Biomechanics
Biomechanics
Biomechanics
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EMG<br />
Type<br />
Derivation<br />
Pre-<br />
-amplification<br />
Data acquisition and processing EMG Data acquisition and processing<br />
Electrodes<br />
kneel wire surface<br />
mono-polar bipolar multi-polar<br />
passive<br />
active<br />
Based on Soares, R. (2005)<br />
Electrodes anatomical location<br />
Electrodes oriented according the fibers arrangement, with detection surfaces perpendicularly oriented<br />
1st third<br />
Middle<br />
3th third<br />
Signal attenuation away from<br />
the middle point<br />
Middle point of the muscle length<br />
Motor spot<br />
Signal attenuation in the<br />
muscle/ tendon union<br />
0.0000 5.0000 10.000 15.000 20.000 25.000<br />
seconds<br />
Adapted from de Luca (1997)<br />
EMG Data acquisition and processing<br />
<br />
<br />
iEMG (AU)<br />
1<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0<br />
N=40<br />
4 subjects<br />
0 20 40 60 80<br />
Load (% máx.)<br />
EMG<br />
ABS<br />
envelope<br />
RMS<br />
iEMG<br />
Ângulo<br />
iEMG<br />
0.0000 5.0000 10.000 15.000 20.000 25.000<br />
seconds<br />
10.0000<br />
5.00000<br />
0.00000<br />
-5.00000<br />
-10.0000<br />
10.0000<br />
8.00000<br />
6.00000<br />
4.00000<br />
2.00000<br />
0.00000<br />
3.00000<br />
2.00000<br />
1.00000<br />
0.00000<br />
5.00000<br />
4.00000<br />
3.00000<br />
2.00000<br />
1.00000<br />
0.00000<br />
2.50000<br />
2.00000<br />
1.50000<br />
1.00000<br />
0.50000<br />
0.00000<br />
-0.50000<br />
120.000<br />
100.000<br />
80.0000<br />
60.0000<br />
40.0000<br />
20.0000<br />
2.50000<br />
2.00000<br />
1.50000<br />
1.00000<br />
0.50000<br />
0.00000<br />
-0.50000<br />
mV<br />
mV<br />
mV<br />
mV/sqrt(s)<br />
mV.s<br />
graus<br />
mV.s
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