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Stand with your arm adducted at the side of your body, elbow flexed to 90 degrees, and hold a loop of elastic tubing whose other end is anchored in front of you at the same level as your hand. In a sawing motion (back and forth)pull back on the tubing. What is the shoulder joint motion?

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Answer:

Shoulder hyperextension

Explanation:

The movement of the shoulder joint exposed in the question is called Shoulder Hyperextension and is characterized by the posterior movement of the medial epicondyle. The muscles responsible for this movement are the pectoralis major, large dorsal, major round, subscapularis and the anterior deltoid.

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