Functional Brain Imaging and the Neural Basis for Voiding Dysfunction in Older Adults.

Area of Science:

• Neuroscience
• Gerontology
• Urology

Background:

• Urinary dysfunction, including overactive bladder and urge incontinence, is common in older individuals.
• Brain abnormalities are increasingly recognized as a contributing factor to these conditions.
• Existing treatments often focus solely on the bladder, potentially missing central nervous system contributions.

Purpose of the Study:

• To investigate the neural circuits involved in controlling micturition (urinary voiding).
• To explore the relationship between brain structural changes (white matter hyperintensities) and urinary incontinence severity.
• To propose that therapies addressing brain abnormalities may enhance treatment efficacy for urinary dysfunction.

Main Methods:

• Utilized functional brain imaging to identify neural circuits controlling voiding.
• Examined the association between age-related white matter hyperintensities and urge incontinence.
• Assessed changes in brain function related to urinary dysfunction.

Main Results:

• Identified three independent neural circuits (frontal, midcingulate, subcortical) that suppress the brainstem voiding reflex.
• Found that white matter hyperintensities, which increase with age, correlate with urge incontinence severity.
• Observed alterations in brain function linked to urinary incontinence.

Conclusions:

• Brain structural and functional abnormalities are implicated in age-related urinary dysfunction.
• Damage to neural pathways connecting key brain circuits contributes to urge incontinence.
• Multicomponent therapies targeting central neural mechanisms may offer a more effective approach to managing overactive bladder and incontinence.