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Understanding adaptive gait in lower-limb amputees: insights from multivariate analyses
John G Buckley1, Alan R De Asha, Louise Johnson
1Division of Medical Engineering, School of Engineering, Design & Technology, University of Bradford, Richmond Road, Bradford BD7 1DP, UK. j.buckley@bradford.ac.uk
Journal of Neuroengineering and Rehabilitation
|August 21, 2013
Summary
Trans-tibial amputees exhibit distinct obstacle-crossing gait adaptations compared to able-bodied individuals, primarily due to prosthetic limb loading constraints. These differences manifest in reduced foot clearance and altered limb positioning.
Area of Science:
- Biomechanics
- Rehabilitation Engineering
- Human Movement Science
Background:
- Adaptive gait regulation in lower-limb amputees is not fully understood.
- Identifying gait deficits in amputees is crucial for improving mobility.
Purpose of the Study:
- To investigate adaptive gait strategies during obstacle crossing in unilateral trans-tibial amputees versus able-bodied controls.
- To identify distinct gait characteristics and deficits in amputees.
Main Methods:
- Eight unilateral trans-tibial amputees and twelve able-bodied controls performed obstacle crossing trials.
- Spatiotemporal gait variables were measured and analyzed using multivariate statistical techniques.
Main Results:
- Amputees demonstrated reduced approach velocity, foot placement distances, and obstacle foot clearance.
- Lead-limb knee flexion was reduced post-obstacle crossing in amputees.
- Logistic regression identified key distinguishing gait variables between groups.
Conclusions:
- Trans-tibial amputees employ significantly different gait adaptations for obstacle crossing.
- These adaptations are influenced by constraints related to prosthetic limb loading after clearing the obstacle.
- Altered foot placement and reduced knee flexion highlight compensatory strategies in amputees.
