Intermediate Ulna Quiz

Q1. Which muscle inserts primarily onto the ulnar tuberosity and adjacent coronoid process?

• Biceps brachii
• Brachialis
• Brachioradialis
• Triceps brachii

Q2. Which muscle inserts onto the lateral surface of the olecranon and adjacent proximal posterior ulna?

• Biceps brachii
• Supinator
• Anconeus
• Pronator teres

Q3. Which ligament attaches to the margins of the radial notch of the ulna and encircles the radial head?

• Coracoacromial ligament
• Transverse humeral ligament
• Annular ligament
• Radial collateral ligament of the wrist

Q4. Which roughened ridge lies inferior to the radial notch and provides attachment for part of the supinator muscle?

• Styloid process
• Ulnar tuberosity
• Supinator crest
• Interosseous border

Q5. What happens to the olecranon during full extension of the elbow?

• It enters the carpal tunnel
• It enters the radial fossa
• It enters the olecranon fossa of the humerus
• It articulates with the capitulum

Q6. What happens to the coronoid process during elbow flexion?

• It articulates with the radial head
• It enters the olecranon fossa
• It enters the radial groove
• It enters the coronoid fossa of the humerus

Q7. Which portion of the ulna is relatively large proximally and becomes smaller toward the wrist?

• The ulna as a whole narrows from its large proximal end toward its distal end
• The ulna has equal width throughout its entire length
• The ulna expands greatly toward the wrist like the radius
• Only the styloid process narrows toward the elbow

Q8. Which structure separates the distal ulna from direct articulation with the carpal bones?

• Articular disc
• Annular ligament
• Flexor retinaculum
• Interosseous membrane

Q9. During pronation and supination, which statement best describes the relationship between the radius and ulna?

• The two bones remain fused during forearm rotation
• The radius rotates around the relatively stable ulna
• The ulna rotates completely around a fixed radius
• The humerus rotates between the radius and ulna

Q10. Which sequence correctly identifies the major articulations of the ulna from proximal to distal?

• Capitulum and scapula proximally, then scaphoid distally
• Radial styloid proximally, then humeral trochlea distally
• Glenoid cavity proximally, then lunate distally
• Trochlea and radial head proximally, then distal radius distally