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Bimodal ankle-foot prosthesis for enhanced standing stability
- Source :
- PLoS ONE, PLoS ONE, Vol 13, Iss 9, p e0204512 (2018)
- Publication Year :
- 2018
-
Abstract
- Previous work suggests that to restore postural stability for individuals with lower-limb amputation, ankle-foot prostheses should be designed with a flat effective rocker shape for standing. However, most commercially available ankle-foot prostheses are designed with a curved effective rocker shape for walking. To address the demands of both standing and walking, we designed a novel bimodal ankle-foot prosthesis that can accommodate both functional modes using a rigid foot plate and an ankle that can lock and unlock. The primary objective of this study was to determine if the bimodal ankle-foot system could improve various aspects of standing balance (static, dynamic, and functional) and mobility in a group of Veterans with lower-limb amputation (n = 18). Standing balance was assessed while subjects completed a series of tests on a NeuroCom Clinical Research System (NeuroCom, a Division of Natus, Clackamas, OR), including a Sensory Organization Test, a Limits of Stability Test, and a modified Motor Control Test. Few statistically significant differences were observed between the locked and unlocked ankle conditions while subjects completed these tests. However, in the absence of visual feedback, the locked bimodal ankle appeared to improve static balance in a group of experienced lower-limb prosthesis users whose PLUS-M mobility rating was higher than approximately 73% of the sample population used to develop the PLUS-M survey. Given the statistically significant increase in mean equilibrium scores between the unlocked and locked conditions (p = 0.004), future testing of this system should focus on new amputees and lower mobility users (e.g., Medicare Functional Classification Level K1 and K2 prosthesis users). Furthermore, commercial implementation of the bimodal ankle-foot system should include a robust control system that can automatically switch between modes based on the user’s activity.
- Subjects :
- Male
030506 rehabilitation
Computer science
Physiology
Vision
medicine.medical_treatment
lcsh:Medicine
Social Sciences
Walking
Prosthesis
Postural control
0302 clinical medicine
Mathematical and Statistical Techniques
Feedback, Sensory
Medicine and Health Sciences
Psychology
lcsh:Science
Postural Balance
Musculoskeletal System
Veterans
Foot (prosody)
Prosthetics
Multidisciplinary
Middle Aged
Biomechanical Phenomena
medicine.anatomical_structure
Patient Satisfaction
Standing Position
Physical Sciences
Legs
Female
Sensory Perception
Anatomy
0305 other medical science
Statistics (Mathematics)
Research Article
Biotechnology
Adult
medicine.medical_specialty
Record locking
Cognitive Neuroscience
Sensation
Artificial Limbs
Prosthesis Design
Research and Analysis Methods
03 medical and health sciences
Motor Reactions
Physical medicine and rehabilitation
Amputees
Ocular System
medicine
Humans
Statistical Methods
Balance (ability)
Aged
Analysis of Variance
Foot
Biological Locomotion
Work (physics)
lcsh:R
Limbs (Anatomy)
Ankles
Motor control
Biology and Life Sciences
Assistive Technologies
Postural Control
Amputation
Cognitive Science
Eyes
lcsh:Q
Medical Devices and Equipment
Ankle
Feet (Anatomy)
Head
030217 neurology & neurosurgery
Mathematics
Neuroscience
Subjects
Details
- ISSN :
- 19326203
- Volume :
- 13
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- PloS one
- Accession number :
- edsair.doi.dedup.....b9a3215983e7756b73ff5f2bf22149f2