Reports

Laser interferometer measurement of changes in crayfish axon diameter concurrent with action potential

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Science  22 Apr 1977:
Vol. 196, Issue 4288, pp. 426-428
DOI: 10.1126/science.850785

Abstract

Small rapid changes in the diameter of an axon takes place when an action potential progresses along the axon. In the giant axon of the crayfish these occur within a period of about 1 millisecond and are typically about 18 angstroms in total amplitude.