Static Images for use with Minimovies

Right-clicking these images (control-clicking on the Mac) should give you an option to download them.
[go back]

Stimulus current threshold for generation of an action potential

Voltage traces showing the stimulus current threshold for generating an action potential — Static image for Movie 1:

Voltage traces at a second stimulus amplitude, showing threshold for generating an action potential — Static image for Movie 2:

Impulse propagation in a small squid axon

The movie was made with an axon diameter of 50µm to show more of the impulse waveform within the 10mm length. The location of the stimulus and the color-coded recording electrodes in the movie are shown below.

A squid axon with the stimulating electrode and colour-coded recording electrodes marked along its length

Colour-coded voltage traces of an action potential travelling along a 50 micrometre unmyelinated axon — Static image for AP traveling in a 50µm diameter unmyelinated axon

Impulse propagation in a myelinated axon

The location of the stimulus at node [0] and the color-coded recording electrodes in the movie are shown below at the nodes of a myelinated axon.

A myelinated axon with the stimulating electrode at node 0 and colour-coded recording electrodes at successive nodes

Colour-coded voltage traces of an action potential travelling along a myelinated axon — Static image for AP traveling in a myelinated axon