Radius and Ulna Quiz
Questions: 16 · 10 minutes
1. In the standard anatomical position, which statement correctly describes the radius and ulna?
The radius is lateral, and the ulna is medial.
The radius is medial, and the ulna is lateral.
The radius is anterior, and the ulna is posterior.
The radius is proximal, and the ulna is distal.
2. During elbow flexion, which ulnar process enters a corresponding fossa on the anterior humerus?
Olecranon
Coronoid process
Radial notch
Ulnar styloid process
3. Which landmark receives the insertion of the triceps brachii tendon?
Radial head
Ulnar styloid process
Olecranon
Coronoid process
4. The radial notch of the ulna articulates with which structure?
Trochlea of the humerus
Head of the ulna
Articular circumference of the radial head
Scaphoid
5. Which proximal radial structure articulates with the capitulum of the humerus?
Head of the radius
Neck of the radius
Radial tuberosity
Ulnar notch
6. A tendon uses the dorsal tubercle of the distal radius as a pulley. Which tendon is it?
Extensor pollicis longus
Extensor carpi ulnaris
Flexor pollicis longus
Brachioradialis
7. The tendon of the biceps brachii inserts on which bony landmark?
Olecranon
Coronoid process
Radial tuberosity
Dorsal tubercle of the radius
8. Which part of the ulna articulates with the trochlea of the humerus?
Radial notch
Trochlear notch
Ulnar head
Styloid process
9. Which two surfaces meet at the distal radioulnar joint?
Radial head and trochlear notch
Radial tuberosity and coronoid process
Radial styloid and ulnar styloid
Ulnar notch of the radius and head of the ulna
10. A clinician palpates the prominent point at the back of a flexed elbow. Which structure is being felt?
Head of the ulna
Coronoid process of the ulna
Radial tuberosity
Olecranon of the ulna
11. At the wrist, what normally separates the distal ulna from direct articulation with the carpal bones?
Articular disc of the distal radioulnar joint
Interosseous membrane
Flexor retinaculum
Annular ligament
12. During pronation of the forearm, how does the radius move relative to the ulna?
It remains parallel and moves only proximally.
It moves medially without rotating.
It rotates the ulna around the humerus.
It crosses over the ulna.
13. You are orienting the shafts of an isolated radius and ulna. Which borders should face one another for attachment of the interosseous membrane?
The anterior borders of both bones
The medial border of the radius and lateral border of the ulna
The lateral border of the radius and posterior border of the ulna
The posterior borders of both bones
14. A fall on an outstretched hand causes a typical Colles fracture. Which bone region is primarily involved?
Olecranon of the ulna
Proximal radius
Distal ulna only
Distal radius
15. When comparing their distal ends, which statement is correct?
The ulnar styloid normally projects farther distally than the radial styloid.
The radial styloid normally projects farther distally than the ulnar styloid.
Both styloid processes arise from the radius.
Neither bone has a distal styloid process.
16. An isolated radius is held in anatomical orientation. Which combination correctly positions two of its landmarks?
Radial tuberosity lateral; styloid process medial
Radial tuberosity posterior; styloid process medial
Radial tuberosity medial; styloid process lateral
Radial tuberosity lateral; styloid process posterior