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Statistical analysis of motor unit firing patterns in a human skeletal muscle.

TitelStatistical analysis of motor unit firing patterns in a human skeletal muscle.
Publication TypeJournal Article
Year of Publication1969
AuthorsClamann, HP
JournalBiophys J
Volume9
Issue10
Pagination1233-51
Date Published1969 Oct
ISSN0006-3495
SchlüsselwörterEMG, Kniearthrose
Abstract

A statistical analysis of the firing pattern of single motor units in the human brachial biceps muscle is presented. Single motor unit spike trains are recorded and analyzed. The statistical treatment of these spike trains is as stochastic point processes, the theory of which is briefly discussed. Evidence is presented that motor unit spike trains may be modelled by a renewal process with an underlying gaussian probability density. Statistical independence of successive interspike intervals is shown using scatter diagrams; the hypothesis of a gaussian distribution is accepted at the 99th percentile confidence limit, chi-square test, in 90% of the units tested. A functional relationship between the mean and standard deviation is shown and discussed; its implications in obtaining sample size are presented in an appendix.The results of higher order analysis in the form of autocorrelograms and grouped interval histograms are presented. Grouped interval histograms are discussed in the context of motor unit data, and used to confirm the hypothesis that a stable probability density function does not represent a good model of the data at this level of analysis.

DOI10.1016/S0006-3495(69)86448-9
Alternate JournalBiophys. J.
PubMed ID5824412
PubMed Central IDPMC1367516
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