Wrist Ligaments and Anatomy Quiz
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Questions and Answers

Which ligament of the wrist extends from the styloid process of the radius to the lateral aspect of the scaphoid and trapezium bones?

  • Radial collateral ligament (correct)
  • Palmar radiocarpal ligament
  • Dorsal radiocarpal ligament
  • Triangular fibrocartilage complex (TFCC)

    • What is the name of the two special turning or bending positions of the hand and wrist that demonstrate medial and lateral aspects of the carpal region?

  • Ulnar Deviation (correct)
  • Supination
  • Radial Deviation
  • Pronation

    • Of the two positions listed in the previous question, which is most commonly performed to detect a fracture of the scaphoid bone?

  • Radial Deviation
  • Supination
  • Pronation
  • Ulnar Deviation (correct)

    • How does the forearm appear radiographically if pronated for a PA projection?

    <p>The proximal radius crosses over the ulna</p> Signup and view all the answers

    The two important fat stripes or bands around the wrist joint are:

    <p>Scaphoid fat stripe</p> Signup and view all the answers

    The fat pads around the elbow joint are valuable diagnostic indicators if the following three technical/positioning requirements are met with the lateral position:

    <p>All of the above</p> Signup and view all the answers

    True/False: If the posterior fat pad of the elbow is not visible radiographically, it suggests that a non-obvious radial head or neck fracture is present.

    <p>True</p> Signup and view all the answers

    For a PA oblique projection of the second digit, where is the CR centered?

    <p>PIP joint</p> Signup and view all the answers

    Why is it important to keep the affected digit parallel to the IR for the PA oblique and lateral projections?

    <p>All of the above</p> Signup and view all the answers

    Why is the AP projection of the thumb recommended instead of the PA?

    <p>The AP position produces a decrease in OID and increased resolution</p> Signup and view all the answers

    Which projection of the thumb is achieved naturally by placing the palmar surface of the hand in contact with the IR?

    <p>PA oblique</p> Signup and view all the answers

    What size should be used for a thumb projection?

    <p>8 x 10&quot;</p> Signup and view all the answers

    A sesamoid bone is frequently found adjacent to which joint of the thumb?

    <p>MCP - metacarpophalangeal</p> Signup and view all the answers

    What is the best routine projection to demonstrate the scaphoid fat pad?

    <p>Oblique wrist</p> Signup and view all the answers

    What is the best routine projection to demonstrate the pronator fat stripe?

    <p>Lateral wrist</p> Signup and view all the answers

    What are the two radiographic criteria used to determine whether rotation is present on the PA projection of the digits?

    <p>Symmetric appearance of both sides of the shafts of phalanges and distal metacarpals</p> Signup and view all the answers

    Which positioning modification should be used for a study of the second digit to reduce distortion with a PA Oblique projection?

    <p>Decrease OID</p> Signup and view all the answers

    Which technical factor is most commonly used for upper limb radiography to visualize soft tissue and trabecular markings of all bones?

    <p>$60-80$ kV range</p> Signup and view all the answers

    What is the general rule for collimation for upper limb radiography?

    <p>Collimation borders should be visible on all four sides if the IR is large enough to allow this without cutting off essential anatomy.</p> Signup and view all the answers

    What is a radiographic procedure that uses contrast media injected into the joint capsule to visualize soft tissue pathology of the wrist, elbow, and shoulder joints?

    <p>Arthrography</p> Signup and view all the answers

    Which radiographic view is used for the second through fifth digits of the hand?

    <p>$45^{ ext{o}}$ anteroposterior (PA) oblique view</p> Signup and view all the answers

    What is required for upper limb studies performed on patients who are of childbearing age?

    <p><em>Lead (protective) shielding</em></p> Signup and view all the answers

    True/False: Guardians of young pediatric patients who are having upper limb studies can be asked to hold their child during the radiographic study.

    <p>True</p> Signup and view all the answers

    True/False: Lead (protective) shielding is only required for upper limb studies performed on patients who are of childbearing age.

    <p>False</p> Signup and view all the answers

    What parts are labeled in figs 4.8 and 4.9?

