Cognitive motor interference during walking in multiple sclerosis using an alternate-letter alphabet task

To examine cognitive motor interference (CMI) during walking using a simple, standardized, and well-refined alphabet dual-task (DT) paradigm in individuals with multiple sclerosis (MS) in whom cognitive and walking impairment often co-occur. A single time point, cross-sectional study. A university c...

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Vydáno v:Archives of physical medicine and rehabilitation Ročník 95; číslo 8; s. 1498
Hlavní autoři: Learmonth, Yvonne C, Sandroff, Brian M, Pilutti, Lara A, Klaren, Rachel E, Ensari, Ipek, Riskin, Barry J, Holtzer, Roee, Motl, Robert W
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States 01.08.2014
Témata:
Adult
Cognition - physiology
Exercise Test
Female
Gait - physiology
Humans
Male
Middle Aged
Multiple Sclerosis - physiopathology
Psychomotor Performance
Walking - physiology
Walking - psychology
Multiple sclerosis
Cognition
Rehabilitation
ISSN:1532-821X, 1532-821X
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Shrnutí:To examine cognitive motor interference (CMI) during walking using a simple, standardized, and well-refined alphabet dual-task (DT) paradigm in individuals with multiple sclerosis (MS) in whom cognitive and walking impairment often co-occur. A single time point, cross-sectional study. A university clinical laboratory. Individuals with MS (N=61; mean age ± SD, 50.8±9.3 y) performed 4 walking trials over a 4.6-m walkway to determine gait parameters. Not applicable. Gait parameters were assessed over 4 walking trials. The first 2 walks involved the single task (ST) of walking only; the second 2 walks involved participants performing the DT of reciting alternate letters of the alphabet while walking. The gait parameters recorded during the ST and DT walks were used to compute a dual-task cost (DTC) of walking (% change in gait parameter between ST and DT walks) as a metric of CMI. Our multivariate analysis with univariate follow-ups indicated CMI during walking based on slower velocity (ηp(2)=.59; F=84.6; P<.001) and cadence (ηp(2)=.46; F=51.6; P<.001), shorter step length (ηp(2)=.38; F=36; P<.001), and increased step time (ηp(2)=.34; F=31; P<.001) and double-support time (ηp(2)=.31; F=27.3; P<.001) in DT versus ST conditions. The DTC of walking for the gait parameters was not correlated with clinical (disability, disease duration) and demographic (eg, education, age) factors (all |r|≤.240). The alphabet DT paradigm is easily administered and well refined. We highlight its ability and acceptability to determine CMI during walking in people with MS, independent of disease status.
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ISSN:1532-821X
1532-821X
DOI:10.1016/j.apmr.2014.03.007