I didn't receive any replies to this question; in the hope that any
interested parties may still have been away on holidays, I'm posting
it again.

> I find myself needing a mathematical rule for determining the 'end'
> of a motor unit action potential. For example, I could arbitrarily
> decide that a pulse is effectively over when, on its final phase, the
> amplitude has fallen to 1% of the peak-to-peak amplitude.
> Is there a standard definition which has received general acceptance
> among EMG researchers?