5 Questions
Which muscle assists in stabilizing the head of the humerus within the glenoid cavity?
Subscapularis
Which nerve supplies the supraspinatus muscle?
Suprascapular nerve
From which part of the scapula does the deltoid muscle originate?
Lower lip of the crest of the spine of the scapula
What action does the middle fibers of deltoid muscle perform?
Abducts the arm from 15 to 90 degrees
Which artery is not included in the shoulder region's arterial supply?
Subclavian artery
Study Notes
Muscles of the Shoulder
- The supraspinatus muscle is assisted by the rotator cuff muscles in stabilizing the head of the humerus within the glenoid cavity.
- The supraspinatus muscle is supplied by the suprascapular nerve.
- The deltoid muscle originates from the lateral margin of the acromion process of the scapula.
- The middle fibers of the deltoid muscle perform abduction of the arm.
- The intercostal artery is not included in the shoulder region's arterial supply.
Test your knowledge of the shoulder region anatomy with this quiz. Learn about the muscles, nerves, and arteries in the scapular area and their functions.
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