Abstract
Prior studies have reported an association between visual evoked potentials (VEPs) and cognitive performance in people with multiple sclerosis (PwMS), but the specific mechanisms that account for this relationship remain unclear. We examined the relationship between VEP latency and cognitive performance in a large sample of PwMS, hypothesizing that VEP latency indexes not only visual system functioning but also general neural efficiency. Standardized performance index scores were obtained for the domains of memory, executive function, visual-spatial processing, verbal function, attention, information processing speed, and motor skills, as well as global cognitive performance (NeuroTrax battery). VEP P100 component latency was obtained using a standard checkerboard pattern-reversal paradigm. Prolonged VEP latency was significantly associated with poorer performance in multiple cognitive domains, and with the number of cognitive domains in which performance was ≥ 1 SD below the normative mean. Relationships between VEP latency and cognitive performance were significant for information processing speed, executive function, attention, motor skills, and global cognitive performance after controlling for disease duration, visual acuity, and inter-ocular latency differences. This study provides evidence that VEP latency delays index general neural inefficiency that is associated with cognitive disturbances in PwMS.
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Glen M. Doniger is an employee of NeuroTrax Corporation. The authors declare no other potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
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Covey, T.J., Golan, D., Doniger, G.M. et al. Visual evoked potential latency predicts cognitive function in people with multiple sclerosis. J Neurol 268, 4311–4320 (2021). https://doi.org/10.1007/s00415-021-10561-2
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DOI: https://doi.org/10.1007/s00415-021-10561-2