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Showing 1 to 20 of 31 for “"Foot orthoses"”.
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The design and control of active ankle-foot orthoses
Ankle foot orthoses (AFOs) can be used to ameliorate the impact of impairments to the lower limb neuromuscular motor system that affect gait. Existing AFO technologies include passive devices with fixed and articulated joints, semi-active devices that modulate damping at the joint and active …
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An investigation into the variable biomechanical responses to antipronation foot orthoses
Antipronation foot orthosis are commonly used by health care professionals to treat a variety of lower limb conditions thought to be caused by excessive foot pronation. However, despite their widespread use, laboratory based research indicates that antipronation foot orthosis cause variable joint …
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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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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 In the last three decades, plastic AFOs have superseded conventional metal AFOs.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 effect of foot orthoses on muscle activity and morphology, foot biomechanics and skin sensitivity
Foot orthoses with a medial wedge or medial arch support are commonly used to treat musculoskeletal pathologies by altering external forces applied to the foot, which could consequently alter internal forces generated by muscles. However, little is known about whether systematic changes in foot …
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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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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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The kinematic effects of three quarter and full length foot orthoses on anterior knee pain sufferers when walking and descending stairs
… the patellofemoral joint is often attributed to foot function. Foot orthoses are commonly prescribed for this condition; however the mechanisms by which they work are poorly understood. Previous studies using single segment foot models have hypothesised that it may be control of the midfoot which …
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The effectiveness of foot orthoses as a treatment for plantar ulceration in leprosy : a study of the efficacy, acceptability, appropriateness and implantation of a podiatric regimen
… and plantar ulceration, were fitted with orthoses and allocated to an experimental group. Thirty-four similar subjects, were not offered orthoses and were allocated to a control group. After 8 months 52% of the ulcers presented by Experimental group and 12% of the ulcers presented by the …
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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
… adopting a wider 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. …
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Rearfoot biomechanics in Achilles tendon function
… treatment options, with a specific focus on rearfoot function and foot orthoses. From this review research questions are defined and experimental studies proposed. Based on the outcomes of the review, the overall aim of this thesis was to identify how (1) rearfoot movement and (2) foot orthoses, …
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Effectiveness of a foot orthosis on muscular activity in functional ankle instability
… instability (FI). It is considered valid that foot orthoses as well as sensorimotor training have a positive effect on ankle muscle activity in healthy individuals and those with lower limb overuse injuries or flat arched feet (reduced reaction time by sensorimotor exercises; increased ankle …
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Investigating the mechanical relationship between the feet and low-back
Introduction: Claims that foot orthoses can resolve low-back pain are common in the marketing of these devices. The claims are based on the notion that wearing the orthoses will limit excess pronation at the subtalar joint thus reducing excessive internal tibial and femoral rotations. Excess leg …
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Kinematics at the ankle joint complex in rheumatoid arthritis
… Previous studies have identified the rearfoot as a common site for inflammatory activity in rheumatoid arthritis resulting in painful and disabling deformity for which there are no proven interventions. A generic electromagnetic tracking system was developed to undertake three-dimensional …
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Design of A Variable-Stiffness Ankle-Foot Orthosis Emulator
Ankle-foot orthoses (AFOs) are passive devices used to improve gait in children with cerebral palsy. They are characterized by a torsional stiffness and ankle neutral angle. For this project, a lightweight ankle exoskeleton was designed to emulate the spring-like behavior of a traditional AFO for a …
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Design and control of an active ankle-foot orthosis
Active ankle-foot orthoses (AAFOs) assist a user unable to dorsiflex the ankle joint. The optimal AAFO is lightweight and aids the user in achieving a nominal gait. This thesis presents the design and control of a novel discrete nonlinear series elastic actuator for AAFOs. The actuator uses …
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Identification, Simulation and Control of an Ankle Foot Orthosis
Drop foot is a neuromuscular condition affecting many patients with abnormality in the walking pattern. The most common treatment to address this condition is ankle foot orthoses. This research presents a study on development of an identified model for a torsional shape memory alloy-based ankle …
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The effect of wedge height on the gait of normal subjects wearing a swift cast
… rehabilitation 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 …
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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 orthoses are commonly prescribed amongst subjects with diplegic cerebral palsy as a conservative orthotic intervention. Multi-articular and bi-articular muscles are more severely involved in subjects with diplegic cerebral palsy. Appropriate clinical assessment including assessment of …
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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
Summary: Studies 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 …
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