Repetitive spikes in photoreceptor axons of the scorpion eye. Invertebrate eye structure and tetrodotoxin

A graded depolarization accompanied by nerve impulses can be recorded from the scorpion lateral and median eyes in response to light. Electron microscopy shows that axons forming the optic nerve arise directly from the photoreceptors. Thus, photoreceptors must respond both by the generation of a slo...

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Detalles Bibliográficos
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1975
Materias:
Articles
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2226219/
https://www.ncbi.nlm.nih.gov/pubmed/1194888
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description A graded depolarization accompanied by nerve impulses can be recorded from the scorpion lateral and median eyes in response to light. Electron microscopy shows that axons forming the optic nerve arise directly from the photoreceptors. Thus, photoreceptors must respond both by the generation of a slow receptor potential and the initiation of spikes. The latency of the first spike, and the maximal and mean discharge frequencies were a function of light intensity. Spikes were abolished by tetrodotoxin. Repetitive firing to light therefore appears to be a normal response of scorpion photoreceptors and is the result of regenerative Na influx in the cell membrane.
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spelling pubmed-22262192008-04-23 Repetitive spikes in photoreceptor axons of the scorpion eye. Invertebrate eye structure and tetrodotoxin J Gen Physiol Articles A graded depolarization accompanied by nerve impulses can be recorded from the scorpion lateral and median eyes in response to light. Electron microscopy shows that axons forming the optic nerve arise directly from the photoreceptors. Thus, photoreceptors must respond both by the generation of a slow receptor potential and the initiation of spikes. The latency of the first spike, and the maximal and mean discharge frequencies were a function of light intensity. Spikes were abolished by tetrodotoxin. Repetitive firing to light therefore appears to be a normal response of scorpion photoreceptors and is the result of regenerative Na influx in the cell membrane. The Rockefeller University Press 1975-11-01 /pmc/articles/PMC2226219/ /pubmed/1194888 Text en This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Articles
Repetitive spikes in photoreceptor axons of the scorpion eye. Invertebrate eye structure and tetrodotoxin
title Repetitive spikes in photoreceptor axons of the scorpion eye. Invertebrate eye structure and tetrodotoxin
title_full Repetitive spikes in photoreceptor axons of the scorpion eye. Invertebrate eye structure and tetrodotoxin
title_fullStr Repetitive spikes in photoreceptor axons of the scorpion eye. Invertebrate eye structure and tetrodotoxin
title_full_unstemmed Repetitive spikes in photoreceptor axons of the scorpion eye. Invertebrate eye structure and tetrodotoxin
title_short Repetitive spikes in photoreceptor axons of the scorpion eye. Invertebrate eye structure and tetrodotoxin
title_sort repetitive spikes in photoreceptor axons of the scorpion eye. invertebrate eye structure and tetrodotoxin
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2226219/
https://www.ncbi.nlm.nih.gov/pubmed/1194888

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