객관식
Which of the following muscles is the prime mover for flexion of the arm at the shoulder?
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10. Muscles
Muscle Actions
객관식
Which of the following muscles is NOT part of the rotator cuff?
A
Deltoid
B
Infraspinatus
C
Supraspinatus
D
Teres minor
검증된 단계별 안내1
Step 1: Understand the rotator cuff muscles. The rotator cuff is a group of four muscles that stabilize the shoulder joint. These muscles are Supraspinatus, Infraspinatus, Teres minor, and Subscapularis.
Step 2: Identify each muscle listed in the problem. The options are Deltoid, Infraspinatus, Supraspinatus, and Teres minor.
Step 3: Compare each muscle to the known rotator cuff muscles. Infraspinatus, Supraspinatus, and Teres minor are all part of the rotator cuff group.
Step 4: Recognize that the Deltoid muscle is not part of the rotator cuff. Instead, the Deltoid is a large muscle responsible for lifting the arm and giving the shoulder its rounded contour.
Step 5: Conclude that the muscle NOT part of the rotator cuff from the given options is the Deltoid.
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