scholarly journals A new model of plastic ankle foot orthosis (FAFO (II)) against spastic foot and genu recurvatum

1992 ◽  
Vol 16 (2) ◽  
pp. 104-108 ◽  
Author(s):  
S. Ohsawa ◽  
S. Ikeda ◽  
S. Tanaka ◽  
T. Takahashi ◽  
T. Takeuchi ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Gait Analysis ◽  
Mechanical Stress ◽  
Stance Phase ◽  
Stress Tests ◽  
Ankle Foot Orthosis ◽  
Hamstring Muscles ◽  
Genu Recurvatum ◽  
Foot Orthosis

A plastic ankle foot orthosis (AFO) was developed, referred to as functional ankle foot orthosis Type 2 (FAFO (II)), which can deal with genu recurvatum and the severe spastic foot in walking. Clinical trials were successful or all varus and drop feet, and for most cases of genu recurvatum. Electromyogram studies showed that the FAFO (II) reduced the spasticity of gastrocnemius and hamstring muscles and activated the quadricep muscles. Gait analysis revealed a reduction of the knee angles in the stance phase on the affected side when using the FAFO (II). Mechanical stress tests showed excellent durability of the orthosis and demonstrated its effectiveness for controlling spasticity in comparison with other types of plastic AFOs.

The Use of Orthotics in Foot and Ankle Problems in Cerebral Palsy

Foot & Ankle ◽  
1984 ◽  
Vol 4 (4) ◽  
pp. 195-200 ◽  
Author(s):  
Robert K. Rosenthal
Keyword(s):  
Cerebral Palsy ◽  
Gait Analysis ◽  
Stance Phase ◽  
Specific Problem ◽  
Swing Phase ◽  
Foot Orthoses ◽  
Foot And Ankle ◽  
Ankle Foot Orthosis ◽  
Control Dynamic ◽  
Foot Orthosis

The molded polypropylene orthosis offers many advantages in the treatment of foot and ankle problems in cerebral palsy. Numerous balancing, stance phase, and swing phase difficulties are treated with an ankle-foot orthosis with appropriate molding to correct each specific problem. Various foot orthoses can also be used to control dynamic muscle imbalances. Gait analysis has confirmed the merits of these orthoses.

A wearable gait analysis protocol to support the choice of the appropriate ankle-foot orthosis: A comparative assessment in children with Cerebral Palsy

2019 ◽  
Vol 70 ◽  
pp. 177-185 ◽  
Author(s):  
Bruno Giuseppe Contini ◽  
Elena Bergamini ◽  
Martina Alvini ◽  
Eugenio Di Stanislao ◽  
Giuseppe Di Rosa ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Gait Analysis ◽  
Comparative Assessment ◽  
Ankle Foot Orthosis ◽  
Children With Cerebral Palsy ◽  
Foot Orthosis ◽  
Analysis Protocol

scholarly journals Newly designed computer controlled knee-ankle-foot orthosis (Intelligent Orthosis)

1998 ◽  
Vol 22 (3) ◽  
pp. 230-239 ◽  
Author(s):  
T. Suga ◽  
O. Kameyama ◽  
R. Ogawa ◽  
M. Matsuura ◽  
H. Oka
Keyword(s):  
Lower Limb ◽  
Stance Phase ◽  
Gait Cycle ◽  
Normal Subjects ◽  
Swing Phase ◽  
Ankle Foot Orthosis ◽  
Normal Gait ◽  
Heel Contact ◽  
Computer Controlled ◽  
Foot Orthosis

The authors have developed a knee-ankle-foot orthosis with a joint unit that controls knee movements using a microcomputer (Intelligent Orthosis). The Intelligent Orthosis was applied to normal subjects and patients, and gait analysis was performed. In the gait cycle, the ratio of the stance phase to the swing phase was less in gait with the knee locked using a knee-ankle-foot orthosis than in gait without an orthosis or gait with the knee controlled by a microcomputer. The ratio of the stance phase to the swing phase between controlled gait and normal gait was similar. For normal subjects the activity of the tibialis anterior was markedly increased from the heel-off phase to the swing phase in locked gait. The muscle activities of the lower limb were lower in controlled force in locked gait showed spikes immediately after heel-contact in the vertical at heel-contact in the sagittal to locked gait, gait with the Intelligent Orthosis is smooth and close to normal gait from the viewpoint of biomechanics. Even in patients with muscle weakness of the quadriceps, control of the knee joint using the Intelligent Orthosis resulted in a more smooth gait with low muscle discharge.

scholarly journals Commonly Used Types and Recent Development of Ankle-Foot Orthosis: A Narrative Review

Healthcare ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1046
Author(s):  
Yoo Jin Choo ◽  
Min Cheol Chang
Keyword(s):  
Stance Phase ◽  
Narrative Review ◽  
Foot Drop ◽  
Ankle Foot Orthosis ◽  
Physical Conditions ◽  
Heel Contact ◽  
Foot Problems ◽  
Kenaf Composites ◽  
Foot Orthosis ◽  
Ankle And Foot

(1) Background: ankle-foot orthosis (AFO) is the most commonly prescribed orthosis to patients with foot drop, and ankle and foot problems. In this study, we aimed to review the commonly used types of AFO and introduce the recent development of AFO. (2) Methods: narrative review. (3) Results: AFO prevents the foot from being dragged, provides a clearance between the foot and the ground in the swinging phase of gait, and maintains a stable posture by allowing heel contact with the ground during the stance phase. In clinical practice, the most commonly used AFO include plastic AFO, walking boot, UD-Flex, and carbon fiber AFO. In addition, for compensating the demerits of these conventional AFOs, new types of AFOs, including AF Servo, TurboMed, three-dimensionally printed AFO, and AFO made from kenaf composites, were developed. (4) Conclusions: we think that our review can guide clinicians in selecting and prescribing the appropriate AFO for each patient in accordance with their specific physical conditions.

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.

EFFECT OF AN UNRESTRICTED KNEE-ANKLE-FOOT ORTHOSIS ON THE STANCE PHASE OF GAIT IN HEALTHY PERSONS

Orthopedics ◽  
1990 ◽  
Vol 13 (10) ◽  
pp. 1121-1127
Author(s):  
Kay Cerny ◽  
Jacquelin Perry ◽  
Joan M Walker
Keyword(s):  
Stance Phase ◽  
Ankle Foot Orthosis ◽  
Foot Orthosis ◽  
Healthy Persons
Sign in / Sign up

Export Citation Format

Share Document