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PMID: 2622756 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Membrane currents in lizard motor nerve terminals and nodes of Ranvier.

Pflugers Archiv : European journal of physiology ·Vol. 415 ·No. 1 ·1989-10-00 ·Pages 81-7

Angaut-Petit D, Benoit E, Mallart A

Abstract

Presynaptic membrane currents were recorded by external electrodes and nodal membrane currents were obtained by the voltage clamp technique in motor nerve endings and nodes of Ranvier of the lizard Anolis carolinensis. Although of compact shape, lizard motor endings display relatively long terminal branches; they exhibit, in agreement with previous findings in mouse and frog motor terminals, Na, Ca and K conductances, the latter consisting of a voltage- and a Ca-dependent type. Lizard nodes of Ranvier, like those of the frog, but unlike those of the mouse, exhibit a K conductance. These observations provide an explanation for the differences and similarities in presynaptic wave form configuration between the lizard and the other two species.

MeSH Terms
Animals Calcium/metabolism Cell Membrane/drug effects,physiology Cell Membrane Permeability Electric Conductivity Lizards/physiology Motor Endplate/anatomy & histology,drug effects,physiology Neuromuscular Junction/physiology Potassium/metabolism Ranvier's Nodes/drug effects,physiology Sodium/metabolism Synapses/physiology Tetraethylammonium Tetraethylammonium Compounds/pharmacology Tetrodotoxin/pharmacology
Chemicals
Tetraethylammonium Compounds Tetrodotoxin Tetraethylammonium Sodium Potassium Calcium
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Angaut-Petit D
Laboratoire de Neurobiologie Cellulaire et Moléculaire, C.N.R.S., Gif-sur-Yvette, France.
Benoit E
Mallart A
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Article Info
Journal
Pflugers Archiv : European journal of physiology
Abbr.
Pflugers Arch
ISSN
0031-6768
DOI
10.1007/BF00373144
Published
1989-10-00
Pages
81-7
Language
English
Region
Germany
NLM ID
0154720
Subset
IM
External Links
PubMed source DOI: 10.1007/BF00373144 View journal details
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