The correlation between cerebrospinal fluid findings and evoked potentials during an acute MS attack

Area of Science:

• Neuroscience
• Immunology
• Clinical Neurology

Background:

• Multiple Sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system.
• Evoked potentials (EPs) assess the integrity of sensory pathways, with abnormalities suggesting neurological damage.
• Cerebrospinal fluid (CSF) analysis, including immunoglobulin G (IgG) index and oligoclonal bands, aids in MS diagnosis and monitoring.

Purpose of the Study:

• To investigate the correlation between CSF findings and evoked potential abnormalities in patients with clinically definite Multiple Sclerosis during acute attacks.
• To determine if specific CSF biomarkers are associated with particular patterns of evoked potential dysfunction.

Main Methods:

• A cohort of 20 patients (10 male, 10 female, mean age 37.75) diagnosed with definite MS were studied during an acute relapse.
• CSF samples were analyzed for IgG index and oligoclonal bands.
• Evoked potentials, including visual (VEP), brainstem auditory (BAEP), and somatosensory (SEP), were performed.

Main Results:

• During acute attacks, 50% of patients had an elevated IgG index, and 10% showed oligoclonal band positivity.
• Among patients with a high IgG index, 80% exhibited evoked potential pathology, primarily in VEP and BAEP, with prolonged latencies.
• A positive correlation was observed between increased IgG index and prolonged VEP/BAEP latencies (p < 0.05), but not with SEP parameters.

Conclusions:

• Elevated CSF IgG index during acute MS attacks is associated with significant evoked potential abnormalities, particularly affecting visual and auditory pathways.
• These findings suggest that CSF IgG levels may serve as a biomarker for the extent of neurological pathway involvement during MS relapses.
• Further research is warranted to explore the relationship between SEP parameters and CSF findings in MS.