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 \u2192
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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