What Is the Major Function of the Acromioclavicular Joint

question 25

Multiple Choice

What is the major function of the acromioclavicular joint?

• A)Stabilizes scapula during arm movement to maintain static position of the scapula
• B)Stabilizes scapula on thoracic wall
• C)Rotates scapula during arm movement to keep humeral head and glenoid fossa aligned
• D)Rotates humerus on scapula

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Definitions:

Cervical Plexus

A network of nerves formed by the anterior rami of the first four cervical spinal nerves, which supply motor and sensory innervation to the neck, shoulders, and upper chest.

Phrenic Nerve

The Phrenic Nerve is a nerve that runs from the neck to the diaphragm, playing a crucial role in breathing by controlling the diaphragm's movements.

Brachial Plexus

A network of nerves that originates from the spinal cord in the neck and supplies the arm, forearm, and hand.

Musculocutaneous Nerve

A nerve in the arm that innervates the biceps brachii muscle, playing a key role in bending the elbow and rotating the forearm.