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Showing 1 to 20 of 31 for “"AFO"”.
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Force-controllable ankle foot orthosis (AFO) to assist drop foot gait
… assistive device is the Ankle Foot Orthosis (AFO), which though offering some biomechanical benefits, is nonadaptive and fails to eliminate significant gait complications. An Active Ankle Foot Orthosis (AAFO) is presented where the impedance of the orthotic joint is modulated throughout the …
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The direct effects of variations in AFO stiffness on the kinematics and kinetics of gait
… orthoses, and in particular ankle-foot orthoses (AFOs), are externally applied devices designed to maintain the foot in a desirable position with respect to the shank. Currently, the prescription and design of orthoses is still based on the expertise of orthotists instead of based on evidence from …
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Effects of two different types of ankle foot orthoses on gait outcomes in patients with subacute stroke
Ankle Foot Orthosis (AFO) is a commonly prescribed device to improve foot drop and gait in patients with stroke. The purpose of this study was to identify whether patients in the subacute stage of stroke, with foot drop, would have better gait outcomes when using a double adjustable AFO (DA AFO), …
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Individual plantar flexor compensation during walking with a unilateral passive dynamic ankle-foot orthosis : a simulation study
Ankle foot orthoses (AFOs) are designed to improve walking ability in persons with a variety of musculoskeletal and neuromuscular disorders. Passive dynamic AFOs (PD-AFOs) are a special class of orthoses that function like a torsional spring, which store elastic energy in early stance and release …
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Adaptive gait strategies of healthy individuals walking with a novel bi-linear stiffness ankle-foot orthosis
… stability about the ankle joint. Passive-dynamic AFOs (PD-AFOs) are broadly designed with a foot plate, a cuff that wraps around the shank, and a strut connecting the foot plate and cuff. A PD-AFO’s strut is the primary contributor to its stiffness properties, which can be customized and tuned to …
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Understanding the effects of wearing a quantitatively prescribed passive-dynamic ankle-foot orthosis on the mechanical cost-of-transport and gait velocity in individuals post-stroke
… passive-dynamic ankle-foot orthoses (PD-AFOs) to aid in the control of shank forward rotation during mid-to- terminal stance due to plantar flexor weakness. PD-AFO bending stiffness is a key orthotic characteristic that can assist the plantar flexor muscles by providing the resistance …
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Investigation of bench methods for determining stiffness of solid ankle-foot orthoses
The applications of ankle-foot orthoses (AFOs) are nowadays the most common treatment for the compensation of neuromuscular disorders usually caused by stroke and spinal cord or peripheral nerve injuries. The biomechanical functions of plastic AFOs are determined by their thickness, the material …
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Measuring the functional and clinical effectiveness of a passive dynamic ankle foot orthosis when used to rehabilitate complex limb salvage post lower limb blast trauma
… suggest passive dynamic ankle foot orthoses (PD AFO) are effective at improving gait and patient reported outcomes measures (PROM) in personnel who have undergone limb salvage due to blast trauma. Studies using PD AFOs have included able bodied and personnel with variable clinical presentations. …
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Study of mechanical characteristics of ankle-foot orthoses using finite element analysis method
Ankle-foot orthoses (AFOs) are external devices applied to the lower leg segment in patients with ankle joint impairment due to neuromusculoskeletal disorders resulting in abnormal gait. In the last three decades, plastic AFOs have superseded conventional metal AFOs. Prescriptions of AFOs by …
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The Application of Series Elastic Actuators in the Hydraulic Ankle-Foot Orthosis
… fits into this trend is the Ankle-Foot Orthosis (AFO), which is a device that restrains or strengthens the movement of an ankle to assist the user during gait. A powered AFO uses an actuator and power supply to add positive power to the ankle but becomes heavier as the power output increases. To …
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Network-Based Naval Ship Distributed System Design using Architecture Flow Optimization
… framework and Architecture Flow Optimization (AFO) to naval ship Concept & Requirements Exploration (C&RE). It describes refinements to both C&RE and AFO, and naval surface combatant concept design case studies. The architectural framework decomposes naval ship distributed systems into the …
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Architecture Flow Optimization - Refinement and Application for Naval Ship Concept Design
… refinement of an Architecture Flow Optimization (AFO) tool for naval surface ship design, specifically focusing on the development of new network and matrix-based methods for AFO formulation and their application in Concept Development. The AFO tool analyzes and optimizes the flow of energy …
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Network-Based Naval Ship Distributed System Design and Mission Effectiveness using Dynamic Architecture Flow Optimization
… framework, Architecture Flow Optimization (AFO), and Dynamic Architecture Flow Optimization (DAFO) to naval ship Concept and Requirements Exploration (CandRE). The architectural framework decomposes naval ship distributed systems into physical, logical, and operational architectures …
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Development and Application of Dynamic Architecture Flow Optimization to Assess the Impact of Energy Storage on Naval Ship Mission Effectiveness, System Vulnerability and Recoverability
… framework, Architecture Flow Optimization (AFO), Dynamic Architecture Flow Optimization (DAFO), and Energy Storage System (ESS) model in naval ship Concept and Requirements Exploration (CandRE). The particular objective of this dissertation is to determine and assess Energy Storage System …
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The effect of wedge height on the gait of normal subjects wearing a swift cast
… goals for stroke patients. Ankle foot orthoses (AFOs) are regularly prescribed to help achieve this goal for stroke patients who have suffered from strokes or other neurological disorders with lower limb disabilities. When customising AFOs evidence suggests that tuning the orthosis to optimise …
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Modeling of Distributed Naval Ship Systems using Architecture Flow Optimization
… using an Architecture Flow Optimization (AFO). This thesis presents a unique method and tool to optimize naval ship system logical and physical architecture considering necessary operational conditions and possible damage scenarios. The particular and unique contributions of this thesis …
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The effect of ankle-foot orthosis on gait and the procedures used to assess bi-articular muscle length and spasticity in subjects with diplegic cerebral palsy
… ankle-foot orthosis footwear combination (AFO-FC) prescription and any required adjunct therapy.The overarching aim of this thesis was to investigate the effect of optimisation of the temporal midstance shank kinematics with the use of an AFO- FC on several variables including shank …
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Sensory re-weighting for balance control and the effects of ankle foot orthoses and stance width: A comparison of people with diabetic peripheral neuropathy and healthy participants
… stance width and wearing Ankle Foot Orthoses (AFOs) may also affect sensory input as well as altering the mechanics of the ankle and hip joints. The impact of distal sensory loss on the sensory control of balance in people with DPN compared to the healthy population is unknown. Moreover, it is …
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The use of Tone Relieving Ankle-Foot Orthoses in the management of children with cerebral palsy
Tone Relieving Ankle Foot Orthoses (TRAFOs) have been used in the management ofneurophysically impaired patients for some years within the United States and during thelast few years they have been introduced in the UK. The main difference between aTRAFO and a standard polypropylene ankle foot …
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Design of actuation system and minimization of sensor configuration for gait event detection for Gen 3.0 Portable Powered Ankle-Foot Orthosis (PPAFO)
Powered ankle-foot orthoses (AFOs), which are capable of providing assistive torque at the ankle joint, have significant potential as both assistance and rehabilitation devices. Technology advancements have led to great progression in the development of powered AFOs. Our group had developed the …
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