Determination of sensor location
After the subject has been positioned in the recommended starting
posture, the location of the SEMG sensor can be determined
and marked. 'Sensor location' is defined as the position of
the centre of 2 bipolar electrodes on the muscle. Sensors
should be placed at the location at which a good and stable
SEMG can be obtained. Factors which influence the recording
of a good and stable SEMG are: the presence of motor points
and/or muscle tendons and the presence of other active muscles
near the SEMG sensor (crosstalk).
for determination of sensor location
'Sensor location' is defined as the position of the centre
of 2 bipolar electrodes on the muscle. SENIAM has developed
recommendations for sensor locations on 30 individual muscles.
Within these recommendations the location of the electrodes
is described as a point on a line between 2 anatomical landmarks.
First the position of the anatomical landmarks has to be located
according to the SENIAM recommendations for sensor locations.
Next a line needs to be drawn between the 2 landmarks. The
location for the sensors can be located somewhere on this
line according to the SENIAM recommendations for individual
muscles. These individual recommendations are based on 2 general
-With respect to the longitudinal location of the sensor
on the muscle SENIAM recommends to place the sensor halfway
the (most) distal motor endplate zone and the distal tendon.
-With respect to the transversal location of the sensor on
the muscle SENIAM recommends to place the sensor at the surface
away from the 'edge' with other subdivisions or muscles so
that the geometrical distance of the muscle to these subdivisions
and other muscles is maximised.
The recommendations for sensor locations for individual muscles
are included at another part of this website:
Recommendations for sensor
locations on individual muscles.