Abstract
The poor signal-to-noise ratio associated with the acquision of evoked potentials is a well established fact. The problem is compounded if non-invasive techniques, using surface electrodes, are employed. The paper identifies several sources of noise associated with the acquisition of spinal somatosensory evoked potentials using surface electrodes. In addition, the relative contribution of these sources is determined experimentally for six spinal levels ranging from lower lumbar to upper thoracic. These data will prove useful in the design of digital signal processing schemes such as adaptive noise cancellation, where levels of uncorrelated noise severely limit system performance.
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References
Aunon, J. I., McGillem, C. D., andChilders, D. G. (1981): ‘Signal processing in evoked potential research: averaging and modelling’,CRC Crit. Rev. Bioeng., pp. 323–367
Kalkman, C. J. (1992): ‘The role of evoked potentials in neurological monitoring to reduce surgical risk’,Hewlett Packard Advances, pp. 8–9
Lovely, D. F. (1993): ‘Low noise electrode amplifier for use in evoked potential studies’. 19th Canadian Medical & Biological Engineering Conf. Ottawa, Ontario, pp. 236–237
MacEwen, G. D., Bunnell, W. P., andSriram, K. (1975): ‘Acute neurological complications in the treatment of scoliosis: a report of the Scoliosis Research Society’,J. Bone Joint Surg.,57-A, pp. 404–408
MacLennan, A. B., Lovely, D. F., andParker, P. A. (1991): ‘Spinal monitoring utilizing an adaptive matched filter’. 17th Canadian Medical & Biological Engineering Conf. Banff, Alberta, pp. 75–76
Machida, M., Weinstein, S. L., Yamada, T., andKimura, J. (1985): ‘Spinal cord monitoring: electrophysiological measures of sensory and motor function during spinal surgery’,Spine,10, pp. 407–413
Motchenbacher, C. D. andFitchen, F. C. (1973): ‘Low-noise electronic design’ (John Wiley & Sons) ISBN 0-471-61950-7
Nash, C. L. Jr. andBrown, R. H. (1989): ‘Current concepts review spinal cord monitoring’,Bone Joint Surg.,71-A, pp. 627–629
Parker, P. A. andRichard, S. R. (1991): ‘Adaptive noise cancelling filter for myoelectric interference’. 13th Ann. Int. Conf. of IEEE Engineering in Medicine and Biology Society, Orlando, Florida, pp. 843–844
Tam, H. W. andWebster, J. G. (1977): ‘Minimising electrode motion artifact by skin abrasion’,IEEE Trans.,BME-24, pp. 134–139
Widrow, B., Glover, J. R., McCool, J. M., Kaunitz, J., Williams, C. S., Hearn, R. H., Zeidler, J. R., Dong, E., andGoodlin, R. C. (1975): ‘Adaptive noise cancelling: principles and applications’,Proc. IEEE,12, pp. 1692–1716.
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Harrison, S.A.B., Lovely, D.F. Identification of noise sources in surface recording of spinal somatosensory evoked potentials. Med. Biol. Eng. Comput. 33, 299–305 (1995). https://doi.org/10.1007/BF02510503
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DOI: https://doi.org/10.1007/BF02510503