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Detection of non-standard EMG profiles in walking
HOF AL; ELZINGA H; GRIMMIUS W
GAIT POSTURE , 2005, vol. 21, n° 2, p. 171-177 Doc n°: 116693 Localisation : Documentation IRR Descripteurs : DF22 - EXPLORATION EXAMENS BILANS - MARCHE, AK2 - EMG The amplitude of an EMG and the temporal pattern can be used when considering if an EMG profile is normal or not. In the method described in this paper a gain factor of the complete EMG profile was determined and then the profile normalised with this gain factor. This normalised individual profile was then compared with a standard profile. Predicted on the basis of walking speed. Deviating profiles were identified when they fell outside the upper and lower 95% limits range for the average profiles of 14 leg muscles. The amount of deviation from the normal profile can be quantified with the normalised mean square difference D-2. Gain factors varied over a factor of 4 within a group of 10 normal subjects. For a normal population D-2 was below 1. Most muscles had consistent profiles but some patterns could be discerned which showed marked variability among muscles and subjects. Langue : ANGLAIS |
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