S‐potentials from colour units in the retina of fish (Cyprinidae)
- 1 August 1966
- journal article
- research article
- Published by Wiley in The Journal of Physiology
- Vol. 185 (3), 536-555
- https://doi.org/10.1113/jphysiol.1966.sp008001
Abstract
S-potentials recorded from the excised tench retina left undisturbed in the optic cup show color cells of the 2 types originally described by Svaetlchin and MacNichol (1958). One type (green/blue, G/B) is depolarized by signals from green cones and hyperpolarized by blue cones. The other type (red/green, H/G) is depolarized by deep red and hyperpolarized by green cones. By superposing spectral flashes upon steady adapting lights it is possible to find a spectral range in which only one kind of cone is effective. In this range the effect of any spectral light may be matched with that of any other provided the energies are linked in a fixed ratio that defines the action spectrum of the pigment. The green pigment has an action spectrum with maximum at 540 nm and corresponds well with the pigment that Marks measured in "green" cones. The blue pigment has not been measured, but it probably corresponds with that found by Marks in "blue" cones. However, the red pigment whose action spectrum we measured had its maximum at 680 nm, whereas the difference spectrum of Marks''s red cone pigment peaked at 620 nm. The 620 nm cones excite the luminosity S-units but not the R/G units. In the range where only one type of cone is effective the relation between the light intensity, Iq, and Vq, the S-potentlal generated (both expressed in suitable units), is given by an equation. It is the relation that would be found if cone signals Increased the conductance through a polarized S-membrane in proportion to the flux of caught quanta.This publication has 13 references indexed in Scilit:
- S‐potentials from luminosity units in the retina of fish (Cyprinidae)The Journal of Physiology, 1966
- An attempt to analyse colour reception by electrophysiologyThe Journal of Physiology, 1966
- Visual pigments of single goldfish conesThe Journal of Physiology, 1965
- Sensitive Low-Light-Level Microspectrophotometer: Detection of Photosensitive Pigments of Retinal ConesJournal of the Optical Society of America, 1964
- ORIGIN OF SO-CALLED CONE ACTION POTENTIALJournal of Neurophysiology, 1959
- Electric Responses from the Isolated Retinas of Fishes*American Journal of Ophthalmology, 1958
- A STUDY ON THE ORIGIN OF INTRARETINAL ACTION POTENTIAL OF THE CYPRINID FISH BY MEANS OF PENCIL-TYPE MICROELECTRODEThe Japanese Journal of Physiology, 1957
- The colour of light of very long wavelengthThe Journal of Physiology, 1955
- Some Quantitative Aspects of an Opponent-Colors Theory II Brightness, Saturation, and Hue in Normal and Dichromatic VisionJournal of the Optical Society of America, 1955
- Visual pigment 467, a photosensitive pigment present in tench retinaeThe Journal of Physiology, 1952