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Temporal visual resolution and disease severity in MS

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Item Type:Article
Title:Temporal visual resolution and disease severity in MS
Creators Name:Ayadi, N. and Dörr, J. and Motamedi, S. and Gawlik, K. and Bellmann-Strobl, J. and Mikolajczak, J. and Brandt, A.U. and Zimmermann, H. and Paul, F.
Abstract:OBJECTIVE: To examine temporal visual resolution assessed as critical flicker frequency (CFF) in patients with MS and to investigate associations with visual system damage and general disability and cognitive function. METHODS: Thirty-nine patients with MS and 31 healthy controls (HCs) were enrolled in this cross-sectional study and underwent CFF testing, high- and low-contrast visual acuity, alertness and information processing speed using the paced auditory serial addition task (PASAT), and retinal optical coherence tomography (OCT). In patients with MS, visual evoked potentials (VEPs) and Expanded Disability Status Scale (EDSS) scores were assessed. RESULTS: CFF in patients with MS (mean ± SD: 40.9 ± 4.4 Hz) was lower than in HCs (44.8 ± 4.4 Hz, p < 0.001). There was no significant CFF difference between eyes with and without previous optic neuritis (ON). CFF was not associated with visual acuity, VEP latency, the peripapillary retinal nerve fiber layer thickness, and the combined ganglion cell and inner plexiform layer volume. Instead, reduced CFF was associated with worse EDSS scores (r(2) = 0.26, p < 0.001) and alertness (r(2) = 0.42, p = 0.00042) but not with PASAT (p = 0.33). CONCLUSION: CFF reduction in MS occurs independently of ON and structural visual system damage. Its association with the EDSS score and alertness suggests that CFF reflects global disease processes and higher cortical processing rather than focal optic nerve or retinal damage.
Source:Neurology Neuroimmunology & Neuroinflammation
Publisher:American Academy of Neurology
Page Range:e492
Date:1 September 2018
Official Publication:https://doi.org/10.1212/NXI.0000000000000492
PubMed:View item in PubMed

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