ArticleAnnals of biomedical engineering2013
Transtibial amputee joint motion has increased attractor divergence during walking compared to non-amputee gait.
Article in Annals of biomedical engineering, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- Trial
- Recent applications of chaos theory in medical sciences: progress and challenges.BMC biomedical engineering · 2026Article
- Which factors modulate spontaneous motor tempo? A systematic review of the literature.Frontiers in psychology · 2023Review
- Multi-level modeling with nonlinear movement metrics to classify self-injurious behaviors in autism spectrum disorder.Scientific reports · 2020Article
- ACL injury and reconstruction affect control of ground reaction forces produced during a novel task that simulates cutting movements.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2020Article
- Effects of inclined surfaces on gait variability and stability in unilateral lower limb amputees.Medical & biological engineering & computing · 2019Article
- Selection Procedures for the Largest Lyapunov Exponent in Gait Biomechanics.Annals of biomedical engineering · 2019Article
- A Novel and Safe Approach to Simulate Cutting Movements Using Ground Reaction Forces.Sensors (Basel, Switzerland) · 2018Article
- Article
- The Maximum Lyapunov Exponent During Walking and Running: Reliability Assessment of Different Marker-Sets.Frontiers in physiology · 2018Article
- Altering gait variability with an ankle exoskeleton.PloS one · 2018Article
- Considering passive mechanical properties and patient user motor performance in lower limb prosthesis design optimization to enhance rehabilitation outcomes.Physical therapy reviews : PTR · 2017Article
- Part 2: Adaptation of Gait Kinematics in Unilateral Cerebral Palsy Demonstrates Preserved Independent Neural Control of Each Limb.Frontiers in human neuroscience · 2017Article
- Step activity and stride-to-stride fluctuations are negatively correlated in individuals with transtibial amputation.Clinical biomechanics (Bristol, Avon) · 2015Article
- Dynamic stability of superior vs. inferior body segments in individuals with transtibial amputation walking in destabilizing environments.Journal of biomechanics · 2014Article
- Dynamic stability of individuals with transtibial amputation walking in destabilizing environments.Journal of biomechanics · 2014Article
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Authors and funding
3 authors.
Funding
Abstract
The amputation and subsequent prosthetic rehabilitation of a lower leg affects gait. Dynamical systems theory would predict the use of a prosthetic device should alter the functional attractor dynamics to which the system self-organizes. Therefore, the purpose of this study was to compare the largest Lyapunov exponent (a nonlinear tool for assessing attractor dynamics) for amputee gait compared to healthy non-amputee individuals. Fourteen unilateral, transtibial amputees and fourteen healthy, non-amputee individuals ambulated on a treadmill at preferred, self-selected walking speed. Our results showed that the sound hip (p = 0.013), sound knee (p = 0.05), and prosthetic ankle (p = 0.023) have significantly greater largest Lyapunov exponents than healthy non-amputees. Furthermore, the prosthetic ankle has a significantly greater (p = 0.0.17) largest Lyapunov exponent than the sound leg ankle. These findings indicate attractor states for amputee gait with increased divergence. The increased attractor divergence seems to coincide with decreased ability for motor control between the natural rhythms of the individual and those of the prosthetic device. Future work should consider the impact of different prostheses and rehabilitation on the attractor dynamics.
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