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Lateral interactions in the outer retina.
Wallace B Thoreson1, Stuart C Mangel
1Department of Ophthalmology & Visual Sciences, University of Nebraska Medical Center, Omaha, NE 68198, USA. wbthores@unmc.edu
Progress in Retinal and Eye Research
|May 15, 2012
Summary
Horizontal cells in the outer retina use feedback and feed-forward pathways to shape visual processing. These lateral interactions are crucial for spatial discrimination and light adaptation.
Area of Science:
- Neuroscience
- Retinal Physiology
- Visual Processing
Background:
- Lateral interactions in the outer retina are vital for early visual processing.
- Horizontal cells play key roles through feedback to cones and feed-forward to bipolar cells.
Purpose of the Study:
- To review the contributions of horizontal cell feedback and feed-forward pathways to early visual processing.
- To examine mechanisms of horizontal cell feedback to cones and feed-forward to bipolar cells.
Main Methods:
- Review of existing literature on retinal circuits.
- Analysis of proposed mechanisms for horizontal cell signaling.
- Examination of receptive field properties of bipolar cells.
Main Results:
- Horizontal cell pathways contribute to center-surround receptive fields, enhancing spatial discrimination.
- These pathways are implicated in light adaptation and color opponency.
- Multiple mechanisms for horizontal cell feedback to cones are discussed, including GABA release and ephaptic modulation.
Conclusions:
- Horizontal cell lateral interactions are fundamental to retinal information processing.
- Understanding these pathways is key to comprehending visual perception.
- Further research is needed to fully elucidate the roles of specific feedback and feed-forward mechanisms.
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