Analysis of motor unit synchronization using joint peri-stimulus time histograms in human-simulation analysis

For assessing human motor unit synchronization, we develop a novel synchronization index, /spl beta/ using joint peri-stimulus time histogram. In this paper, we discuss the dependence of the synchronization index on firing rates and the ability of temporal analysis using a spike model. We confirmed that the index /spl beta/ represents the synchronization state independently from firing rates, and that it also accurately traces event-related temporal modulation of synchronization.