Validation of the Filling Factor Index to Study the Filling Process of the Semg Signal in the Quadriceps

• DOI: 10.2139/ssrn.4494624
• Publication Date: 2023-07-12T00:18:27Z
• Authors: Javier Rodriguez-...; Armando Malanda; Cristina Mariscal; Imran Khan Niazi; Javier Navallas
• Keywords: Factor (programming language); SIGNAL (programming language)

Introduction: The EMG filling factor is an index to quantify the degree which signal has been filled. Here, we tested validity of such analyse process as contraction force was slowly increased. Methods: Surface signals were recorded from quadriceps muscles healthy subjects gradually increased 0 40% MVC. sEMG analyzed by measuring (calculated non-central moments rectified sEMG). Results: (1) As increased, one or two prominent abrupt jumps in amplitude appeared between and 10% MVC all vastus lateralis medialis.(2) originated when a few large-amplitude MUPs, clearly standing out previous activity, signal.(3) Every time jump occurred, new stage initiated.(4) almost completely filled at 2-12% MVC.(5) decreased significantly upon occurrence jump, additional MUPs added signal.(6) curve highly repeatable across repetitions. Conclusions: It validated that useful, reliable tool process. muscles, occurred stages due presence amplitude.