underlying visual spatial-integration processes, we measured the effect of short and long chains of proximal Gabor-signal (GS) flankers (σ=λ=0.15°) on the contrast-discrimination function of a foveal GS target. We found that the same pattern of lateral masks enhanced target detection with low-contrast pedestals and strongly suppressed the discrimination of a range of intermediate pedestal contrasts (pedestal contrast <30%). Increasing the number of the flankers reversed the suppressive effect. The data suggest that the main influence of the proximal flankers is maintained by activity-dependent interactions and not by linear spatial summation. With an increased number of flankers, we found a nonmonotonic relationship between the discrimination thresholds and the number of flankers, supporting the notion that the discrimination thresholds are mediated by excitatory–inhibitory recurrent networks that manifest the dynamics of large neuronal populations in the neocortex [Proc. Natl. Acad. Sci. USA 94, 10426 (1997)].
© 2001 Optical Society of America
[Optical Society of America ]
OCIS Codes
(330.1800) Vision, color, and visual optics : Vision - contrast sensitivity
(330.4060) Vision, color, and visual optics : Vision modeling
(330.6110) Vision, color, and visual optics : Spatial filtering
Citation
Yael Adini and Dov Sagi, "Recurrent networks in human visual cortex: psychophysical evidence," J. Opt. Soc. Am. A 18, 2228-2236 (2001)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-18-9-2228
You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
Related Journal Articles 
- Spatial-scale contribution to the detection of mirror symmetry in fractal noise (JOSAA)
- Effect of background components on spatial-frequency masking (JOSAA)
- Spatial summation of peripheral Gabor patches (JOSAA)
- Contrast sensitivity function and image discrimination (JOSAA)
- Discrimination of wide-field images as a test of a peripheral-vision model (JOSAA)
Related Conference Papers
- Theoretical influence of Stiles-Crawford effect on vision with decentered pupils
- Spatial frequency tuned covariance channels underlying scotopic contrast sensitivity
- Vision and optical quality in keratoconus
- Anterior segment geometry and image formation on the retina: evaluation of limits in the emmetropic human eye
- Modulations in the Images of Periodic Square-Wave Targets by Human Eye in the Presence of Stiles-Crawford Effect of the First Kind
« Previous Article | Next Article »
OSA is a member of 