Multivariate analysis of electrical impedance spectra for relaxed and contracted skeletal muscle.
Four-electrode impedance spectra of relaxed and contracted muscle biceps brachii were analyzed in an adult human subject over the frequency range from 300 Hz to 75 kHz. A feasibility of the principal component analysis of bioimpedance measurement for the evaluation of skeletal muscle contractile state was examined. The principal components score plots show a data grouping of the impedance spectra from the two muscle groups. The classification was performed using a soft independent modeling of class analogy (SIMCA) method. The data set comprised 32 samples (16 samples of contracted muscle and 16 samples of relaxed muscle). The leave-one-out test of the classification yields about 80% of correctly classified samples (11 samples for contracted and 15 samples for relaxed muscle).
University of Ljubljana, Faculty of Electrical Engineering, Ljubljana, Slovenia. tomaz.zagar@fe.uni-lj.si
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D000328:Adult; D017097:Electric Impedance; D006801:Humans; D008297:Male; D015999:Multivariate Analysis; D009119:Muscle Contraction / Q000502:physiology*; D009126:Muscle Relaxation / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D025341:Principal Component Analysis; D013057:Spectrum Analysis / Q000379:methods*