The temporal dynamics of visual processing in multiple sclerosis

Silvana Lopes Costa, Oscar F Gonçalves, John DeLuca, Nancy Chiaravalloti, Ramakrishna Chakravarthi, Jorge Almeida

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Although the integrity of the visual system is often affected in multiple sclerosis (MS), the potential relationship between the temporal dynamics of visual processing and performance on neuropsychological tests assessing processing speed (PS) remains relatively unexplored. Here, we test if a PS deficit is related to abnormalities within the visual system, rather than impaired higher-level cognitive function. Two groups of participants with MS (1 group with PS deficits and another without) and a healthy control group, matched for age and education, were included. To explore the temporal dynamics of visual processing, we used 2 psychophysical paradigms: attention enhancement/prioritization and rapid serial visual presentation. Visual PS deficits were associated with a decreased capability to detect visual stimuli and a higher limitation in visual temporal-processing capacity. These results suggest that a latent sensorial temporal limitation of the visual system is significantly associated to PS deficits in MS.

Original languageEnglish
Pages (from-to)133-140
Number of pages8
JournalApplied Neuropsychology. Adult
Volume23
Issue number2
Early online date27 Oct 2015
DOIs
Publication statusPublished - 2016

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Keywords

  • Multiple sclerosis
  • processing speed
  • visual system

Cite this

Lopes Costa, S., Gonçalves, O. F., DeLuca, J., Chiaravalloti, N., Chakravarthi, R., & Almeida, J. (2016). The temporal dynamics of visual processing in multiple sclerosis. Applied Neuropsychology. Adult, 23(2), 133-140. https://doi.org/10.1080/23279095.2015.1020157