Literature DB >> 7231807

The effect of magnesium on the time course of facilitation at the crayfish neuromuscular junction.

J Dudel, H Parnas, I Parnas.   

Abstract

Synaptic currents (EPSCs) were recorded extracellularly from single junctions. Pairs of EPSCs were elicited at different intervals, the increase of amplitude of the second one facilitation. Elevated Mg concentrations reduced the amplitude of the EPSC and prolonged facilitation. Also, if the amplitude of the EPSCs at high Mg is made the same as in the control, by raising [Ca]0, facilitation is still prolonged. It is concluded that Mg inhibits not only the entry of Ca into the nerve terminal but also its removal.

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Year:  1981        PMID： 7231807     DOI： 10.1016/0304-3940(81)90081-1

Source DB:  PubMed          Journal:  Neurosci Lett        ISSN： 0304-3940            Impact factor:   3.046


  4 in total

1.  Neurotransmitter release and its facilitation in crayfish. I. Saturation kinetics of release, and of entry and removal of calcium.

Authors:  H Parnas; J Dudel; I Parnas
Journal:  Pflugers Arch       Date:  1982-03       Impact factor: 3.657

2.  Neurotransmitter release and its facilitation in crayfish. III. Amplitude of facilitation and inhibition of entry of calcium into the terminal by magnesium.

Authors:  J Dudel; I Parnas; H Parnas
Journal:  Pflugers Arch       Date:  1982-05       Impact factor: 3.657

3.  The effect of reduced calcium on quantal unit current and release at the crayfish neuromuscular junction.

Authors:  J Dudel
Journal:  Pflugers Arch       Date:  1981-07       Impact factor: 3.657

4.  Neurotransmitter release and its facilitation in crayfish. IV. The effect of Mg2+ ions on the duration of facilitation.

Authors:  H Parnas; J Dudel; I Parnas
Journal:  Pflugers Arch       Date:  1982-10       Impact factor: 3.657
  4 in total

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