Effect of sodium and potassium ions on the electrical activity of single cells in the lateral eye of the horseshoe crab

Kikuchi, R.; Naito, Katsumi; Tanaka, Ichiro

doi:10.1113/jphysiol.1962.sp006889

Cited by 51 publications

(12 citation statements)

References 25 publications

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“…By still unknown mechanisms, photoexcitation of rhodopsin molecules leads to a change in permeability of the photoreceptor membrane, giving rise to a depolarizing receptor potential. Studies on other invertebrate photoreceptors have shown that most of the receptor current is carried by Na+ ions (11). Moreover, several lines of evidence suggest that the receptor potentials of many invertebrates, including Drosophila, arise from the summation of a large number of small membrane voltage fluctuations, commonly referred to as quantum bumps (12,13).…”

mentioning

confidence: 99%

Photoreceptor Mutant of Drosophila : Is Protein Involved in Intermediate Steps of Phototransduction?

Paj

Istrit

Deland

et al. 1976

Science

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In norpA mutants of Drosophila melanogaster the phototransduction process is either partially or completely blocked. By using a temperature-sensitive allele, we have found that that norpA mutation has little or no effect on either the rhodopsin-metarhodopsin transition or the machinery of quantum bump production. Thus, the norpA lesion appears to be localized in the intermediate process of phototransduction. Because a temperature-sensitive allele of norpA has been isolated, the norpA gene probably encodes a protein involved in the process.

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mentioning

confidence: 99%

Photoreceptor Mutant of Drosophila : Is Protein Involved in Intermediate Steps of Phototransduction?

Paj

Istrit

Deland

et al. 1976

Science

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“…[Na] o 'in artışı ile AP'nin tepe değerlerinde gözlenen artış deneysel bulgulara [2,3,17,[22][23][24][25][26][27][28] paralel olmuştur, Tepe değerindeki bu artış doğal olarak eşik gerilimini ve depolarizasyon ve repolarizasyon sürelerini az da olsa etkilemiştir ki bunun da deneysel sonuçlara [2,3,17,[22][23][24][25][26][27][28] uyum sağladığı görülmektedir.…”

Section: Discussionunclassified

“…[K] o 'in artışı ile AP'de özellikle eşik geriliminde, hiperpolarizasyon ve dinlenim değerlerinde mutlak değerce bir düşüş ve AP süresinde bir miktar artış görülmesi deneysel çalışmalara [3,12,17,24,26,27] paralellik göstermektedir.…”

Section: Discussionunclassified

“…[Na] o 'in artışı ile deneysel bulgulara paralel olarak AP'nin tepe değerlerinde artış olmakta, ancak AP'nin diğer parametrelerinde ciddi bir değişim gözlenmemektedir. Tepe değerindeki bu artış doğal olarak eşik gerilimini ve depolarizasyon ve repolarizasyon sürelerini az da olsa etkilemiştir ki bunun da deneysel sonuçlara uyum sağladığı tespit edilmiştir [2,3,17,[22][23][24][25][26][27][28].…”

Section: Sonuçlarunclassified

“…[Na] i 'nin artışı ile deneysel sonuçlarla [17,27] [3,12,17,24,26,27] uygun AP'nin tepe gerilimi değişmezken eşik geriliminde, hiper-polarizasyon ve dinlenim değerlerinde mutlak değerce bir düşüş ve AP süresinde bir miktar artış görülmektedir.…”

Section: Sonuçlarunclassified

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Effect of external stimulus and ionic concentrations on Hodgkin-Huxley neural model

Tekin

Tağluk

Ertuğrul

2012

2012 20th Signal Processing and Communications Applications Conference (SIU)

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Hodgkin-Huxley (HH) neuron model has an important place in theoretical neuroscience. In the study, on the basis of HH neuron model, the effects of ionic sodium and potassium concentrations as well as the effect of excitation current density on AP were investigated. It was found that while sodium concentration predominantly affects the amplitude of AP, Potassium concentration affects the threshold and hyperpolarization levels. It was observed that the increase in excitation current level cause to early triggering of AP which leads to increase the AP/sec rate. This information may be used in theoretical neuroscience.

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Rhabdom structure and receptor potentials in single crayfish retinular cells

Eguchi

1965

J. Cell. Comp. Physiol.

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The effects of continuous darkness and abnormal ionic ratios (excess C a + + , Mg++, K + , and absence of N a + ) on the fine structure of the rhabdoms and on the intracellular retinal receptor potentials were studied in crayfish compound eyes. The normal rhabdom has its constituent microvilli regularly arranged in a characteristic cross-banded pattern. The normal retinular cell response consists of an initial transient peak and a sustained plateau. After the crayfish were kept for three months in the dark, the regular arrangement of rhabdom microvilli was markedly upset, and receptor potentials of retinular cells in the eye consisted only of the slow phase. The initial phase of the intracellular retinal receptor potential is more labile than the sustained phase (plateau) and was easily abolished if the rhabdom was so strongly affected by continuous darkness, excess Ca++, and excess K + that the fine structural arrangements of microtubules were destroyed. Since receptor potentials were recorded from compound eyes in which rhabdoms were deranged and almost all their microvilli torn off from the retinular cells, transmission of visual excitation from rhabdom to retinular cell soma must be possible without direct membranous connection between them.

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Effect of sodium and potassium ions on the electrical activity of single cells in the lateral eye of the horseshoe crab

Cited by 51 publications

References 25 publications

Photoreceptor Mutant of Drosophila : Is Protein Involved in Intermediate Steps of Phototransduction?

Photoreceptor Mutant of Drosophila : Is Protein Involved in Intermediate Steps of Phototransduction?

Effect of external stimulus and ionic concentrations on Hodgkin-Huxley neural model

Rhabdom structure and receptor potentials in single crayfish retinular cells

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