HEAD NECK
TRIANGLES OF NECK
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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adduction of shoulder
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rotation of shoulder outward
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shoulder abduction
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inward rotation of shoulder
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supinates shoulder
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Detailed explanation-1: -The latissimus dorsi works collaboratively with the teres major and pectoralis major to perform actions of the upper extremity. Together, these muscles will work to adduct, medially rotate, and extend the arm at the glenohumeral joint.
Detailed explanation-2: -The latissimus dorsi, at its anatomic insertion, remains an internal rotator at up to 70° of humeral external rotation. In contrast, the teres minor and all transferred positions of the latissimus dorsi act to rotate the humerus externally, with the moment arm increasing with the degree of humeral external rotation.
Detailed explanation-3: -The infraspinatus is a powerful lateral rotator of the humerus. The tendon of this muscle is sometimes separated from the capsule of the glenohumeral joint by a bursa.
Detailed explanation-4: -Answer and Explanation: The correct answer is d. The latissimus dorsi is responsible for extension, adduction, and medial rotation of the shoulder.