From which fossa does the subscapularis originate?

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Multiple Choice

From which fossa does the subscapularis originate?

Explanation:
Subscapularis originates from the subscapular fossa, the broad concave area on the anterior surface of the scapula. This fossa is specifically the attachment site for this muscle, which then inserts on the lesser tubercle of the humerus to medially rotate the arm. The other options don’t fit because the supraspinous and infraspinous fossae are on the posterior surface and serve other rotator cuff muscles, while the coracoid process is a projection, not a fossa, and is not the origin for subscapularis.

Subscapularis originates from the subscapular fossa, the broad concave area on the anterior surface of the scapula. This fossa is specifically the attachment site for this muscle, which then inserts on the lesser tubercle of the humerus to medially rotate the arm. The other options don’t fit because the supraspinous and infraspinous fossae are on the posterior surface and serve other rotator cuff muscles, while the coracoid process is a projection, not a fossa, and is not the origin for subscapularis.

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