External Oblique (Obl Ext L)
The M. Obliquus Externus Abdominis (External Oblique) is a muscle of the trunk anterior region. It is responsible for lateral flexion and rotation of the trunk to the opposite side, spinal flexion, compression of the abdominal cavity. This muscle is not covered by the official SENIAM catalogue — placement is based on established clinical literature. This page documents the exact electrode position, anatomical attachments and a standardized test movement based on Hermens et al. (2000).
Lateral flexion and rotation of the trunk to the opposite side, spinal flexion, compression of the abdominal cavity
Below the lowest rib, 45 degrees to the horizontal
Orientation: Parallel to the muscle fibers (oblique, approx. 45 degrees)
Ng JK-F, Kippers V, Richardson CA. Muscle fibre orientation of abdominal muscles and suggested surface EMG electrode positions. Electromyogr Clin Neurophysiol. 1998;38(1):51-58.
Based on SENIAM recommendations (Hermens et al. 2000). Not an official SENIAM product. See all references \u2192
Trunk rotation to the opposite side against resistance
This muscle has no SENIAM-standardized electrode position. Placement should be based on anatomical knowledge.
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