Middle Deltoid (Delt Med L)
On the line acromion–lateral epicondyle, at the greatest bulge of the muscle
OrientationAlong the line acromion–hand
Preview — open the 3D viewer to rotate the model and check neighbouring muscles.
View in 3D Viewer
per Criswell 2011, site „Middle Deltoid“, p. 305
The position above follows SENIAM; the crosstalk and artefact notes apply to surface recording of this muscle in general.
Print as a session sheet · A4 with landmarks, signal check and MVC testHermens 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 → · SENIAM reference table · How electrodes are placed (guide) · Glossary
The M. Deltoideus Pars Acromialis (Middle Deltoid) is a muscle of the shoulder region. It is responsible for abduction at shoulder joint (from 15 degrees). 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).
Innervation after Perotto AO, Anatomical Guide for the Electromyographer, 5th ed. 2011 — an anatomical reference, not an electrode placement recommendation.
Raise arm laterally (abduction 90 degrees) against resistance
Abduction works best for the acromial (middle) part; for the clavicular part consider a flexion position, for the spinal part an extension position.
Konrad P. The ABC of EMG. Noraxon; 2005, p. 31. Konrad describes this test at group level; it applies to all muscles of the group. · Why and how to normalise to MVC
The electrode is placed — what next? easyEMG visualises muscle activity in real time, with SENIAM-compliant placement guidance, up to 4 channels at once and biofeedback training right afterwards.
In rehabilitation, the Middle Deltoid is typically recorded to track progress and retrain activation.
On the line acromion–lateral epicondyle, at the greatest bulge of the muscle. Orientation: Along the line acromion–hand. Based on the official SENIAM recommendations (Hermens et al. 2000).
Raise arm laterally (abduction 90 degrees) against resistance. This movement is part of the SENIAM protocol for standardized contraction verification.
Yes. The M. Deltoideus Pars Acromialis is one of 26 muscles for which the SENIAM project has published official surface EMG electrode placement recommendations.
