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Muscle
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 Click on image for larger view |
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Name
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Erector Spinae
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Subdivision
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Iliocostalis
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Muscle Anatomy
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Origin
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Anterior surface of broad tendon attached to medial
crest of sacrum, spinous processes of lumbar and 11th and 12th thoracic
vertebrae, posterior part of medial lip of iliac crest, supraspinous
ligament and lateral crest of sacrum
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Insertion
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By tendons into inferior border of angles of lower
6 or 7 ribs.
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Function
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Extension, lateral binding (unilateral activity)
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Recommended sensor placement procedure
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Starting posture
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Prone with the lumbar vertebral columns slightly
flexed.
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Electrode size
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Maximum size in the direction of the muscle fibres:
10 mm.
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Electrode distance
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20 mm
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Electrode placement
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- location
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The electrodes need to be placed 1 finger width
medial from the line from the posterior spina iliaca superior to
the lowest point of the lower rib, at the level of L2.
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- orientation
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In the direction of the line between the posterior
spina iliaca superior and lowest point of the lower rib.
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- fixation on the skin
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(Double sided) tape / rings.
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- reference electrode
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On the proc. spin. of C7.
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| Clinical test | Lifting the trunk from a prone position. | |
| Remarks |
The SENIAM guidelines include a separate sensor
placement procedure for the erector spinae longissimus muscle.
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