Locomotor stability in able-bodied trunk-flexed gait across uneven ground

Journal article


AminiAghdam, S., Muller, R. and Blickhan, R, (2018). Locomotor stability in able-bodied trunk-flexed gait across uneven ground. Human Movement Science. 62, pp. 176-183.
AuthorsAminiAghdam, S., Muller, R. and Blickhan, R,
Abstract

© 2018 Elsevier B.V. This study aimed to explore the control of dynamic stability of the imposed trunk-flexed gaits across uneven ground. For ten young healthy participants, we compared the anteroposterior margin of stability (MoS) and lower limb joint kinematics at foot-contact during accommodating a consecutive stepdown and step-up (10-cm visible drop) to that of level steps while maintaining four postures: regular erect, ∼30° ∼50° and maximal trunk flexion from the vertical. Two-way repeated measures ANOVAs revealed no significant step × posture interactions for the MoS (p =.187) and for the parameters that contributed to the MoS calculation (p >.05), whereas significant interactions were found for the hip flexion, hip position (relative to the posterior boundary of the base of support) and the knee flexion. The main effect of step (p =.0001), but not posture (p =.061), on the MoS was significant. Post hoc tests, compared with the level step, showed that the decreased magnitude of the MoS during stepping down (p =.011)—mainly due to a further forward displacement of the center of mass position (p =.006)—significantly increased in the immediate following step-up (p =.002) as a consequence of a substantial increase in the base of support (p =.003). In the stepdown versus level step, the hip and knee flexions as well as the hip position did not significantly change in the trunk-flexed gaits (p >.05). In the step-up, the knee flexion increased (except for the gaits with the maximum trunk flexion), whereas other kinematic variables remained unchanged. Quantifying the step-to-step control of dynamic stability in a perturbed walking reflected continuous control adaptations through the interaction between gait and posture. In fact, the able-bodied participants were able to safely control the motion of the body's CoM with the combination of compensatory kinematic adjustments in lower-limb and adaptations in stepping pattern.

Year2018
JournalHuman Movement Science
Journal citation62, pp. 176-183
PublisherElsevier
ISSN1872-7646
Digital Object Identifier (DOI)doi:10.1016/j.humov.2018.10.011
Publication dates
Online29 Oct 2018
Print01 Dec 2018
Publication process dates
Accepted25 Oct 2018
Deposited04 Nov 2019
Accepted author manuscript
License
CC BY-NC-ND 4.0
File Access Level
Open
Permalink -

https://openresearch.lsbu.ac.uk/item/885x2

Accepted author manuscript

  • 0
    total views
  • 0
    total downloads
  • 0
    views this month
  • 0
    downloads this month

Related outputs

Reactive gait and postural adjustments following the first exposures to (un)expected stepdown
AminiAghdam, S., Vielemeyer, J., Abel, R. and Muller, R. (2019). Reactive gait and postural adjustments following the first exposures to (un)expected stepdown. Journal of Biomechanics. 94.
Dynamic postural control during (in)visible curb descent at fast versus comfortable walking velocity
AminiAghdam, S., Griessbach, E., Vielemeyer, J. and Muller, R. (2019). Dynamic postural control during (in)visible curb descent at fast versus comfortable walking velocity. Gait and Posture. 71, pp. 38-43.
The effects of an expected twofold perturbation on able-bodied gait: Trunk flexion and uneven ground surface
AminiAghdam, S. and Blickhan, R. (2018). The effects of an expected twofold perturbation on able-bodied gait: Trunk flexion and uneven ground surface. Gait and Posture. 61 (3), pp. 431-438.
Posture alteration as a measure to accommodate uneven ground in able-bodied gait
AminiAghdam, S., Blickhan, R., Muller, R. and Rode, C. (2017). Posture alteration as a measure to accommodate uneven ground in able-bodied gait. PLoS ONE.
Increasing trunk flexion transforms human leg function into that of birds despite different leg morphology
AminiAghdam, S., Rode, C., Muller, R. and Blickhan, R. (2017). Increasing trunk flexion transforms human leg function into that of birds despite different leg morphology. Journal of Experimental Biology. 220 (3), pp. 478-486.
Effects of altered sagittal trunk orientation on kinetic pattern in able-bodied walking on uneven ground
AminiAghdam, S. and Rode, C. (2017). Effects of altered sagittal trunk orientation on kinetic pattern in able-bodied walking on uneven ground. Biology Open. 6 (7).