ArticleNeurourology and urodynamics2018
Innervation asymmetry of the external anal sphincter in aging characterized from high-density intra-rectal surface EMG recordings.
Article in Neurourology and urodynamics, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Muscle innervation zone estimation from monopolar high-density M-waves using principal component analysis and radon transform.Frontiers in physiology · 2023Article
- Research and application advances in rehabilitation assessment of stroke.Journal of Zhejiang University. Science. B · 2022Review
- High-density surface electromyographic assessment of pelvic floor hypertonicity in IC/BPS patients: a pilot study.International urogynecology journal · 2021Article
- Characterization of Pelvic Floor Activity in Healthy Subjects and with Chronic Pelvic Pain: Diagnostic Potential of Surface Electromyography.Sensors (Basel, Switzerland) · 2021Article
- The influence of common component on myoelectric pattern recognition.The Journal of international medical research · 2020Article
- Global Innervation Zone Identification With High-Density Surface Electromyography.IEEE transactions on bio-medical engineering · 2020Article
- A Preliminary Study of Effects of Channel Number and Location on the Repeatability of Motor Unit Number Index (MUNIX).Frontiers in neurology · 2020Article
- Neural control properties of the external anal sphincter in young and elderly women.Neurourology and urodynamics · 2019Article
- Three dimensional innervation zone imaging in spastic muscles of stroke survivors.Journal of neural engineering · 2019Article
- Effects of delivery mode and age on motor unit properties of the external anal sphincter in women.International urogynecology journal · 2019Article
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Authors and funding
4 authors.
Funding
Abstract
aimsThe innervation zone asymmetry of the external anal sphincter (EAS) has been investigated as a risk factor for the development of fecal incontinence (FI). This study aims to utilize an intra-rectal high-density surface electromyogram (HD-sEMG) recording and advanced HD-sEMG decomposition technique to characterize the effects of aging on the asymmetry of EAS functional innervation.
methodsHD-sEMG signals were recorded intra-rectally from six healthy young and seven healthy elderly women during voluntary contractions of the EAS. EMG signals were decomposed into constituent motor unit action potentials (MUAPs) and the innervation zone of each decomposed motor unit was identified. Asymmetry index (AI) was defined and calculated for all subjects. The maximum squeezing pressures of the EAS were also measured for all subjects as a comparison.
resultsThe HD-sEMG decomposition and AI calculation were successfully performed from EMG data acquired from all the subjects. The AI values were 28.7 ± 17.0% for the young group and 55.6 ± 18.8% for the elderly group. The AI and EAS contraction strength were found to be negatively correlated (P < 0.05). A two-tailed student's t-test demonstrated a significant increase in AI with age by comparison between two groups (P < 0.05).
conclusionsOur work demonstrates, for the first time, that EAS functional innervation tends to become increasingly asymmetrical with advancing age, and this increase is associated with a compromised anorectal function. Results suggest that the intra-rectal HD-sEMG will serve as an advanced tool for assessing and monitoring the anorectal neuromuscular function minimally invasively under different pathophysiological conditions.
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