Is Motor Unit Number Index (MUNIX) an index of Compound Muscle Action Potential amplitude rather than motor unit number?

Is Motor Unit Number Index (MUNIX) an index of Compound Muscle Action Potential amplitude rather than motor unit number? Clin Neurophysiol. 2019 Jul 04;: Authors: Moldovan M, Vucic S PMID: 31303432 [PubMed - as supplied by publisher]
Source: Clinical Neurophysiology - Category: Neurology Authors: Tags: Clin Neurophysiol Source Type: research