Effects of aging on the relationship between cognitive demand and step variability during dual-task walking.
A U-shaped relationship between cognitive demand and gait control may exist in dual-task situations, reflecting opposing effects of external focus of attention and attentional resource competition. The purpose of the study was twofold: to examine whether gait control, as evaluated from step-to-step...
| Publicado en: | Age (0161-9152) Vol. 38; no. 4; pp. 363 - 376 |
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| Autores principales: | , , , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Aug2016
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=118729719&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 118729719 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01619152 2ZT0 jtl: Age (0161-9152) issn: 01619152 maglogo: N pubinfo: dt: Aug2016 vid: 38 iid: 4 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 118729719 143992444 10.1007/s11357-016-9941-y 118729719 ppf: 363 ppct: 13 formats: fmt: @attributes: type: P tig: atl: Effects of aging on the relationship between cognitive demand and step variability during dual-task walking. aug: au: Decker, Leslie Cignetti, Fabien Hunt, Nathaniel Potter, Jane Stergiou, Nicholas Studenski, Stephanie affil: UMR 7291 CNRS and Aix-Marseille Université , 3 place Victor-Hugo 13331 Marseille Cedex 3 France sug: ab: A U-shaped relationship between cognitive demand and gait control may exist in dual-task situations, reflecting opposing effects of external focus of attention and attentional resource competition. The purpose of the study was twofold: to examine whether gait control, as evaluated from step-to-step variability, is related to cognitive task difficulty in a U-shaped manner and to determine whether age modifies this relationship. Young and older adults walked on a treadmill without attentional requirement and while performing a dichotic listening task under three attention conditions: non-forced (NF), forced-right (FR), and forced-left (FL). The conditions increased in their attentional demand and requirement for inhibitory control. Gait control was evaluated by the variability of step parameters related to balance control (step width) and rhythmic stepping pattern (step length and step time). A U-shaped relationship was found for step width variability in both young and older adults and for step time variability in older adults only. Cognitive performance during dual tasking was maintained in both young and older adults. The U-shaped relationship, which presumably results from a trade-off between an external focus of attention and competition for attentional resources, implies that higher-level cognitive processes are involved in walking in young and older adults. Specifically, while these processes are initially involved only in the control of (lateral) balance during gait, they become necessary for the control of (fore-aft) rhythmic stepping pattern in older adults, suggesting that attentional resources turn out to be needed in all facets of walking with aging. Finally, despite the cognitive resources required by walking, both young and older adults spontaneously adopted a 'posture second' strategy, prioritizing the cognitive task over the gait task. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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