Shoulder and Brachial Plexus – Biomechanics – The Rotator Cuff
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Stability is mostly conferred by robust neuromuscular control of the rotator cuff group of muscles. These arise from the scapula and insert on the tuberosities of the humerus, giving them the mechanical capacity to stabilise the ‘ball in the socket’ against the pull of the powerful muscles that move the arm. Each muscle performs a specific function.
Identify the function of the muscles shown in the image.
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- Internal rotation
- Abduction
- External rotation
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