Dataset Information

Trunk movement compensations and corresponding core muscle demand during step ambulation in people with unilateral transtibial amputation.

ABSTRACT: The objective of this investigation was to identify demands from core muscles that corresponded with trunk movement compensations during bilateral step ambulation in people with unilateral transtibial amputation (TTA). Trunk rotational angular momentum (RAM) was measured using motion capture and bilateral surface EMG was measured from four bilateral core muscles during step ascent and descent tasks in people with TTA and healthy controls. During step ascent, the TTA group generated larger mediolateral (P?=?0.01) and axial (P?=?0.01) trunk RAM toward the leading limb when stepping onto the intact limb than the control group, which corresponded with high demand from the bilateral erector spinae and oblique muscles. During step descent, the TTA group generated larger trunk RAM in the sagittal (P?

SUBMITTER: Gaffney BMM

PROVIDER: S-EPMC5857238 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Trunk movement compensations and corresponding core muscle demand during step ambulation in people with unilateral transtibial amputation.

Gaffney Brecca M M BMM Christiansen Cory L CL Murray Amanda M AM Davidson Bradley S BS

Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology 20180203

The objective of this investigation was to identify demands from core muscles that corresponded with trunk movement compensations during bilateral step ambulation in people with unilateral transtibial amputation (TTA). Trunk rotational angular momentum (RAM) was measured using motion capture and bilateral surface EMG was measured from four bilateral core muscles during step ascent and descent tasks in people with TTA and healthy controls. During step ascent, the TTA group generated larger mediol ...[more]

PMID: 29413449

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Project description:BACKGROUND:Uneven ground is a frequently encountered, yet little-studied challenge for individuals with amputation. The absence of control at the prosthetic ankle to facilitate correction for surface inconsistencies, and diminished sensory input from the extremity, add unpredictability to an already complex control problem, and leave limited means to produce appropriate corrective responses in a timely manner. Whole body angular momentum, L, and its variability across several strides may provide insight into the extent to which an individual can regulate their movement in such a context. The aim of this study was to explore L in individuals with a transtibial amputation, when challenged by an uneven surface. We hypothesized that, similar to previous studies, sagittal plane L would be asymmetrical on uneven terrain, and further, that uneven terrain would evoke a greater variability in L from stride to stride in individuals with amputation in comparison to unimpaired individuals, due to a limited ability to discern and correct for changing contours beneath the prosthetic foot. METHODS:We examined sagittal plane L in ten individuals with a unilateral transtibial amputation and age- and gender- matched control participants walking on flat (FT) and uneven (UT) treadmills. The average range of L in the first 50% of the gait cycle (LR), the average L at foot contact (LC) and their standard deviations (vLR, vLC) were computed over 60 strides on each treadmill. RESULTS:On both surfaces we observed a higher LR on the prosthetic side and a reduced LC on the sound side (p?<?0.001) in the amputee cohort, consistent with previous findings. UT invoked an increase in LC (p?=?0.006), but not LR (p?=?0.491). vLR, and vLC were higher in individuals with amputation (p?<?0.001, p?=?0.002), and increased in both groups on UT (p?<?0.001). CONCLUSIONS:These findings support previous assertions that individuals with amputation regulate L less effectively, and suggest that the deficits of the prosthesis are exacerbated on uneven terrain, potentially to the detriment of balance. Further, the results indicate that a greater demand may be placed on the unaffected side to control movement.

Dataset Information

Trunk movement compensations and corresponding core muscle demand during step ambulation in people with unilateral transtibial amputation.

Publications

Trunk movement compensations and corresponding core muscle demand during step ambulation in people with unilateral transtibial amputation.

Similar Datasets

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