An analysis of extracellular single muscle fibre action potential field--modelling results.

The radial variability of extracellular single muscle fibre action potential (SFAP) field was studied on the basis of an SFAP theoretical model originally constructed by Rosenfalck (1969). Amplitude and time parameters of the SFAP as a function of the radial distance r less than or equal to 10 mm from the fibre were described by simple mathematical expressions. The results obtained were compared with existing experimental data from different authors and discussed in detail.