Kinematic patterns of participants with a below-knee prosthesis stepping over obstacles of various heights during locomotion
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Cited by (27)
Sensorimotor function and standing balance in older adults with transtibial limb loss
2023, Clinical BiomechanicsThe effects of laterality on obstacle crossing performance in unilateral trans-tibial amputees
2015, Clinical BiomechanicsCitation Excerpt :Depending on a particular physical therapist's or prosthetist's opinion, leading with either the prosthetic or intact limb can be advocated during amputee rehabilitation, as both approaches can be justified using evidence from published research. For instance, an intact limb lead could be advocated because, when leading with the prosthetic limb, UTAs are unable to increase toe clearance by dorsiflexing the foot during swing (Hill et al., 1997), have knee flexion limited by the posterior edge of the socket (Hill et al., 1997) and are mechanically constrained by the need to minimise residual knee loading during the initial landing period following crossing (Buckley et al., 2013). Conversely, leading with the prosthetic limb may be advocated because the lack of active ‘ankle’ control and power generation at the prosthetic (support) limb (Barnett et al.) means that intact (swing) limb toe clearance is reduced in comparison to that in the able-bodied.
Principles of obstacle avoidance with a transfemoral prosthetic limb
2012, Medical Engineering and PhysicsCitation Excerpt :In addition, the stance limb hip flexion, knee flexion and (on the non-affected side) ankle plantarflexion increase slightly with increased obstacle height, but the stance limb hip elevation does not. Hill et al. [11] concluded that modulations of the stance limb served to position the pelvis further back from the obstacle as the height of the obstacle increased. Transfemoral (TF) amputee subjects make use of adjustment strategies to compensate for the loss of muscles and sensory input in their prosthetic limb during obstacle avoidance, and they learn to cope with bilaterally delayed and decreased obstacle avoidance responses in both limbs [13].
Differences in the coordination of agonist and antagonist muscle groups in below-knee amputee and able-bodied children during dynamic exercise
2008, Journal of Electromyography and KinesiologyCitation Excerpt :From a kinematics point of view, the results showed that joint excursions were similar between AB (CL) and BKA (AL and NAL) children during SIP. This finding revealed the high consistency in behaviour between subject groups, as reported by Hill et al. (1997, 1999) for obstacle avoidance. Thus, the reorganization of coordination observed between AB and BKA children at the level of joint kinetics could be explained by the location of the line of the reaction force vector ahead or behind the different joint centres during stance.
Obstacle crossing in lower limb amputees
2007, Gait and PostureCitation Excerpt :Due to the absence of ankle dorsiflexors and the stiffness of the prosthetic ankle, amputees are not able to shorten the swing limb by ankle dorsal flexion. In TT a decrease in knee flexion and ankle dorsal flexion of the prosthetic limb in swing was shown in obstacle crossing [14]. So far, no studies have been published concerning obstacle crossing in TF.