
Fig. 33. Comparison between the action potentials of human motor nerve fi bres in
the normal, ISD (a), PSD (b) and PISD (c) cases without aqueous layers presented
by dotted lines and those with aqueous layers presented by continuous lines. The
potentials are given at 10th node only. The data show that aqueous layers in the
89% demyelinated case (PSD4) restore action potential propagation, which is
initially blocked when aqueous layers are not taken into account.
Effect of Myelin Sheath Aqueous Layers on the Excitability Properties 99