The utility of multimodal evoked potentials in multiple sclerosis prognostication

Area of Science:

• Neuroscience
• Clinical Neurology
• Biomarker Research

Background:

• Predicting disability progression in multiple sclerosis (MS) remains challenging.
• Evoked potentials (EP) show promise as prognostic indicators, but their utility needs further clarification.

Purpose of the Study:

• To assess the prognostic value of multimodal evoked potentials (EP) for disability development in a diverse cohort of MS patients.
• To evaluate a novel combined EP score (CEPS) as a biomarker for MS disability.

Main Methods:

• Sixty-three MS patients underwent multimodal EP testing (somatosensory, visual, brainstem auditory) at baseline.
• A combined EP score (CEPS) was calculated based on the number of abnormal EP tests.
• Patients were followed for an average of 2 years, with disability assessed using the Expanded Disability Status Scale (EDSS).

Main Results:

• Multimodal EP abnormalities significantly correlated with both baseline and follow-up EDSS scores.
• Specific EP latencies (tibial nerve P37, median nerve N13/N20, visual P100) showed significant correlations with EDSS.
• The combined EP score (CEPS) demonstrated a strong correlation with EDSS (R=0.65 at baseline, R=0.57 at follow-up).
• T2 lesion load showed a weaker correlation with EDSS compared to CEPS.

Conclusions:

• Abnormalities in evoked potentials, quantified by the CEPS, serve as a valuable biomarker for predicting clinical disability in MS.
• The CEPS may enhance the quantification of MS disease severity and assist in therapeutic decision-making.