A Review on Designs of Various Ankle Foot Orthosis (AFO) Used to Treat Drop Foot Disease

2020 ◽  
pp. 789-807
Author(s):  
Prashanth R. Kubasad ◽  
Somasekhara Rao Todeti ◽  
Yogeesh D. Kamat
Keyword(s):  
Drop Foot ◽  
Ankle Foot Orthosis ◽  
Foot Disease ◽  
Foot Orthosis

Kinematic and kinetic benefits of implantable peroneal nerve stimulation in people with post-stroke drop foot using an ankle-foot orthosis

2018 ◽  
Vol 36 (4) ◽  
pp. 547-558 ◽  
Author(s):  
Frank Berenpas ◽  
Sven Schiemanck ◽  
Anita Beelen ◽  
Frans Nollet ◽  
Vivian Weerdesteyn ◽  
...  
Keyword(s):  
Nerve Stimulation ◽  
Peroneal Nerve ◽  
Drop Foot ◽  
Ankle Foot Orthosis ◽  
Post Stroke ◽  
Peroneal Nerve Stimulation ◽  
Foot Orthosis

Developing an Active Ankle Foot Orthosis Based on Shape Memory Alloy Actuators

2007 ◽  
Author(s):  
Ehsan Tarkesh ◽  
Mohammad H. Elahinia ◽  
Mohamed Samir Hefzy
Keyword(s):  
Multiple Sclerosis ◽  
Cerebral Palsy ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Muscle Activity ◽  
Heel Strike ◽  
Drop Foot ◽  
Ankle Foot Orthosis ◽  
Foot Orthosis

This paper is on development of an active ankle foot orthosis (AAFO). This device will fill the gap in the existing research aimed at helping patients with drop foot muscle deficiencies as well as rehabilitation activities. Drop foot patients are unable to lift their foot because of reduced or no muscle activity around the ankle. The major causes of drop foot are severing of the nerve, stroke, cerebral palsy and multiple sclerosis. There are two common complications from drop foot. First, the patient cannot control the falling of their foot after heel strike, so that it slaps the ground on every step. The second complication is the inability to clear the toe during swing. This causes the patients to drag their toe on the ground throughout the swing.

scholarly journals An SMA Passive Ankle Foot Orthosis: Design, Modeling, and Experimental Evaluation

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Liberty Deberg ◽  
Masood Taheri Andani ◽  
Milad Hosseinipour ◽  
Mohammad Elahinia
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Motion Analysis ◽  
Experimental Evaluation ◽  
Mechanical Systems ◽  
Drop Foot ◽  
Ankle Foot Orthosis ◽  
New Device ◽  
Superelastic Behavior ◽  
Foot Orthosis

Shape memory alloys (SMAs) provide compact and effective actuation for a variety of mechanical systems. In this work, the distinguished superelastic behavior of these materials is utilized to develop a passive ankle foot orthosis to address the drop foot disability. Design, modeling, and experimental evaluation of an SMA orthosis employed in an ankle foot orthosis (AFO) are presented in this paper. To evaluate the improvements achieved with this new device, a prototype is fabricated and motion analysis is performed on a drop foot patient. Results are presented to demonstrate the performance of the proposed orthosis.

scholarly journals Validation of an helicoidal versus standard ankle-foot orthosis for patients with unilateral drop foot

2018 ◽  
Vol 61 ◽  
pp. e470
Author(s):  
D. Gasq ◽  
B. Acket ◽  
B. Caussé ◽  
N. Cantagrel ◽  
E. Combe ◽  
...  
Keyword(s):  
Drop Foot ◽  
Ankle Foot Orthosis ◽  
Foot Orthosis

Design of a Novel Variable Stiffness Active Ankle Foot Orthosis Using Permanent Magnets for Drop Foot Assistance

2020 ◽  
Author(s):  
Abhinaba Basu ◽  
Sri Sadhan Jujjavarapu ◽  
Ehsan T. Esfahani
Keyword(s):  
Stance Phase ◽  
Gait Cycle ◽  
Permanent Magnets ◽  
Variable Stiffness ◽  
Drop Foot ◽  
Healthy Individuals ◽  
Ankle Foot Orthosis ◽  
Impact Forces ◽  
The Impact ◽  
Foot Orthosis

Abstract In this paper, we present the design of a novel variable stiffness ankle-foot orthosis for correcting the drop-foot condition. The proposed mechanism controls the position of permanent magnets to provide torque and stiffness assistance to the patients suffering from drop foot. A publicly available gait dataset of 20 healthy individuals is used to extract the stiffness and torque requirements of a gait cycle and the information is used to evaluate the foot orthosis. It is shown that the proposed foot orthosis can provide appropriate torque and stiffness assistance to the ankle joint during the swing and the stance phase respectively. Moreover, the spring-like nature of the repelling magnets reduces the impact forces on the patient’s joints.

scholarly journals Development and Preliminary Evaluation of a Lower Body Exosuit to Support Ankle Dorsiflexion

2021 ◽  
Vol 11 (11) ◽  
pp. 5007
Author(s):  
Tim Schubert ◽  
Bettina Wollesen ◽  
Robert Weidner
Keyword(s):  
Statistical Parametric Mapping ◽  
Ankle Dorsiflexion ◽  
Preliminary Evaluation ◽  
Drop Foot ◽  
Ankle Foot Orthosis ◽  
Main Requirement ◽  
Iterative Development ◽  
Significant Difference ◽  
Foot Clearance ◽  
Foot Orthosis

For patients suffering from drop foot due to weakness of ankle dorsiflexion muscles, an ankle foot orthosis provides increased foot clearance during the swing phase of gait, but often restricts other gait functions, such as plantarflexion. Due to steady progress in the development of lighter and smaller actuator technologies, active wearable devices such as exosuits become relevant for rehabilitation, since they can offer an extended functionality including a more comfortable wear than passive plastic orthosis. The aim of the paper is to present a lightweight exosuit supporting dorsiflexion during gait with autonomous recognition of gait phases and conditions. One main requirement during the iterative development of the exosuit is a non-restrictive function, thus no differences between the assisted and non-assisted gait of a healthy subject should occur. We therefore conducted a pilot biomechanics study using statistical parametric mapping to analyze kinematics of the ankle joint and muscle activity of m. tibialis anterior of nine subjects without any gait anomalies walking with and without the exosuit. The results show no significant difference between with and without support. In contrast to passive orthosis, the developed system could be an enhanced solution to assist patients suffering from drop foot, which should be analyzed in the next step for evaluating the development.

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