Abstract：
STUDY DESIGN:Cross-sectional study. OBJECTIVES:To investigate the attentional requirements for maintaining standing balance in people with spinal cord injury (SCI) using a dual-task paradigm and to compare standing balance performance between SCI and able-bodied (AB) controls. SETTING:LaboratoryMethods:Nine adults with incomplete SCI, who were able to stand unassisted were recruited, along with eight AB controls. Subjects performed a dual task involving counting backwards by 3 s out loud while standing with eyes open or closed. The primary outcome measures were the differences between SCI and control groups for movement reinvestment and the change in performance between single task and dual task for: (i) maximum standing time (STime); (ii) error ratio and total number of words uttered; and (iii) center of pressure measures. Perceptual measures included perceived mental workload, fear and confidence. RESULTS:SCI subjects stood for shorter duration during dual task (stand and count) than single task (stand) compared with controls during eyes closed. Significant differences between groups were observed for movement reinvestment, center of pressure, perceived mental effort, fear and confidence. No significant effects were observed for math-task performance. CONCLUSIONS:Total STime during eyes closed is adversely affected by the addition of a math task for SCI subjects. Perceptual measures appear to correspond to increases in postural sway and conscious control of standing in subjects with SCI. Individuals who can stand for >60 s with eyes closed do not appear to be significantly affected by the addition of a concurrent secondary task of minimal mental workload.
journal_name
Spinal Cordjournal_title
Spinal cordauthors
Tse CM,Carpenter MG,Liu-Ambrose T,Chisholm AE,Lam Tdoi
10.1038/sc.2017.42subject
Has Abstractpub_date
2017-10-01 00:00:00pages
915-920issue
10eissn
1362-4393issn
1476-5624pii
sc201742journal_volume
55pub_type
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