Question

which joint movement is required for full abduction of the upper limb?
a.) retraction
b.) depression
c.) superior rotation
d.) inferior rotation

Explanation:

• Retraction: It is the movement of a body part backward, not related to abduction.
• Depression: It is the downward movement of a body part, not related to abduction.
• Superior rotation: During abduction of the upper limb (like lifting the arm out to the side), the scapula (shoulder blade) needs to superiorly rotate. This allows the arm to move freely and achieve full abduction. For example, when you raise your arm, the scapula rotates upward to accommodate the movement.
• Inferior rotation: Opposite of what is needed for abduction.

Answer:

C. Superior rotation