Beginner Posterior Compartment of the Arm Quiz

Q1. Which muscle occupies most of the posterior compartment of the arm?

• Coracobrachialis
• Triceps brachii
• Biceps brachii
• Brachialis

Q2. Which nerve supplies the posterior compartment of the arm?

• Musculocutaneous nerve
• Radial nerve
• Median nerve
• Ulnar nerve

Q3. What is the primary action of triceps brachii at the elbow?

• Flexion of the fingers
• Flexion of the forearm
• Extension of the forearm
• Pronation of the forearm

Q4. How many heads does triceps brachii have?

• Three
• Two
• Four
• One

Q5. Which are the three heads of triceps brachii?

• Anterior, posterior, and lateral heads
• Long, short, and medial heads
• Superior, middle, and inferior heads
• Long, lateral, and medial heads

Q6. Where does the triceps brachii tendon insert?

• Medial epicondyle of the humerus
• Coronoid process of the ulna
• Radial tuberosity
• Olecranon of the ulna

Q7. Which small muscle is functionally associated with the posterior compartment near the elbow?

• Palmaris longus
• Anconeus
• Coracobrachialis
• Pronator teres

Q8. Which artery is closely associated with the radial nerve in the posterior compartment of the arm?

• Anterior interosseous artery
• Deep brachial artery
• Ulnar artery
• Radial artery

Q9. Which bone forms the central bony framework of the posterior arm compartment?

• Humerus
• Clavicle
• Ulna
• Radius

Q10. Which movement is most likely to be weakened by dysfunction of the posterior arm compartment?

• Wrist flexion
• Finger flexion
• Thumb opposition
• Elbow extension