Analysis of Sensory Evoked Potentials Using Normalized Cross-Correlation Functions and Polyexponential Regression.

Abstract

Somatosensory evoked potentials (EPs) produced by stimulation of the dorsal columns were recorded from the cervico-medullary junction of adult Rhesus, and were analysed using normalized cross-correlation functions (NCCFs), simple peak-detection, and RMS amplitude measurement. The NCCF 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 NCCF was found to be 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. Polyexponential regression analyses were performed on selected plots and were found to be an effective means of reducing of these data.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1982
Accession Number
ADA121726

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People

  • Michael D. Berger

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DTIC Thesaurus Topics

  • Biomedical Research
  • Biophysics
  • Central Nervous System
  • Computers
  • Cross Correlation
  • Data Analysis
  • Data Mining
  • Data Science
  • Electrophysiological Phenomena
  • Impact Acceleration
  • Information Science
  • Nervous System
  • Regression Analysis
  • Spinal Cord
  • Statistical Algorithms
  • United States
  • Waveforms

Readers

  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Electrical Engineering
  • Regression Analysis.