Anatomy Exam Muscles of the Rotator Cuff 4

Question 1

In the 'empty can test,' the arm is placed in what position to isolate the supraspinatus?

Accepted Answer

90° abduction with internal rotation, as if emptying a can

Answer

The empty can test positions the arm at 90° abduction with internal rotation (thumb pointing down), isolating supraspinatus tension.

Question 2

Which rotator cuff muscle inserts on the inferior facet of the greater tubercle?

Accepted Answer

Teres minor

Answer

The teres minor inserts onto the inferior facet of the greater tubercle, below the infraspinatus.

Question 3

A 'SITS' mnemonic is used to remember the rotator cuff muscles. What does 'T' represent?

Accepted Answer

Teres minor

Answer

In SITS (Supraspinatus, Infraspinatus, Teres minor, Subscapularis), the 'T' stands for Teres minor.

Question 4

Damage to the suprascapular nerve at the spinoglenoid notch would selectively affect which muscle?

Accepted Answer

Infraspinatus only

Answer

Compression at the spinoglenoid notch affects the suprascapular nerve after it branches to the supraspinatus, so only the infraspinatus is denervated.

Question 5

Which of the following is NOT a function of the rotator cuff as a group?

Accepted Answer

Elevating the clavicle

Answer

The rotator cuff muscles do not act on the clavicle; clavicle elevation is performed by the trapezius and sternocleidomastoid.

Anatomy Exam Practice Test

Anatomy Exam Practice Test

Anatomy Exam Muscles of the Rotator Cuff 4