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Spectral sensitivity of the feedback signal from horizontal cells to cones in goldfish retina

Published online by Cambridge University Press:  01 May 1998

D.A. KRAAIJ ,
M. KAMERMANS  and
H. SPEKREIJSE
D.A. KRAAIJ
Affiliation:
Graduate School Neurosciences Amsterdam, The Laboratory of Medical Physics, Academic Medical Centre, University of Amsterdam and The Netherlands Ophthalmic Research Institute, Department of Visual System Analysis, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
M. KAMERMANS
Affiliation:
Graduate School Neurosciences Amsterdam, The Laboratory of Medical Physics, Academic Medical Centre, University of Amsterdam and The Netherlands Ophthalmic Research Institute, Department of Visual System Analysis, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
H. SPEKREIJSE
Affiliation:
Graduate School Neurosciences Amsterdam, The Laboratory of Medical Physics, Academic Medical Centre, University of Amsterdam and The Netherlands Ophthalmic Research Institute, Department of Visual System Analysis, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
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Abstract

The spectral sensitivity of cones in isolated goldfish retina was determined with whole-cell recording techniques. Three spectral classes of cones were found with maximal sensitivities around 620 nm, 540 nm, and 460 nm. UV-cones were not found because our stimulator did not allow effective stimulation in the UV range. The spectral sensitivity of the cones closely matched the cone photopigment absorption spectra at the long wavelength side of the spectrum, but deviated significantly at shorter wavelengths. Surround stimulation induced an inward current in cones due to feedback from horizontal cells. The spectral sensitivity of this feedback signal was determined in all three cone classes and found to be broader than the spectral sensitivity of the cones recorded from, and to be spectrally nonopponent. These data are consistent with a connectivity scheme between cones and horizontal cells in which the three horizontal cell systems feed back to all cone systems and in which all horizontal cell systems receive input from more than one cone system.

Keywords

Spectral sensitivityConesHorizontal cellsGoldfishRetina
Type
Research Article
Information
Visual Neuroscience , Volume 15 , Issue 5 , May 1998 , pp. 799 - 808
Copyright
1998 Cambridge University Press

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