Do I understand correctly that the polyphasia of myopathic MUP is a consequence of the increase in the variability of muscle fibre diameters? And the different diameters lead to different conduction velocities in the respective muscle fibre? Is this one of the reasons why MUP should not be registered from the endplate region?
Yes you are absolutely correct. And in addition, signals at the end-plate zone do not have the positive going "arriving phase", they start abruptly in negative direction, so the duration is cut into "half", or at least become shorter than signals recorded a few cm downstream
Do I understand correctly that the polyphasia of myopathic MUP is a consequence of the increase in the variability of muscle fibre diameters? And the different diameters lead to different conduction velocities in the respective muscle fibre?
Is this one of the reasons why MUP should not be registered from the endplate region?
Yes you are absolutely correct. And in addition, signals at the end-plate zone do not have the positive going "arriving phase", they start abruptly in negative direction, so the duration is cut into "half", or at least become shorter than signals recorded a few cm downstream