The Role of Compressive Force in the Movement of the Pectoralis Major

ABSTRACT:

The role of compressive forces are of potential importance in impacting the movement of the pectoralis major. This investigation demonstrates how compressive forces on the pectoralis major can directly influence it’s action when applied to a relaxed pectoral muscle. When the force was applied to the pectoralis major with the ipsilateral arm adducted passively across the chest, which serves to draw insertion and origin closer together, abduction of the arm could be seen when the pectoralis major was contracted. This appears to indicate that, under certain circumstances, the pectoralis major can create both abduction and adduction of the arm. It’s possible that similar principals underly unique phenomena observed in other muscle groups, such as the latissimus dorsi.

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Suggested Citation:

Fry I. The role of compressive force in the movement of pectoralis major. Open Clinical Annals. 2024:1(1):12-13. DOI 10.17605/OSF.IO/G4KVX   https://openannals.wixsite.com/openclinicalannals/the-role-of-compressive-force-in-the-movement-of-the-pectoralis-major