Middle Trapezius (Trap Trans L)
The M. Trapezius Pars Transversa (Middle Trapezius) is a muscle of the shoulder region. It is responsible for retraction (adduction) of scapula, scapular 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).
Retraction (adduction) of scapula, scapular stabilization
50% between medial scapular border and T3
Orientation: Horizontal, toward spine–scapula line
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
Retract scapulae against resistance (squeeze shoulder blades together)
Common use cases for surface EMG measurement of the M. Trapezius Pars Transversa:
50% between medial scapular border and T3. Orientation: Horizontal, toward spine–scapula line. Based on the official SENIAM recommendations (Hermens et al. 2000).
Retract scapulae against resistance (squeeze shoulder blades together). This movement is part of the SENIAM protocol for standardized contraction verification.
Yes. The M. Trapezius Pars Transversa is one of 26 muscles for which the SENIAM project has published official surface EMG electrode placement recommendations.
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