Pectoralis Major (Sternocostal Head) (Pec Stern L)
The M. Pectoralis Major Pars Sternocostalis (Pectoralis Major (Sternocostal Head)) is a muscle of the shoulder region. It is responsible for adduction, internal rotation at shoulder joint, accessory respiratory muscle (inspiration). 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).
Adduction, internal rotation at shoulder joint, accessory respiratory muscle (inspiration)
4cm medial to anterior axillary fold
Orientation: Horizontal, toward sternum–axillary fold
Król H, Sobota G, Nawrat A. Effect of electrode position on EMG recording in pectoralis major. J Hum Kinet. 2007;17:105-112.
Based on SENIAM recommendations (Hermens et al. 2000). Not an official SENIAM product. See all references →
Adduction of arm against resistance in front of body
This muscle has no SENIAM-standardized electrode position. Placement should be based on anatomical knowledge.
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