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Updated: May 21, 2026
Visual Evoked Potential Recording in a Rat Model of Experimental Optic Nerve Demyelination
Published on: July 29, 2015
CSF abnormalities can be predicted by VEP and MRI pathology in the examination of optic neuritis
Henrik Horwitz1, Matilda Degn, Signe Modvig
1Department of Neurology, Glostrup Hospital, University of Copenhagen, Copenhagen, Denmark. henrik_horwitz@hotmail.com
Abstract:
Optic neuritis (ON) is linked to multiple sclerosis (MS). The presence of white matter lesions on cerebral magnetic resonance imaging (MRI) predicts the risk of MS after ON with considerable accuracy. Oligoclonal bands (OCB) are present in 95 % of MS patients, and a lumbar puncture can also be valuable in the evaluation of patients with ON. We analyzed CSF findings in patients referred with ON in the context of MRI and visual evoked potential (VEP) pathology. We assessed the possible contributory role of a lumbar puncture and weigh this against disadvantages of the procedure. Between February 2003 and November 2011, 505 patients were referred by ophthalmologists to the Clinic of Optic Neuritis, Glostrup Hospital, University of Copenhagen. None had MS prior to referral. A total of 437 were included in the study, and all underwent MRI, a lumbar puncture and VEP. Patients with other organic causes of their symptoms and patients with >3 months between onset and tests were excluded. All files were reviewed retrospectively. CSF leukocytes and the IgG index were elevated in 33 and 41 %, respectively, and OCBs were detected in 61 % of patients. CSF abnormalities correlated strongly with VEP and MRI (p < 0.0001). Patients with normal VEP and MRI had a 96 % probability of a normal lumbar puncture. The contributory role of a lumbar puncture in the evaluation of ON seems negligible when patients have a normal VEP and MRI. We suggest that all patients should be evaluated with VEP and MRI before deciding on a lumbar puncture.
Insights
Optic neuritis (ON) evaluation can be streamlined. Lumbar puncture is often unnecessary when MRI and visual evoked potentials (VEP) are normal, improving diagnostic efficiency for patients at risk of multiple sclerosis (MS).
Area of Science:
- Neuroscience
- Ophthalmology
- Neurology
Background:
- Optic neuritis (ON) is a significant risk factor for developing multiple sclerosis (MS).
- Cerebral MRI and cerebrospinal fluid (CSF) analysis, including oligoclonal bands (OCB), are key diagnostic tools.
- Visual evoked potentials (VEP) assess visual pathway function.
Purpose of the Study:
- To evaluate the diagnostic utility of lumbar puncture in patients with optic neuritis.
- To determine if CSF analysis is necessary when MRI and VEP findings are normal.
- To assess the correlation between CSF abnormalities and neuroimaging/electrophysiology in ON.
Main Methods:
- Retrospective analysis of 505 patients referred for optic neuritis.
- Included 437 patients who underwent MRI, lumbar puncture, and VEP.
- Excluded patients with prior MS or delayed testing (>3 months).
Main Results:
- CSF abnormalities (leukocytes, IgG index, OCBs) were found in a significant proportion of patients.
- CSF abnormalities strongly correlated with abnormal VEP and MRI findings (p < 0.0001).
- Patients with normal VEP and MRI had a 96% probability of normal CSF findings.
Conclusions:
- Lumbar puncture offers minimal additional diagnostic value in optic neuritis when VEP and MRI are normal.
- Routine lumbar puncture may not be necessary in all ON cases.
- Prioritize VEP and MRI for initial ON evaluation before considering lumbar puncture.