    <p>Radial tubercle, Radial neck, Capitulum, Lateral epicondyle, Olecranon fossa, Medial epicondyle, Trochlea, Coronoid tubercle, Olecranon process, Superimposed humeral epicondyles, Radial head, Radial neck, Radial tuberosity, Outer ridges of trochlea and capitulum, Trochlear sulcus (groove), Trochlear notch.</p> Signup and view all the answers

    What parts are labeled in figs 4.10 and 4.11?

    <p>Radial tubercle (tuberosity), Radial neck, Radial head, Capitulum, Lateral epicondyle, Coronoid process, Trochlea, Olecranon process.</p> Signup and view all the answers

    Study Notes

    Wrist Ligaments

    • The ligament that extends from the styloid process of the radius to the lateral aspect of the scaphoid and trapezium bones is not specified.

    Hand and Wrist Positions

    • The two special turning or bending positions of the hand and wrist are medial and lateral rotations, which demonstrate medial and lateral aspects of the carpal region.
    • Lateral rotation is most commonly performed to detect a fracture of the scaphoid bone.

    Forearm Radiography

    • If pronated for a PA projection, the forearm appears radiographically.

    Fat Stripes around the Wrist Joint

    • The two important fat stripes or bands around the wrist joint are not specified.

    Fat Pads around the Elbow Joint

    • The fat pads around the elbow joint are valuable diagnostic indicators if the following three technical/positioning requirements are met with the lateral position:
      • Not specified

    Posterior Fat Pad of the Elbow

    • If the posterior fat pad of the elbow is not visible radiographically, it suggests that a non-obvious radial head or neck fracture is not present.

    PA Oblique Projection of the Second Digit

    • For a PA oblique projection of the second digit, the CR is centered at the PIP joint.

    Digit Positions

    • It is important to keep the affected digit parallel to the IR for the PA oblique and lateral projections to prevent distortion.

    Thumb Projections

    • The AP projection of the thumb is recommended instead of the PA projection.
    • The PA projection of the thumb is achieved naturally by placing the palmar surface of the hand in contact with the IR.
    • A thumb projection requires a small size.

    Sesamoid Bone

    • A sesamoid bone is frequently found adjacent to the MCP joint of the thumb.

    Scaphoid Fat Pad

    • The best routine projection to demonstrate the scaphoid fat pad is not specified.

    Pronator Fat Stripe

    • The best routine projection to demonstrate the pronator fat stripe is not specified.

    PA Projection of the Digits

    • The two radiographic criteria used to determine whether rotation is present on the PA projection of the digits are:
      • Not specified

    PA Oblique Projection of the Second Digit

    • A positioning modification to reduce distortion with a PA Oblique projection involves rotating the hand medially.

    Technical Factors

    • The technical factor most commonly used for upper limb radiography to visualize soft tissue and trabecular markings of all bones is low kV.

    Collimation

    • The general rule for collimation for upper limb radiography is to collimate to the area of interest.

    Radiographic Procedure

    • A radiographic procedure that uses contrast media injected into the joint capsule to visualize soft tissue pathology of the wrist, elbow, and shoulder joints is arthrography.

    Hand Radiography

    • The radiographic view used for the second through fifth digits of the hand is the PA oblique projection.

    Patient Preparation

    • For upper limb studies performed on patients who are of childbearing age, a pregnancy declaration is required.

    Guardians of Pediatric Patients

    • True: Guardians of young pediatric patients who are having upper limb studies can be asked to hold their child during the radiographic study.

    Lead Shielding

    • False: Lead (protective) shielding is required for all upper limb studies, regardless of patient age.

    Figure Labels

    • Figs 4.8 and 4.9 label the wrist joint and surrounding bones.
    • Figs 4.10 and 4.11 label the elbow joint and surrounding bones.

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    Description

    Test your knowledge of the ligaments and anatomy of the wrist joint with this true/false and identification quiz. Learn about the ulnar, radial collateral ligaments, dorsal radiocarpal, palmar radiocarpal, triangular fibrocartilage complex (TFCC), scapulolunate, lunotriquetral ligaments, and more.

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