Modelling of compound nerve action potentials health and disease

This paper reports the results of application of Murthy-Prasad technique in extracting the principal component from compound nerve action potentials (CNAP). The DCT of the CNAP is pole zero modelled using the Steiglitz-McBride method. This model is expanded into a set of partial fractions each of order (2,2). The sum of the monophasic functions recovered from the relevant fractions in the inverse process gives the major potential in the response. In the case of patients´ responses, this improves the main component by rejecting the smaller peaks due to dispersion by demyelination. The technique works well in waveforms deformed moderately. The iaproved waveshape is extremely useful in cases where the original waveshape prevents the exact location of arrival of nerve impulse.