Electrode Placement for Tilt-Cycle Testing
There are 6 muscles that will be tested. They will be tested on both legs and each of the 6 packs
is designated to two of these muscles, per pack. Pay attention to this when hooking up the
electrodes to the pack, so a template can be brought into the computer system.
Electrode Placement
These electrode placements are based off http://seniam.org/sensor_location.htm, which is the
SENIAM model for placement of electrodes. Each muscle should have two electrodes each when
finished. Each pair of electrodes should be 20mm apart, which is the distance between electrodes
if the edge of one whole electrode stick-on square is right next to the edge of the metal circular
part of the other electrode.
VL (Vastus lateralis):
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Have the subject sitting with their knee in slight flexion and the upper body
slightly bent backward.
Location: Placed at 2/3 on the line from the anterior superior iliac spine to
the lateral side of the patella. Place the electrodes (20mm apart) in
the direction of the muscle fibers (see the direction of the muscle fibers on
the poster of the muscles of the body- about 20 degrees off of this line
angled in towards the knee).
RF (Rectus Femoris):
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Have the subject sitting on a table with the knees in slight flexion and the
upper body slightly bend backward.
Location: Placed 50% on the line from the anterior spina iliaca superior to
the superior part of the patella. Place the electrodes in the direction of this
line.
ST (Semitendinosus):
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Have the subject lying on the belly with the face down and the thigh held
down on the table, in medial rotation, and the leg medially rotated with
respect to the thigh. The knee needs to be flexed to less than 90 degrees.
Location: Placed at 50% on the line between the ischial tuberosity and
the medial epicondyle of the tibia. Place the electrodes in the direction of
this line
BF (Biceps femoris):
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Have the subject lie on their stomach face down and thigh down and have
the knees slightly flexed (less than 90°). Put the thigh in slight lateral
rotation and the leg in slight lateral rotation with respect to the thigh.
Location: Placed at 50% on the line between the ischial tuberosity and
the lateral epicondyle of the tibia. Place the electrodes (20mm apart) in
the direction of this line.
GM (Gastrocnemius medialis):
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Have the subject lay on their stomach with their foot extended and slightly
propped, and have the subject flex their calf.
Location: Placed on the most prominent bulge of the muscle. Place the
electrodes (20mm apart) in the direction of the leg.
TA (Tibialis Anterior)
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Have the subject sit and with their foot in flexion.
Location: The electrodes need to be placed at 1/3 on the line between
the tip of the fibula and the tip of the medial malleolus. Orientated in the
direction of the line between the tip of the fibula and the tip of the medial
malleolus.