Stimulus contrast and retinogeniculate signal processing
Neuronal signals conveying luminance contrast play a key role in nearly all aspects of perception, including depth perception, texture discrimination, and motion perception. Although much is known about the retinal mechanisms responsible for encoding contrast information, relatively little is known...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2016-02-01
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| Series: | Frontiers in Neural Circuits |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fncir.2016.00008/full |
| _version_ | 1811302296649203712 |
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| author | Daniel Llewellyn Rathbun Daniel Llewellyn Rathbun Henry Joseph Alitto Henry Joseph Alitto David K. Warland David K. Warland W. Martin eUsrey W. Martin eUsrey |
| author_facet | Daniel Llewellyn Rathbun Daniel Llewellyn Rathbun Henry Joseph Alitto Henry Joseph Alitto David K. Warland David K. Warland W. Martin eUsrey W. Martin eUsrey |
| author_sort | Daniel Llewellyn Rathbun |
| collection | DOAJ |
| description | Neuronal signals conveying luminance contrast play a key role in nearly all aspects of perception, including depth perception, texture discrimination, and motion perception. Although much is known about the retinal mechanisms responsible for encoding contrast information, relatively little is known about the relationship between stimulus contrast and the processing of neuronal signals between visual structures. Here we describe simultaneous recordings from monosynaptically connected retinal ganglion cells and lateral geniculate nucleus (LGN) neurons in the cat to determine how stimulus contrast affects the communication of visual signals between the two structures. Our results indicate that 1) LGN neurons typically reach their half-maximal response at lower contrasts than their individual retinal inputs, and 2) LGN neurons exhibit greater contrast-dependent phase advance (CDPA) than their retinal inputs. Further analyses suggests that increased sensitivity relies on spatial convergence of multiple retinal inputs, while increased CDPA is achieved, in part, on temporal summation of arriving signals. |
| first_indexed | 2024-04-13T07:25:42Z |
| format | Article |
| id | doaj.art-44e893f8978e48b0bc43931b2ee04369 |
| institution | Directory Open Access Journal |
| issn | 1662-5110 |
| language | English |
| last_indexed | 2024-04-13T07:25:42Z |
| publishDate | 2016-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neural Circuits |
| spelling | doaj.art-44e893f8978e48b0bc43931b2ee043692022-12-22T02:56:29ZengFrontiers Media S.A.Frontiers in Neural Circuits1662-51102016-02-011010.3389/fncir.2016.00008175669Stimulus contrast and retinogeniculate signal processingDaniel Llewellyn Rathbun0Daniel Llewellyn Rathbun1Henry Joseph Alitto2Henry Joseph Alitto3David K. Warland4David K. Warland5W. Martin eUsrey6W. Martin eUsrey7University of California, DavisInstitute for Ophthalmology and Center for Integrative NeuroscienceUniversity of California, DavisUniversity of California, DavisUniversity of California, DavisUniversity of California, DavisUniversity of California, DavisUniversity of California, DavisNeuronal signals conveying luminance contrast play a key role in nearly all aspects of perception, including depth perception, texture discrimination, and motion perception. Although much is known about the retinal mechanisms responsible for encoding contrast information, relatively little is known about the relationship between stimulus contrast and the processing of neuronal signals between visual structures. Here we describe simultaneous recordings from monosynaptically connected retinal ganglion cells and lateral geniculate nucleus (LGN) neurons in the cat to determine how stimulus contrast affects the communication of visual signals between the two structures. Our results indicate that 1) LGN neurons typically reach their half-maximal response at lower contrasts than their individual retinal inputs, and 2) LGN neurons exhibit greater contrast-dependent phase advance (CDPA) than their retinal inputs. Further analyses suggests that increased sensitivity relies on spatial convergence of multiple retinal inputs, while increased CDPA is achieved, in part, on temporal summation of arriving signals.http://journal.frontiersin.org/Journal/10.3389/fncir.2016.00008/fullRetinaThalamusVisioncodingLGN |
| spellingShingle | Daniel Llewellyn Rathbun Daniel Llewellyn Rathbun Henry Joseph Alitto Henry Joseph Alitto David K. Warland David K. Warland W. Martin eUsrey W. Martin eUsrey Stimulus contrast and retinogeniculate signal processing Frontiers in Neural Circuits Retina Thalamus Vision coding LGN |
| title | Stimulus contrast and retinogeniculate signal processing |
| title_full | Stimulus contrast and retinogeniculate signal processing |
| title_fullStr | Stimulus contrast and retinogeniculate signal processing |
| title_full_unstemmed | Stimulus contrast and retinogeniculate signal processing |
| title_short | Stimulus contrast and retinogeniculate signal processing |
| title_sort | stimulus contrast and retinogeniculate signal processing |
| topic | Retina Thalamus Vision coding LGN |
| url | http://journal.frontiersin.org/Journal/10.3389/fncir.2016.00008/full |
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