Where does the infraspinatus muscle originate?

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Multiple Choice

Where does the infraspinatus muscle originate?

Explanation:
The infraspinatus takes origin from the infraspinous fossa of the scapula, the hollow area on the back of the shoulder blade located just below the spine. This position lets the muscle lie on the posterior surface and move laterally to attach to the humerus, where it helps externally rotate the arm and stabilize the shoulder joint. The supraspinous fossa is where the supraspinatus originates, the subscapular fossa is where the subscapularis originates, and the crest of the spine of the scapula is a ridge used by other muscles such as the posterior deltoid. Therefore, the correct origin is the infraspinous fossa.

The infraspinatus takes origin from the infraspinous fossa of the scapula, the hollow area on the back of the shoulder blade located just below the spine. This position lets the muscle lie on the posterior surface and move laterally to attach to the humerus, where it helps externally rotate the arm and stabilize the shoulder joint. The supraspinous fossa is where the supraspinatus originates, the subscapular fossa is where the subscapularis originates, and the crest of the spine of the scapula is a ridge used by other muscles such as the posterior deltoid. Therefore, the correct origin is the infraspinous fossa.

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