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Quizzes > Health & Medicine

Radius and Ulna Quiz: Label the Right Forearm Bones

Quick, free ulna labeling quiz to test your knowledge. Instant results.

Editorial: Review CompletedCreated By: Alicia ZabalaUpdated Aug 27, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration for forearm anatomy quiz featuring radius and ulna on a coral background

This radius and ulna quiz helps you label the right forearm bones and spot key landmarks fast. Practice at your own pace, then widen your review with the elbow anatomy quiz to see how the joints connect. Build wrist skills with the carpal bones quiz, and finish with a quick run through the upper limb bones quiz.

On the right radius, which landmark is the main insertion site of the biceps brachii tendon?
Radial tuberosity
Lister's tubercle
Ulnar notch of radius
Radial styloid process
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Which structure on the right ulna forms the sharp posterior projection of the elbow where the triceps tendon inserts?
Supinator crest
Ulnar head
Coronoid process
Olecranon
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The ulnar notch of the right radius directly participates in which joint?
Proximal radioulnar joint
Radiocarpal joint with the scaphoid
Distal radioulnar joint
Humeroradial joint
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Which carpal bones articulate directly with the distal articular surface of the right radius?
Pisiform and scaphoid
Lunate and triquetrum
Scaphoid and lunate
Scaphoid and triquetrum
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The radial styloid process of the right forearm lies, relative to the ulnar styloid process,
More distal
More posterior
More proximal
At the same level
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The trochlear notch is formed by which two right ulnar structures?
Olecranon and coronoid process
Coronoid process and supinator crest
Olecranon and ulnar styloid
Ulnar head and radial notch
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The radial notch on the right ulna is located on which aspect of the proximal ulna?
Lateral
Posterior distal
Anterior midshaft
Medial
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The concave depression on the superior surface of the right radial head that articulates with the capitulum is called the
Fovea of the radial head
Radial notch of ulna
Ulnar coronoid fossa
Trochlear notch
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On the right ulna, which landmark is located just distal to the coronoid process on the anterior surface and serves as an insertion for brachialis?
Ulnar tuberosity
Olecranon
Styloid process of ulna
Supinator crest
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On the right radius, the interosseous border is located on which aspect of the shaft?
Lateral
Posterior
Medial
Anterior
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On the right radius, the roughened area on the lateral midshaft where pronator teres inserts is best described as
A rough oval on the lateral surface midway down the shaft
A ridge on the medial border near the tuberosity
A fossa on the radial head
A groove on the posterior distal radius
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On the distal posterior surface of the right radius, Lister's tubercle serves primarily to
Act as a pulley for extensor pollicis longus
Articulate with the lunate
Transmit the ulnar nerve
Serve as a biceps tendon insertion
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Which border of the right ulna gives attachment to the interosseous membrane?
Anterior border
Medial border
Posterior border
Lateral (interosseous) border
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Which surface of the right radius is most concave and provides a bed for flexor muscles in the distal forearm?
Posterior surface
Lateral surface
Anterior surface
Medial surface
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On the distal end of the right radius, the groove immediately ulnar to Lister's tubercle transmits which tendon?
Extensor carpi ulnaris (ECU)
Flexor pollicis longus (FPL)
Abductor pollicis longus (APL)
Extensor pollicis longus (EPL)
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Which landmark on the right ulna provides attachment for the ulnar collateral ligament of the elbow at the sublime tubercle?
Tip of the olecranon
Radial notch of ulna
Ulnar styloid process
Medial aspect of the coronoid process
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On the right radius, the oblique line on the anterior surface provides origin for which muscle?
Extensor carpi radialis longus
Triceps brachii
Flexor digitorum superficialis (radial slip)
Brachialis
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On the right ulna, the supinator crest is positioned
At the tip of the olecranon
Distal to the styloid process
Anterior to the ulnar tuberosity
Posterior to the radial notch on the proximal ulna
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On the right radius, the dorsal groove most lateral on the distal end transmits which tendons?
Extensor carpi ulnaris
Abductor pollicis longus and extensor pollicis brevis
Extensor pollicis longus
Extensor digitorum and extensor indicis
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The ridge separating the scaphoid and lunate facets on the distal right radius is best described as
Radial tuberosity
Lister's tubercle
A subtle crest on the distal articular surface
Ulnar notch
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Study Outcomes

  1. Identify Anatomical Landmarks -

    Recognize and name key bony landmarks on the right radius and ulna, such as the olecranon process and radial head.

  2. Distinguish Radius vs. Ulna Features -

    Differentiate between unique morphological characteristics of the radius and ulna in forearm anatomy.

  3. Label Radius and Ulna Structures -

    Accurately place labels on each part of the radius and ulna in an interactive quiz format.

  4. Explain Functional Roles of Landmarks -

    Describe the anatomical location and functional significance of radius and ulna features like the trochlear notch and radial tuberosity.

  5. Apply Knowledge to Movement -

    Use your understanding of radius and ulna anatomy to predict movements such as pronation and supination of the forearm.

  6. Assess Your Quiz Proficiency -

    Evaluate your performance with instant feedback and scoring to identify areas for targeted review.

Cheat Sheet

  1. Olecranon Process & Trochlear Notch -

    The olecranon is the prominent proximal tip of the ulna that fits into the trochlear notch of the humerus, forming the hinge for elbow extension and flexion. Gray's Anatomy notes its lever arm enhances triceps brachii efficiency in forearm extension and makes it a staple in ulna and radius labeling quizzes. Mnemonic: "OLEO on top" helps recall that the olecranon sits superiorly like a lock on a door hinge.

  2. Radial Head, Neck & Tuberosity -

    The rounded radial head articulates with the capitulum of the humerus, permitting pronation and supination as detailed in Netter's Atlas of Human Anatomy. Just distal, the radial tuberosity on the right radius bone serves as the biceps brachii insertion site, crucial for forearm flexion and supination. Use the shortcut "BRIT" (Biceps Insertion at Radial Tuberosity) to lock in this landmark.

  3. Interosseous Membrane & Crests -

    The interosseous membrane spans between the interosseous crests of the radius and ulna, distributing load and stabilizing the forearm during weight-bearing, as described by the American Academy of Orthopaedic Surgeons. Its dense fibrous structure connects the bones like a sail, transmitting forces proximally. Remember the "strong IRON sheet" mnemonic: I-fibers R-einforce O-blique N-etwork.

  4. Distal Radioulnar Joint & Ulnar Styloid -

    The sigmoid (ulnar) notch of the distal radius and the head of the ulna form the distal radioulnar joint, essential for smooth forearm rotation under TFCC (triangular fibrocartilage complex) support. The ulnar styloid process is a palpable point just medial to the wrist that helps diagnose joint instability in the right radius and ulna. Mnemonic: "Tough Fibers Create Connection" helps recall the TFCC's role in wrist stability.

  5. Lister's Tubercle & Radial Styloid Process -

    Lister's tubercle, a dorsal prominence on the distal radius, acts as a pulley for the extensor pollicis longus tendon; pinpointed on lateral radiographs and cadaveric specimens. The radial styloid process projects laterally at the wrist, forming the radial boundary of the anatomical snuffbox. Use "Right Radius Rendezvous" to trigger recall of these two lateral landmarks in your radius and ulna bone quiz.

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