What Is Humeroscapular Motion Interface?

Motion between the humerus and scapula commonly is described as glenohumeral

glenohumeral
The glenohumeral joint is a ball and socket joint that includes a complex, dynamic, articulation between the glenoid of the scapula and the proximal humerus. Specifically, it is the head of the humerus that contacts the glenoid cavity (or fossa) of the scapula.
motion. ... This site of nonarticular shoulder motion is defined as the humeroscapular motion interface. Nonarticular humeroscapular motion can be documented and measured using standard magnetic resonance imaging techniques.

What is the Humeroscapular joint?

It involves articulation between the glenoid cavity of the scapula (shoulder blade) and the head of the humerus (upper arm bone). Due to the very loose joint capsule that gives a limited interface of the humerus and scapula, it is the most mobile joint of the human body.

What is obligate translation?

The phenomenon of obligate translation suggests that caution should be exercised in applying large rotational torques to shoulders with tight capsules because of the risk of forcing obligate translation and increasing joint contact pressures.

Elena Rostova

Elena Rostova

Lead Health, Wellness & Medical Journalist

Elena Rostova holds a Master's degree in Public Health Journalism. She covers groundbreaking medical research, holistic wellness trends, mental health awareness, and nutritional science.