Andreassen

Binnie

Enck

Farina

Fuglevand

Gazzoni

Merletti

O’Donnell

Rosenfalck

Wietek

English

Crossref

Automatic localisation of innervation zones: A simulation study of the external anal sphincter

Mesin, Luca

Gazzoni, Marco

Merletti, Roberto

PORTO Publications Open Repository TOrino

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Wavelet Analysis and its Applications; volume 1: An Introduction to Wavelet, Academic Press:

Automatic localisation of innervation zones: a simulation study of the external anal sphincter

Traumas of the innervation zone (IZ) of the external anal sphincter (EAS), e.g. during delivery, can promote the development of faecal incontinence. Recently developed probes allow high-resolution detection
of EMG signals from the EAS. The analysis of pelvic floor muscles by surface EMG (in particular, the estimation of the location of the IZ) has potential applications in the diagnosis and investigation of the mechanisms of incontinence.
An automatic method (based on matched filter approach) for the estimation of the IZ distribution of
EAS from surface EMG is discussed and tested using an analytical model of generation of EMG signals
from sphincter muscles. Simulations are performed varying length of the fibres, thickness of the mucosa,
position of the motor units, and force level. Different distributions of IZs are simulated.
The performance of the proposed method in the estimation of the IZ distribution is affected by surface
MUAP amplitude (as the estimation made by visual inspection), by mucosa thickness (performance
decreases when fibre length is higher) and by different MU distributions. However, in general the method
is able to identify the position of two IZ locations and can measure asymmetry of the IZ distribution. This
strengthens the potential applications of high density surface EMG in the prevention and investigation of
incontinence

MESIN, LUCA

GAZZONI, MARCO

MERLETTI, Roberto

PORTO@iris (Publications Open Repository TOrino - Politecnico di Torino)

Automatic localisation of innervation zones: a simulation study of the external anal sphincter

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PORTO Publications Open Repository TOrino

PORTO@iris (Publications Open Repository TOrino - Politecnico di Torino)