[EN] Chronic pelvic pain (CPP) is a complex clinical condition that
affects many women, being sometimes misdiagnosed or
mistreated,which can be treated with the infiltration of botulinum
toxin (BoNTA). The pelvic floor musculature (PFM) condition
from CPP patients can be assessed by means of surface
electromyography (sEMG). The evaluation of the basal activity
can help to detect a muscular dysfunction, therefore it is
important to ensure that the PFM shows a minimum activation
when its sEMG is being analysed. In this study, we recorded the
sEMG of 25 women with CPP before and 8, 12 and 24 weeks after
their treatment with BoNTA while they performed a protocol of 5
voluntary contractions. The root mean square (RMS) and sample
entropy (SampEn) of basal segments pre- (B[PRE]), inter- (B[I])
and post- (B[POST]) contractions of the sEMG were computed
and normalized according to the minimum (RMSnorm) and
maximum (SampEnorm) of the recording. B(PRE) showed the
lowest RMSnorm median both before and after the treatment with
BoNTA, which proved that the activity of the PFM is minimum
before the first contraction. As for SampEnnorm, although results
were not so conclusive, they also indicated that B(PRE) should
be taken as a reference to analyse the PFM function at its state of
minimum activity. Future works aiming to characterize the effects
of BoNTA in PFM by means of sEMG should consider basal
segments before contractions to assess basal tone conditions.This study was funded by ISCIII, MCIU, VLC Campus in
Convocatoria Ayudas: UPV-La Fe (INBIO): 2016 SPEHG
(ID:C18), 2019 sEMG_BONTAv (ID:C06) and with funds
from private contracts with Merz Pharma España S.L.Albaladejo-Belmonte, M.; Tarazona-Motes, M.; Nohales-Alfonso, FJ.; Alberola-Rubio, J.; Garcia-Casado, J. (2020). Influence of voluntary contractions on the basal sEMG activity of the pelvic floor muscles. Sociedad Española de Ingeniería Biomédica. 240-243. http://hdl.handle.net/10251/178256S24024