Abstract
Somatosensory evoked potentials (e.p.s) produced by stimulation of the dorsal columns were recorded from the cervicol medullary junction of adult rhesus monkeys, and were analysed using normalised cross-correlation functions (n.c.c.f.s.), simple peak detection and r.m.s. amplitude measurement. The n.c.c.f. provided measures of latency shift and waveshape change, while the more traditional peak-detection method provided measures of peak latency and peak amplitude. The results of these procedures were plotted as functions of time relative to a single, brief experimental manipulation (impact acceleration of the whole body). Analysis by means of the n.c.c.f. was found to be a versatile and effective technique the advantages of which include measurement of latency shifts with little contamination by moderate changes in waveshape, quantification of subtle waveshape changes and usefulness under a wide variety of noise conditions
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Berger, M. D. andWeiss, M. S. (1983) Effects of impact acceleration on somatosensory evoked potentials. InImpact injury of the head and spine.Ewing, C. L., Thomas, D. J., Sances, A. Jr. andLarson, S. J. (Eds.), Springfield, Illinois: Thomas 324–378.
Glaser, E. M. andRuchkin, D. S. (1976)Principles of neurobiological signal analysis. Academic Press, New York.
Squires, K. C. andDonchin, E. (1976) Beyond averaging: the use of discriminant functions to recognize event related potentials elicited by single auditory stimuli.Electroenceph. & Clin. Neurophysiol.,41, 449–459.
Squires, K. S., Donchin, E., Herning, H. I. andMcCarthy, G. (1977) On the influence of task relevance and stimulus probability on event-related-potential components.,42, 1–14.
Walsh, P. R., Larson, S. J., Sances, A., Ewing, C. L., Thomas, D. J., Weiss, M. S., Berger, M., Myklebust, J. andCusick, J. F. (1978) Experimental methods for evaluating spinal cord injury during impact acceleration. InElectrotherapeutic sleep and electroanesthesia,V,Wageneder, F. M. andGermann, R. H. (Eds.), Universitat Graz, 435–443.
Weinberg, H. andCooper, R. (1972) The recognition index: a pattern recognition technique for noisy signals.Electroenceph. & Clin. Neurophysiol.,33, 608–613.
Weiss, M. S. andBerger, M. D. (1979) Impact acceleration related changes in brain electrical activity. InModels and analogues for the evaluation of human biodynamic response performance, and protection. Nuilly-Sur-Seine, France: AGARD-CP-253, A20, 1–9.
Weiss, M. S. andBerger, M. D. (1982) Neurophysiological effects of —X inertial impact acceleration. InImpact injury caused by linear acceleration: mechanisms, prevention and cost. Nuilly-Sur-Seine, France: AGARD (in press).
Woody, C. D. (1967) Characterization of an adaptive filter for the analysis of variable latency neuroelectric signals.Med. & Biol. Eng.,5, 539–553.
Author information
Authors and Affiliations
Additional information
Opinions or conclusions contained in this report are those of the author and do not necessarily reflect the views or the endorsement of the Department of the Navy
Reproduction in whole or in part is permitted for any purpose of the United States Government
Rights and permissions
About this article
Cite this article
Berger, M.D. Analysis of sensory evoked potentials using normalised cross-correlation functions. Med. Biol. Eng. Comput. 21, 149–157 (1983). https://doi.org/10.1007/BF02441530
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02441530