Beginner Palmaris Longus Quiz

Q1. In which compartment of the forearm is palmaris longus located?

• Thenar compartment
• Posterior compartment
• Deep posterior compartment
• Anterior compartment

Q2. Palmaris longus belongs to which muscular layer of the anterior forearm?

• Deep posterior layer
• Deep layer
• Intermediate layer
• Superficial layer

Q3. From which bony landmark does palmaris longus originate?

• Olecranon of the ulna
• Radial tuberosity
• Lateral epicondyle of the humerus
• Medial epicondyle of the humerus

Q4. Which nerve supplies palmaris longus?

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

Q5. Where does palmaris longus primarily insert?

• Base of the second metacarpal
• Pisiform only
• Distal phalanx of the thumb
• Flexor retinaculum and palmar aponeurosis

Q6. What is a primary action of palmaris longus?

• Wrist flexion
• Finger abduction
• Elbow extension
• Wrist extension

Q7. Which structure is tensed by contraction of palmaris longus?

• Palmar aponeurosis
• Annular ligament of the radius
• Interosseous membrane
• Extensor expansion

Q8. Which statement about palmaris longus is anatomically characteristic?

• Its absence prevents wrist flexion
• It is found only in the dominant forearm
• It may be congenitally absent
• It is always present bilaterally

Q9. Which description best characterizes the shape of palmaris longus?

• Broad distal muscle belly without a tendon
• Two large heads with no distal tendon
• Short muscle belly with a long distal tendon
• Flat muscle confined entirely to the palm

Q10. Palmaris longus acts primarily across which joint?

• Thumb interphalangeal joint
• Distal interphalangeal joint
• Wrist joint
• Shoulder joint