Iliocostalis Lumborum (Iliocost L)
The M. Iliocostalis Lumborum (Iliocostalis Lumborum) is a muscle of the trunk posterior region. It is responsible for spinal extension and lateral flexion, trunk stabilization. This muscle is one of 26 with official SENIAM-recommended surface EMG electrode placement. This page documents the exact electrode position, anatomical attachments and a standardized test movement based on Hermens et al. (2000).
Spinal extension and lateral flexion, trunk stabilization
2 finger widths lateral to L2, above the iliac crest
Orientation: Parallel to the spine (vertical)
Hermens HJ, Freriks B, Disselhorst-Klug C, Rau G. Development of recommendations for SEMG sensors and sensor placement procedures. J Electromyogr Kinesiol. 2000;10(5):361-74.
Based on SENIAM recommendations (Hermens et al. 2000). Not an official SENIAM product. See all references \u2192
Trunk extension from prone position against resistance
Common use cases for surface EMG measurement of the M. Iliocostalis Lumborum:
2 finger widths lateral to L2, above the iliac crest. Orientation: Parallel to the spine (vertical). Based on the official SENIAM recommendations (Hermens et al. 2000).
Trunk extension from prone position against resistance. This movement is part of the SENIAM protocol for standardized contraction verification.
Yes. The M. Iliocostalis Lumborum is one of 26 muscles for which the SENIAM project has published official surface EMG electrode placement recommendations.
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