Physics – Data Analysis – Statistics and Probability
Scientific paper
2006-11-13
Zeszyty Naukowe Katedry Mechaniki Stosowanej, vol. 26 (2006) 315-320
Physics
Data Analysis, Statistics and Probability
6 pages, 6 figures, conference "Biomechanics 2006", September 6-8, 2006, Zakopane, Poland
Scientific paper
In order to assess fatigue independent amplitude-frequency correlations in EMG signals we asked nineteen male subjects to perform a series of isometric muscular contractions by extensors of the knee joint. Different amplitudes of the signal were due to randomly varying both the joint moment and the overall amplification factor of the EMG apparatus. Mean and median frequency, RMS and mean absolute value were calculated for every combination of joint moment and amplification at the original sampling rate of 5 kHz and at several simulated lower sampling rates. Negative Spearman and Kendall amplitude-frequency correlation coefficients were found, and they were more pronounced at high sampling rates.
Kebel Alicja
Klajner Piotr
Siemienski Adam
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