Cognitive impairment and event-related potentials in paediatric multiple sclerosis: 2-year study

Area of Science:

• Neuroscience
• Pediatric Neurology
• Clinical Neurophysiology

Background:

• Multiple sclerosis (MS) onset before 18 years affects 3-10% of patients.
• Cognitive impairment is a significant concern in pediatric MS, but its neurophysiological basis is understudied.
• Event-related potentials (ERPs) offer a potential window into brain function.

Purpose of the Study:

• To investigate the relationship between event-related potentials (ERPs) and cognitive performance in pediatric MS patients.
• To compare neurophysiological correlates of cognition in children and adolescents with MS versus healthy controls (HC).
• To provide two-year follow-up data on cognitive and neurophysiological changes.

Main Methods:

• Assessed six pediatric MS patients (ages 9-17) using a comprehensive neuropsychological battery at two time points.
• Recorded event-related potentials (ERPs) using an odd-ball acoustic paradigm in patients and nine HC.
• Classified patients as cognitively impaired based on performance on multiple cognitive tasks.

Main Results:

• At baseline, 4/6 pediatric MS patients were cognitively impaired, showing abnormal P300 latencies and amplitudes.
• After two years, 5/6 patients showed cognitive deterioration, paralleled by worsening P300 parameters.
• Abnormal P300 findings correlated with cognitive deficits in pediatric MS.

Conclusions:

• Changes in P300 parameters in pediatric MS patients occur in parallel with cognitive performance decline.
• The P300 component of event-related potentials may serve as an objective biomarker for monitoring cognitive changes in pediatric MS.
• Further research is warranted to validate P300 as a clinical tool for pediatric MS management.