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Related Experiment Videos

[Relation between the axonal membrane microfluidity and excitability].

D Georgescauld, J P Desmazès, H Duclohier

    Comptes Rendus Des Seances De La Societe De Biologie Et De Ses Filiales
    |January 1, 1983
    PubMed
    Summary

    Nerve action potentials transiently decrease membrane fluidity, as shown by changes in the Ie/Im ratio in garfish olfactory, rabbit vagus, and frog sciatic nerves labeled with pyrene. This suggests a temporary stiffening of the nerve membrane during electrical signaling.

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    The Journal of membrane biology·2001

    Area of Science:

    • Neuroscience
    • Biophysics
    • Membrane Physiology

    Context:

    • Investigating the biophysical properties of nerve membranes during electrical activity.
    • Utilizing fluorescent probes (pyrene and triethylammonium-butyl-pyrene) to monitor membrane dynamics.

    Purpose:

    • To determine if nerve membrane fluidity changes during an action potential.
    • To correlate changes in membrane fluidity with electrical signaling events.

    Summary:

    • Action potentials in garfish olfactory, rabbit vagus, and frog sciatic nerves were studied using fluorescently labeled probes.
    • A transient decrease in the Ie/Im ratio was observed during the action potential.
    • This decrease suggests a small, transient reduction in nerve membrane fluidity.

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    Impact:

    • Provides insights into the dynamic mechanical changes of nerve membranes during excitation.
    • Contributes to understanding the physical basis of nerve impulse propagation.
    • Highlights the interplay between electrical activity and membrane structural properties.