Abstract Prosthetic feet are designed to store energy during early stance and then release a portion of that late stance. The usefulness providing more return depends on whether or not transfers up the lower limb aid in whole body propulsion. This research examined how increasing prosthetic foot affected walking mechanics across various slopes. Five people with uni-lateral transtibial amputation walked an instrumented treadmill at 1.1 m/s for three conditions (level ground, +7.5°, −7.5°)...

Cyclists with unilateral transtibial amputation (CTA) provide a unique model to study integration of the neuromuscular and bicycle systems while having option modify this via properties prosthesis. This included eight CTA nine intact cyclists. The cyclists pedaled on stationary instrumented force pedals. group stiff or flexible prosthetic foot during simulated time trial low difficulty condition. During condition, pedaling resulted in work asymmetries 11.4% 30.5%, displayed 11.1% 21.7%, 4.3%...

People with amputations may find cycling advantageous for exercise, transportation and rehabilitation. The reciprocal nature of stationary also makes it a viable model research in motor control because the body is supported by saddle allowing researcher to focus on cyclic movement legs without confounding variable balance. purpose this article provide an overview task intact cyclists relate information understanding challenges faced transtibial (CTA). Ongoing into biomechanics CTAs will be...

Limb movement between the residuum and socket continues to be an underlying factor in limb health, prosthetic comfort, gait performance yet techniques measure this have been underdeveloped.Develop a method motion residual transtibial socket.Single subject, repeated measures with mathematical modeling.The of participant amputation was recorded using capture system marker set that included arrays on anterior distal tibia lateral epicondyle femur. The proximal or translation, posterior angular...

Extremity injuries occur frequently during warfare. While traditionally treated in definitive clinics, the future battlefield is projected to be different a variety of ways, and there will likely shift towards prolonged field care (PFC) for treating extremity traumas. PFC defined as medical that applied beyond "doctrinal planning time-lines" by tactical practitioner order decrease patient mortality morbidity. At present, an urgent need develop biologically focused technologies setting....

People with amputation move asymmetrically regard to kinematics (joint angles) and kinetics forces moments). Clinicians have traditionally sought minimize kinematic asymmetries, assuming kinetic asymmetries would also be minimized. A cycling model evaluated locomotor asymmetries. Eight individuals unilateral transtibial pedaled 172 mm-length crank arms on both sides (control condition) the arm length shortened 162 mm amputated side (CRANK condition). Pedaling limb were recorded. Joint...

In persons with limb loss, prosthetic devices cause skin breakdown, largely because residual (nonvolar) is not intended to bear weight such as palmoplantar (volar) skin. Before evaluation of treatment efficacy improve resiliency, efforts are needed establish normative data and assess outcome metric reliability. The purpose this study was use optical coherence tomography (i) characterize volar nonvolar epidermal thickness (ii) examine the reliability tomography. Four orientations images were...

The individual pursuit is a 4-km cycling time trial performed on velodrome. Parathletes with transtibial amputation (TTA) have lost physiological systems, but this may be offset by the reduced aerodynamic drag of prosthesis. This research was to understand effect unilateral TTA Olympic performance. A forward-integration model performance explored interplay between power loss and gains in parathletes TTA. calibrated 4:10.5 (baseline), then adjusted account for Conditions simulated were based...

Few published reports exist regarding the control of human/prosthesis interface in persons with unilateral transtibial amputation.To investigate strategies employed by prosthetic users controlling to highlight challenges associated either amputation or design prosthesis.Randomized controlled trial.Cycling was used as locomotor task allow for better mechanics compared walking. A group nine cyclists intact limbs were eight (CTA) during a simulated cycling time trial. The CTA pedaled stiff and...

In Brief The purpose of this research was 1) to develop a system measure pistoning in sagittal plane (2D), 2) test during dynamic task (cycling), and 3) determine the effect prosthetic suspension. limb/socket motion measurement device consisted an aluminum frame attached socket. Two linear potentiometers were aligned with longitudinal orthogonal axes prosthesis. subject wore small metal bracket adhered skin over distal tibia that protruded through slit cut into liner. opposite ends connected...

This research tested a reproducible uneven walkway designed to destabilize human gait. Ten participants walked 30 times over even and (7.3 × .08 m, sequentially-placed wooden blocks in rotating pattern, 1-cm thick rubber mat) walkways. A full-body marker set 8-camera motion capture system recorded limb kinematics. MatLab 2013b was used calculate measures of gait stability: angular momentum, margin stability, step width variability, CoM height, toe clearance, lateral arm swing. The minimum...

Activation patterns in one- and two- joint muscles generally reflect their biomechanical role movement control. Lower limb loss will affect the played by individual The gastrocnemius (GAS) muscle is altered following transtibial amputation, relegated to a one-joint knee flexor. Little known if activation of this adapts its new selected tasks. PURPOSE: To examine cyclists with without uni-lateral amputation. METHODS: Three intact (IC) six amputee (AC) were studied. subjects cycled (200 watts...

ABSTRACT Introduction Powered orthoses have the potential to benefit pathologic or geriatric populations by increasing quality of their mobility, reducing metabolic cost, and helping restore functional status. However, user interface design powered is rarely considered, may limit clinical impact. The aim this study was evaluate a novel for hip orthosis. We hypothesized that our would reduce costs, skin irritation, increase comfort, pain during ambulation when compared with an off-the-shelf...

Abstract The treatment and evacuation of people with lower limb fractures in austere environments presents unique challenges that assistive exoskeletal devices could address. In these dangerous situations, independent mobility for the injured can preserve their vital capabilities so they safely evacuate minimize need additional personnel to help. This expert view article discusses how different exoskeleton archetypes provide while satisfying requisite needs portability, maintainability,...

Selection of a foot is an important aspect prosthetic prescription and vital to maximizing mobility functional goals after lower limb amputation. Development standardized approach soliciting user experiential preferences needed improve evaluation comparison feet.

ABSTRACT Background Mass media, such as movies, may be a factor in how society views people with limb loss. If the portrayal is inaccurate or negative, then this could create additional challenges for loss to cope their amputation and reintegrate society. The purpose of study was define characters movies. hypothesis that positive amputation, defined heroism realistic prostheses, would increase over time. Methods Quantitative content analysis performed systematically objectively analyze...

Bone stress injuries are prevalent among athletes and military recruits can significantly compromise training schedules. The development of an ankle–foot orthosis to reduce tibial load enable a faster return activity will require new device testing methodologies capable capturing the contribution muscular force on strain. Thus, actuated robotic surrogate leg was developed explore how strain changes with different conditions. purpose this work assess reliability, scalability, behavior...

ABSTRACT Introduction In prolonged care scenarios, where medical evacuations are significantly delayed, the treatment and transport of casualties with extremity musculoskeletal injuries will drain combat units’ human resources. Developing enhanced splinting techniques to restore casualty mobility function can alleviate this drain. To guide development, a panel tactical wilderness medicine experts was assembled determine which had greatest impact on unit capabilities, materials available for...

Abstract This investigation seeks to understand how the interfaces between fracture orthoses and body affect relative motion user device. Excessive can inadvertantly load prevent healing. Identifying that minimize will inform designs of future orthoses. Three types were tested: a thigh corset, sling loaded ischium, patellar tendon. Eighteen able-bodied participants fitted with an adjustable Interface Testing System (ITS) redirected loads away from foot lower leg more proximal parts using...