Related Experiment Video
Updated: Feb 5, 2026
06:02
Topographical Estimation of Visual Population Receptive Fields by fMRI
Published on: February 3, 2015
9.7K
Receptive field center-surround interactions mediate context-dependent spatial contrast encoding in the retina.
Maxwell H Turner1,2, Gregory W Schwartz3,4, Fred Rieke1
1Department of Physiology and Biophysics, University of Washington, Seattle, United States.
Elife
|September 7, 2018
Summary
The receptive field surround in retinal ganglion cells, contrary to prior models, influences spatial contrast encoding by altering how the center integrates visual information. This finding is particularly relevant for natural stimuli and suggests new roles for the surround in visual processing.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Vision Science
Background:
- Antagonistic receptive field surrounds are fundamental to early sensory processing.
- Conventional models assume surrounds are added after center signal formation.
- Emerging evidence suggests surrounds are integrated before center summation.
Purpose of the Study:
- To investigate the impact of receptive field architecture on spatial contrast encoding.
- To challenge the assumption of surround addition post-center signal formation.
- To explore the role of receptive field surrounds in natural visual stimuli processing.
Main Methods:
- Analysis of receptive field architecture in macaque monkey retinal ganglion cells.
- Modeling of spatial contrast encoding based on anatomical and functional observations.
- Comparison of proposed model with classic center-surround models.
Main Results:
- Receptive field surrounds, integrated early, modulate spatial contrast sensitivity.
- The surround influences how the center integrates visual information spatially.
- This effect is pronounced with correlated center and surround signals, common in natural scenes.
Conclusions:
- The timing of surround integration significantly impacts spatial contrast encoding.
- The surround's role in shaping ganglion cell sensitivity to natural inputs may be underestimated.
- This challenges traditional center-surround models and suggests novel functional roles for receptive field surrounds.
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