Abstract
Functional neuromuscular stimulation (FNS) has been used in open-loop upper-extremity neuroprostheses to provide grasp and release for quadriplegic individuals. A principal issue in implementation of the open-loop neuroprosthesis is the synthesis of the grasp stimulus map, which is the relationship between the input control signal and the output stimulus applied to each electrode. The goal of this project was to developed a method of stimulus map synthesis which compensates for the influence of the electrode-position-dependent recruitment properties on the grasp output, and which can be performed using automated procedures. A method called the external moment grasp synthesis procedure (GSP) has been developed which meets these criteria. The GSP uses an external moment of model of the hand which describes the interaction between the active moments produced by electrical stimulation, the passive joint moments and the total joint moment and angle. The GSP was used to develop the stimulus map for three paralysed subjects, and in all cases the GSP-generated grasp patterns had lower errors than grasp patterns developed using the previously implemented rule-based method of stimulus map synthesis. The GSP was successfully implemented by computer and was able to compensate for the effects of the electrode recruitment properties on the grasp pinch force.
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Akazawa, K., Makikawa, M., Kawamura, J. andAoki, H. (1989) Functional neuromuscular stimulation system using an implantable hydroxyapatite connector and a microprocessor-based portable stimulator.IEEE Trans.,BME-36, 746–752.
Buckett, J. R., Peckham, P. H., Thrope, G. B., Braswell, S. D. andKeith, M. W. (1988) A flexible, portable system for neuromuscular stimulation in the paralyzed upper extremity. ——Ibid.,BME-35, 897–904.
Crago, P. E., Peckham, P. H. andThrope, G. B. (1980) Modulation of muscle force by recruitment during intramuscular stimulation. ——Ibid.,BME-27, 679–684.
Forsythe, G. E., Malcolm, M. A. andMoler, C. B. (1977)Computer methods for mathematical computations. Prentice-Hall Inc., Englewood Cliffs, New Jersey.
Gorman, P. H. andPeckham, P. H. (1991) Upper extremity functional neuromuscular stimulation.J Neuro. Rehabil.,5, 3–11.
Guyton, A. C. (1981)Textbook of medical physiology, 6th edn. W. B. Saunders Co., Philadelphia.
Handa, Y. andHoshimiya, N. (1987) Functional electrical stimulation for the control of the upper extremities.Med. Prog. through Technol.,12, 51–63.
Handa, Y., Ohkubo, K. andHoshimiya, N. (1989) A portable multi-channel FES system for restoration of motor function of the paralyzed extremities.Automedica,11, 221–231.
Hoshimiya, N. andHanda, Y. (1989) A master-slave type multichannel functional electrical stimulation system for the control of the paralyzed upper extremities. ——Ibid.,11, 209–220.
Hoshimiya, N., Naito, A., Yajima, M. andHanda, Y. (1989) A multichannel FES system for the restoration of motor functions in high spinal cord injury patients: a respiration-controlled system for multijoint upper extremity.IEEE Trans.,BME-36, 754–760.
Ignagni, A. R. (1989) Usage monitoring in an upper extremity neuroprosthetic stimulation system. MS Thesis Case Western Reserve University.
Johnson, M. W., Buckett, J. R. andPeckham, P. H. (1988) A miniature Hall-effect joystick transducer: the next generation. Proc. ICAART, Montreal, 25–30 June 1988, Association for the Advancement of Rehabilitation Technology, 426–427.
Johnson, M. W. andPeckham, P. H. (1990) Evaluation of shoulder movement as a command control source.IEEE Trans.,BME-37, 876–885.
Kailath, T. (1977)Linear systems. Prentice-Hall, Inc., Englewood Cliffs, New Jersey.
Keith, M. W., Peckham, P. H., Thrope, G. B., Stroh, K. C., Smith, B., Buckett, J. R., Kilgore, K. L. andJatich, J. W. (1989) Implantable functional neuromuscular stimulation in the tetraplegic hand.J. Hand Surg.,14A, 524–530.
Kilgore, K. L., Peckham, P. H., Thrope, G. B., Keith, M. W. andStone, K. A. (1989) Synthesis of hand movement using functional neuromuscular stimulation.IEEE Trans.,BME-36, 761–770.
Kilgore, K. L., Peckham, P. H., Keith, M. W. andThrope, G. B. (1990) Electrode characterization for functional application to upper extremity FNS. ——Ibid.,BME-37, 12–21.
Kilgore, K. L. andPeckham, P. H. (1993) Grasp synthesis for upper-extremity FNS. Part 2 Evaluation of the influence of electrode recruitment properties.Med. & Biol. Eng. & Comput.,31, (6), 615–622.
Nathan, R. H. (1984) The development of a computerized upper limb electrical stimulation system.Orthopedics,7, 1170–1180.
Nathan, R. H. andOhry, A. (1990) Upper-limb functions regained in quadriplegia: a hybrid computerized neuromuscular stimulation system.Arch. Phys. Med. Rehabil.,71, 415–421.
Peckham, P. H., Marsolais, E. B. andMortimer, J. T. (1980a) Restoration of key grip and release in the C6 tetraplegic patient through functional electrical stimulation.J. Hand Surg.,5, 462–469.
Peckham, P. H., Mortimer, J. T. andMarsolais, E. B. (1980b) Controlled prehension and release in the C5 quadriplegic elicted by functional electrical stimulation of the paralyzed forearm musculature.Ann. Biomed. Eng.,8, 369–388.
Peckham, P. H., Poon, C. W., Ko, W. H., Marsolais, E. B. Rosen, J. J. (1981) Multichannel implantable stimulator for control of paralyzed muscles.IEEE Trans. BME-28, 530–536.
Peckham, P. H., Thrope, G. B., Buckett, J. R., Freehafer, A. A. andKeith, M. W. (1983) Coordianted two mode grasp in the quadriplegic initiated by functional neuromuscular stimulation. InIFAC control aspects of prosthetics and orthotics.Campbell, R. M. (Ed.), Pergamon Press, Oxford, 29–32.
Peckham, P. H., Keith, M. W. andFreehafer, A. A. (1988) Restoration of functional control by electrical stimulation in the upper extremity of the quadriplegic patient.J. Bone & Joint Surg.,70A, 144–148.
Petrofsky, J. S., Phillips, C. A. andStafford, D. E. (1984) Closed loop control for restoration of movement in paralyzed muscle.Orthopaedics,7, 1289–1302.
Stein, R. B. (1980)Nerve and muscle. Plenum Press, New York.
Wijman, C. A., Stroh, K. C., van Doren, C. L., Thrope, G. B., Peckham, P. H. andKeith, M. W. (1990) Functional evaluation of quadriplegic patients using a hand neuroprosthesis.Arch. Phys. Med. Rehabil.,71, 1053–1057.
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Kilgore, K.L., Peckham, P.H. Grasp synthesis for upper-extremity FNS. Med. Biol. Eng. Comput. 31, 607–614 (1993). https://doi.org/10.1007/BF02441809
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DOI: https://doi.org/10.1007/BF02441809