Pudendal nerve somatosensory evoked potentials in probable multiple sclerosis

Area of Science:

• Neuroscience
• Urology
• Clinical Neurology

Background:

• Bladder dysfunction is a common complication in multiple sclerosis (MS).
• Identifying early neurological changes in bladder control pathways is crucial for patient management.
• Subclinical bladder abnormalities can precede overt symptoms in MS.

Purpose of the Study:

• To assess the diagnostic utility of pudendal nerve somatosensory evoked potentials (pSEPs) in detecting bladder control pathway abnormalities in MS patients.
• To correlate pSEP findings with urodynamic results in individuals with and without symptomatic bladder dysfunction.
• To investigate the prevalence of subclinical bladder pathway involvement in clinically probable MS.

Main Methods:

• Recording of pudendal nerve somatosensory evoked potentials (pSEPs) in 16 patients with clinically probable MS.
• Inclusion of both symptomatic (retention/urge incontinence) and asymptomatic individuals.
• Performance of conventional visual, auditory, and somatosensory evoked potentials, alongside urodynamic examinations.

Main Results:

• Abnormal pSEP cortical responses (prolonged latency or absence) were observed in 87.5% of all MS patients (14 out of 16).
• Specifically, 80% of asymptomatic patients (8 out of 10) and 100% of symptomatic patients showed pSEP abnormalities.
• Urodynamic evaluation identified abnormalities in 75% of the patients (12 out of 16).

Conclusions:

• pSEPs are highly sensitive in detecting early and subclinical involvement of bladder central control pathways in MS.
• These findings suggest a high incidence of neurological bladder dysfunction in MS, often preceding clinical symptoms.
• pSEPs offer a valuable tool for early diagnosis and monitoring of bladder disturbances in multiple sclerosis.