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 language | English |
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Pages (from-to) | 133-140 |
Number of pages | 8 |
Journal | Applied Neuropsychology. Adult |
Volume | 23 |
Issue number | 2 |
Early online date | 27 Oct 2015 |
DOIs | |
Publication status | Published - 2016 |
Bibliographical note
FundingThis work was supported by the Foundation for Science and
Technology of Portugal with a doctoral fellowship grant
(No. SFRH/BD/455591/2008) to SLC. JA is supported by
funding from the Foundation for Science and Technology of
Portugal Project Grants PTDC/PSI-PCO/114822/2009 and
PTDC/MHC-PCN/3575/2012.
Keywords
- Multiple sclerosis
- processing speed
- visual system