In this study, we propose a leg-shaped robot (Leg-Robot) with a magnetorheological fluid clutch (MRFC) to demonstrate virtual haptic of spastic movements of brain-injured patients. The MRFC installed in this system makes it safer than conventional direct-driven robots. At the same time, the MRFC also improves quality of haptic to mimic the human-like reactions. This system is useful to learn diagnosis methods of physical therapy for its trainees. In this article, basic structure and mechanism of the Leg-Robot are explained. Then, control methods and experimental results of three types of spastic movements are described.
Carlson, J.D.2004. ‘‘MR Fluid and Devices in the Real World,’’ In: Proceedings of the Ninth International Conference on Electrorheological Fluids and Magnetorheological Suspensions, Beijing, China, pp. 531-538.
2.
Dimitrijevic, M.R., Nathan, P.W. and Sherwood, A.M.1980. ‘‘Clonus: The Role of Central Mechanisms,’’ Journal of Neurology, Neurosurgery and Psychiatry, 43:321-332.
3.
Dong, S., Lu, K., Sun, J. and Rudolph, K.2005. ‘‘Rehabilitation Device with Variable Resistance and Intelligent Control,’’ Medical Engineering & Physics, 27:249-255.
4.
Elovic, E.P., Simone, L.K. and Zafonte, R.2004. ‘‘Outcome Assessment for Spasticity Management in the Patient with Traumatic Brain Injury: The State of the Art , ’’ Journal of Head Trauma Rehabilitation, 19:155-177.
5.
Geoffrey, W.E.1976. ‘‘Clonus, Beats Provoked by the Application of a Rhythmic Force,’’ Journal of Neurology, Neurosurgery and Psychiatry, 39:266-274.
6.
Harvey, R.L., Roth, E.J. and Yu, D. ( 2007). ‘‘Rehabilitation in Stroke Syndromes,’’ In: Braddom, R.L. (ed.), Physical Medicine & Rehabilitation, 3rd edn, Saunders Elsevier, Philadelphia, pp. 1175-1209.
7.
Hidler, J.M. and Rymer, W.Z.2000. ‘‘Limit Cycle Behaviour in Spasticity: Analysis and Evaluation,’’ IEEE Transaction on Biomedical Engineering, 47:1565-1575.
8.
Hultborn, H., Demton, M.E., Wienecke, J. and Nielsen, J.B.2003. ‘‘Variable Amplification of Synaptic Input to Cat Spinal Motoneurones by Dendritic Persistent Inward Current, ’’ Journal of Physiology, 552:945-952.
9.
Jannel, A.B., Timothy, D.J. and Susan, J.H.2003. ‘‘Clonus after Human Spinal Cord Injury cannot be Attribute Solely to Recurrent Muscle-Tendon Stretch, ’’ Experimental Brain Research, 149:222-236.
10.
Kikuchi, T., Ikeda, K., Kakehashi, T., Otsuki, K. and Furusho, J.2008. ‘‘Development of Compact MRF Clutches for Human-friendly Actuator,’’ In: ROMANCY 17 Robot Design, Dynamics, and Control, Tokyo, Japan, pp. 359-364.
11.
Lehmann, J.F., Price, R., deLateur, B.J., Hinderer, S. and Traynor, C.1989. ‘‘Spasticity: Quantitative Measurements as a Basis for Assessing Effectiveness of Therapeutic Intervention,’’Archives of Physical Medicine and Rehabilitation, 70:6-15.
12.
Lance, J.W.1981. ‘‘Disordered Muscle Tone and Movements,’’Clinical and Experimental Neurology, 18:27-35.
13.
Lee, K.-C., Carson, L., Kinnin, E. and Patterson, V.1989. ‘‘The Ashworth Scale: A Reliable and Reproducible Method of Measuring Spasticity,’’ Neurorehabilitation and Neural Repair, 3:205-209.
14.
Meskers, C.G.M., de Vlugt, E., de Groot, J.H., Wisman, W.H.J., Arendzen, J.H. and van der Helm, F.C.T.2007. ‘‘Determination of Pathological Clonus Characteristics using a Haptic Ankle Manipulator,’’ In: Proceedings of IEEE ICORR 2007, Noordwijk , The Netherlands, pp. 626-630.
15.
Nance, P.W. and Meythaler, J.M. ( 2007). ‘‘Spasticity Management,’’ In: Braddom, R.L. (ed.), Physical Medicine & Rehabilitation, 3rd edn, Saunders Elsevier, Philadelphia, pp. 651-665.
16.
Volker, D. and Thomas, S.2007. ‘‘Spastic Movement Disorder: Impaired Reflex Function and Altered Muscle Mechanics,’’ Lancet Neurology, 6:725-733.
17.
Weinberg, B.A., Nikitchzuk, J.A., Patel S.A., Patritti, B.B.Mavroidis C.A., Bonato, B.2007. ‘‘Design, Control and Human Testing of an Active Knee Rehabilitation Orthotic Device,’’ In: Proceedings of the 2007 IEEE International Conference on Robotics and Automation, Rome, Italy, pp. 4126-4133.
