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A neurogenic factor in faecal incontinence in the elderly
Age and Ageing
|August 1, 1982
Summary
Faecal incontinence in older adults may stem from age-related nerve damage to the anal sphincter. This study found increased fiber density in incontinent elderly patients, suggesting reduced muscle function.
Area of Science:
- Gerontology
- Neuroscience
- Gastroenterology
Background:
- Idiopathic fecal incontinence (FI) in middle-aged individuals is linked to neurogenic damage of the anal sphincter.
- Skeletal muscle neurogenic atrophy is a common aspect of aging.
Purpose of the Study:
- To investigate if age-related denervation of the anal sphincter musculature contributes to fecal incontinence in the elderly.
Main Methods:
- Single fiber electromyography (sEMG) was employed.
- Motor unit fiber density was measured in the external and internal anal sphincter muscles.
- Ten patients aged 78-99 years with impaired continence were studied.
Main Results:
- Patients with impaired continence exhibited markedly increased fiber density.
- This suggests significant neurogenic damage to the anal sphincter musculature in elderly individuals with FI.
Conclusions:
- Age-related denervation may reduce the functional reserve of the anal sphincter.
- This reduction can lead to incontinence, especially when co-existing factors like stool looseness or cognitive impairment are present.