Electrophysiological measurements of spectral sensitivity of central visual cells in eye of blowfly

Nature ◽  
1976 ◽  
Vol 260 (5549) ◽  
pp. 342-344 ◽  
Author(s):  
PETER MEFFERT ◽  
ULRICH SMOLA
Keyword(s):  
Spectral Sensitivity ◽  
Visual Cells ◽  
Electrophysiological Measurements

scholarly journals Spectral Sensitivity of Single Visual Cells

Nature ◽  
1961 ◽  
Vol 190 (4776) ◽  
pp. 639-639 ◽  
Author(s):  
H. AUTRUM ◽  
D. BURKHARDT
Keyword(s):  
Spectral Sensitivity ◽  
Visual Cells

Spectral sensitivity of visual cells of the compound eye ofBlatta orientalis

1985 ◽  
Vol 17 (1) ◽  
pp. 48-51 ◽  
Author(s):  
G. A. Mazokhin-Porshnyakov ◽  
A. D. Cherkasov
Keyword(s):  
Spectral Sensitivity ◽  
Compound Eye ◽  
Visual Cells

UV fine structure of the spectral sensitivity of flies visual cells

1980 ◽  
Vol 67 (11) ◽  
pp. 565-566 ◽  
Author(s):  
R. Gemperlein ◽  
R. Paul ◽  
E. Lindauer ◽  
A. Steiner
Keyword(s):  
Fine Structure ◽  
Spectral Sensitivity ◽  
Visual Cells

scholarly journals Properties of visual cells in the lateral eye of Limulus in situ.

1975 ◽  
Vol 66 (3) ◽  
pp. 303-326 ◽  
Author(s):  
E Kaplan ◽  
R B Barlow
Keyword(s):  
Optic Nerve ◽  
Spectral Sensitivity ◽  
Dark Adaptation ◽  
The Other ◽  
Low Light ◽  
Visual Cells ◽  
Increment Threshold ◽  
Lateral Eye ◽  
Nerve Recordings

Excitatory properties of visual cells in the lateral eye of Limulus, investigated by optic nerve recordings in situ, differ significantly from the properties of cells in the classical, excised eye preparation. The differences suggest the possibility that two receptor mechanisms function in the eye in situ: one mechanism encodes low light intensities and the other responds to high intensities. The two mechanisms enable each ommatidium to respond over an intensity range of approximately 10 log units. This hypothesis was tested by measuring the increment threshold and the spectral sensitivity, by studying light and dark adaptation, and by analyzing the variability of the impulse discharge. Although the results do not conclusively identify two receptor mechanisms, they indicate that a process or a part of a process that functions in the eye in situ is abolished by excising the eye or cutting off its blood supply.

scholarly journals Formation, conversion, and utilization of isorhodopsin, rhodopsin, and porphyropsin by rod photoreceptors in the Xenopus retina.

1978 ◽  
Vol 72 (6) ◽  
pp. 821-836 ◽  
Author(s):  
P Witkovsky ◽  
G A Engbretson ◽  
H Ripps
Keyword(s):  
Vitamin A ◽  
Spectral Sensitivity ◽  
Visual Pigment ◽  
Pigment Content ◽  
Complete Darkness ◽  
Visual Transduction ◽  
Deficient Diet ◽  
Rod Photoreceptors ◽  
Electrophysiological Measurements ◽  
Lighting Regimen

The visual pigment content of rod photoreceptors in Xenopus larvae was reduced greater than 90% through a combination of vitamin A-deficient diet and constant light. Thereafter, a dose of either all-trans-retinol or 9-cis-retinal was injected intramuscularly, leading to the formation of a rhodopsin (lambdamax 504 nm) or isorhodopsin (lambdamax 487-493 nm) pigment, respectively. Electrophysiological measurements were made of the threshold and spectral sensitivity of the aspartate-isolated PIII (photoreceptoral) component of the electroretinogram. These measures established that either rhodopsin or isorhodopsin subserved visual transduction with the same efficiency as the 519 nm porphyropsin pigment encountered normally. When animals with rhodopsin or isorhodopsin were kept in darkness or placed on a cyclical lighting regimen for 8 days, retinal densitometry showed that either pigment was being converted to porphyropsin; significantly more porphyropsin was formed as a result of cyclical lighting than after complete darkness.

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