Posterior Deltoid (Delt Post R)
The M. Deltoideus Pars Spinalis (Posterior Deltoid) is a muscle of the shoulder region. It is responsible for retroversion (extension), external rotation and horizontal abduction at shoulder joint. 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).
Retroversion (extension), external rotation and horizontal abduction at shoulder joint
2 finger widths behind the acromial angle
Orientation: Toward acromion–little finger
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
Move arm backward (extension) against resistance
Common use cases for surface EMG measurement of the M. Deltoideus Pars Spinalis:
2 finger widths behind the acromial angle. Orientation: Toward acromion–little finger. Based on the official SENIAM recommendations (Hermens et al. 2000).
Move arm backward (extension) against resistance. This movement is part of the SENIAM protocol for standardized contraction verification.
Yes. The M. Deltoideus Pars Spinalis is one of 26 muscles for which the SENIAM project has published official surface EMG electrode placement recommendations.
Interactive SENIAM electrode placement — free, instant access, no sign-up required.
Open 3D Viewer →Electrode placement guides, EMG tips and updates — free via email.
Professional EMG biofeedback software for PicoBlue sensors. Real-time visualization, 5 training modes, PDF reports.