Efficacy and Safety Testing of a New Biologically Based Design Ankle Foot Orthosis in Healthy Volunteer


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The ankle-foot of human body is a multi-joint structure that accommodates complex foot motion. Abnormality to the ankle-foot due to injury or disease can result in abnormal gait motion. In such cases, physiotherapist has to assist hemiplegic patients (ankle dorsiflexor muscles with lack of dorsiflexion assist moment) in rehabilitation therapy by using gait training in parallel bars. Physiotherapist has to support hemiplegic patient to position foot and also supports their stand balance. This prolongs multiple task puts extra burden to physiotherapist which gives side effect such as muscular strain or bone fracture while doing the task. Consequently, the motion of the foot patients did not follow the normal gait pattern. Therefore, there is a need to develop an effective ankle foot orthosis (AFO) to solve the long issue-problem. This research was undertake to embark on the modeling and designing of new ankle foot orthosis (AFO) using active control system which later could be used to help patients with ankle dorsiflexor muscles problem. The work was carried out in four stages involving modeling and simulation of DC motor, algorithm development, design and fabrication of the orthosis and finally, evalaution of the product and its functions. The orthosis was tested on healthy volunteer and the results show that the objective to develop and fabricate a new type of robust ankle foot orthosis which can control movement has been achieved successfully.



Edited by:

Wu Fan






M. N. A. Bin Ab Patar et al., "Efficacy and Safety Testing of a New Biologically Based Design Ankle Foot Orthosis in Healthy Volunteer", Applied Mechanics and Materials, Vols. 110-116, pp. 1953-1957, 2012

Online since:

October 2011




[1] Haim Ring, I. Treger, L. Gruendlinger, J.M. Hausdorff. Neuroprosthesis for Footdrop Compared with an Ankle-Foot Orthosis: Effects on Postural Control during Walking, Journal of Stroke and Cerebrovascular Diseases, Vol. 18, (2009).

DOI: 10.1016/j.jstrokecerebrovasdis.2008.08.006

[2] W.K. Lam, J.C.Y. Leong, Y.H. Li, Y. Hu, W.W. Lu. Biomechanical and electromyographic evaluation of ankle foot orthosis and dynamic ankle foot orthosis in spastic cerebral palsy, Gait & Posture (2005).

DOI: 10.1016/j.gaitpost.2004.09.011

[3] J. Romkes, A.K. Hell, R. Brunner. Changes in muscle activity in children with hemiplegic cerebral palsy while walking with and without ankle–foot orthoses, Gait & Posture 24 (2006).

DOI: 10.1016/j.gaitpost.2005.12.001

[4] C.D.M. Simons, E.H.F. Van Asseldonk, H.V. D Kooji, A.C.H. Buurke, J.H. Buurke. Ankle-foot orthoses in stroke: Effects on functional balance, weight-bearing asymmetry and the contribution of each lower limb to balance control , Clinical Biomechanics 24 (2009).

DOI: 10.1016/j.clinbiomech.2009.07.006

[5] K.E. Gordon, G.S. Sawicki, D.P. Ferris. Mechanical performance of artificial pneumatic muscles to power an ankle–foot orthosis, Journal of Biomechanics 39 (2006).

DOI: 10.1016/j.jbiomech.2005.05.018

[6] D.P. Ferris, K.E. Gordon, G.S. Sawicki, A. Peethambaran. An improved powered ankle–foot orthosis using proportional myoelectric control, Gait & Posture 23 (2006).

DOI: 10.1016/j.gaitpost.2005.05.004

[7] C.A. Crabtree, J.S. Higginson, Modeling neuromuscular effects of ankle foot orthoses (AFOs) in computer simulations of gait, Gait & Posture 29 (2009).

DOI: 10.1016/j.gaitpost.2008.06.004

[8] M.N. Azmi Patar, M.H.M. Ramli, Hafizan Hashim, A.K. Makhtar, Development of An Ankle Foot Orthosis Using Active Control System, International Conference on Advances in Mechanical Engineering (2010).

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