Naslov
Quadriceps muscle features assessment during fatigued cyclic dynamic contractions

Autori
Cifrek, Mario ; Bego, Uroš ; Tonković, Stanko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the European Medical & Biological Engineering Conference EMBEC '99 / Rehak, Peter ; Hutten, Helmut - Beč : Peter Peregrinus Ltd., 1999, 324-325

Skup
EMBEC '99 - European Medical and Biological Engineering Conference

Mjesto i datum
Beč, Austrija, 04.11.1999. - 07.11.1999

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
muscle fatigue; dynamic contractions; surface EMG; time-frequency analysis

Sažetak
Surface myoelectric signal analysis was carried out in order to determine particular quadriceps muscles features. Measurements are performed during fatigued exercise on leg-extension training device. Using spectrogram analysis, a time course of median frequency (MF) was computed. As a fatigue index, slope of regression line fitting maximum values of MF during each contraction in a least-square sense was used. MF at the beginning of exercise were calculated from regression line. Muscle with higher conduction velocity (rectus femoris) exhibited greater initial value as well as a greater reduction of MF over the course of the exercise. Higher differ-ences in initial values of MF between rectus femoris and both vasti muscles for males in comparison with females are shown.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA