Abstract:
:This study aimed to examine the effect of explicit cuing on reactive stepping with the paretic limb during slip-like perturbations in stroke survivors and to identify differences in postural stability and fall-risk while stepping with either limb. Eleven chronic hemiparetic stroke survivors received slip-like stance perturbations in no-cue (implicit, no instructions) and cued (explicit, instructions to step with paretic limb) conditions. Frequency of stepping with the paretic limb was recorded. Differences between non-paretic and paretic steps for falls, number of compensatory steps, relative center-of-mass position (X COM/BOS), and velocity (Ẋ(COM/BOS)), and vertical limb support (hip descent-Z hip) were analyzed. Stepping with the paretic limb increased from 6% in no-cue condition to 42% in cued condition with no significant difference in number of falls and steps regardless of stepping limb. At liftoff of the compensatory step, stability was greater (anterior X COM/BOS) with paretic than non-paretic limb stepping whereas, at touchdown (TD) of the step, stability with paretic limb reduced (posterior X COM/BOS and Ẋ(COM/BOS)) due to a smaller compensatory step taken with the paretic versus non-paretic limb. There was no significant difference in peak Z hip regardless of stepping limb; however, the timing of peak Z hip differed (occuring prior to TD during non-paretic stepping and post-TD during paretic stepping). Thus, fall onset was earlier with non-paretic versus paretic stepping. The results support that explicit cueing can facilitate initiation of reactive step from the paretic limb as compared with the no-cue condition. Stepping with the paretic limb in the cued condition however altered time of fall onset. Regardless of the stepping side, individuals demonstrated a fall risk suggesting the need for interventions focusing on reactive step training with both the limbs.
journal_name
Exp Brain Resjournal_title
Experimental brain researchauthors
Patel P,Bhatt Tdoi
10.1007/s00221-015-4367-9subject
Has Abstractpub_date
2015-11-01 00:00:00pages
3047-58issue
11eissn
0014-4819issn
1432-1106pii
10.1007/s00221-015-4367-9journal_volume
233pub_type
杂志文章abstract::Two rhesus monkeys were trained to make saccadic eye movements from a central fixation point towards a peripheral target. Saccadic reaction times (SRTs) were measured in the gap paradigm (200 ms pause between offset of fixation point and onset of peripheral target). Target position for extensive training (SRTs of 150 ...
journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/BF00230109
更新日期:1990-01-01 00:00:00
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journal_title:Experimental brain research
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journal_title:Experimental brain research
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pub_type: 临床试验,杂志文章,随机对照试验
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pub_type: 杂志文章
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journal_title:Experimental brain research
pub_type: 杂志文章
doi:10.1007/s00221-006-0583-7
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pub_type: 杂志文章
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更新日期:2008-07-01 00:00:00
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更新日期:1989-01-01 00:00:00
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pub_type: 杂志文章
doi:10.1007/s00221-002-1280-9
更新日期:2003-02-01 00:00:00
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pub_type: 杂志文章,评审
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