Anatomy of Carpal Bones Quiz
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Questions and Answers

Which carpal bone is characterized as the largest in the proximal row?

  • Lunate
  • Pisiform
  • Triquetrum
  • Scaphoid (correct)

What unique anatomical feature does the hamate bone possess?

  • A deep concavity for capitate articulation
  • A boat shape resembling the scaphoid
  • A pyramidal shape with three articular surfaces
  • A hook-like process called the hamulus (correct)

Which of the following statements about the carpal sulcus is accurate?

  • It is a groove formed by the concave anterior aspect of the carpals. (correct)
  • It allows for the passage of the pisiform and hamulus.
  • It is formed by the flat dorsal surface of the carpals.
  • It is visible from the dorsal view of the wrist.

Which of the following carpals articulates directly with the radius?

<p>Scaphoid (B)</p> Signup and view all the answers

The mnemonic for remembering the carpals begins with which letter for the trapezoid?

<p>T (B)</p> Signup and view all the answers

Which of the following statements about the radius and ulna is accurate?

<p>The ulna articulates with the radius at both proximal and distal radioulnar joints. (D)</p> Signup and view all the answers

What feature distinguishes the proximal radius from the ulna?

<p>It contains a round, disk-like head. (D)</p> Signup and view all the answers

Which process is located on the medial aspect of the distal radius?

<p>Ulnar notch (A)</p> Signup and view all the answers

During pronation of the forearm, what happens to the radius in relation to the ulna?

<p>The radius crosses over the ulna. (D)</p> Signup and view all the answers

Which feature is primarily associated with the proximal ulna?

<p>Trochlear notch (C)</p> Signup and view all the answers

Flashcards

Scaphoid (Carpal)

Largest carpal bone in the proximal row, boat-shaped, often fractured, articulates with the radius.

Lunate (Carpal)

Moon-shaped carpal in the proximal row; articulates with the capitate.

Triquetrum (Carpal)

Third carpal bone in the proximal row, pyramidal shape, articulates with the pisiform.

Pisiform (Carpal)

Small, pea-shaped carpal bone anterior to the triquetrum.

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Carpal Tunnel

A groove formed by the concave anterior aspect of the carpals; nerves and tendons pass through

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Radius

The bone on the thumb side of the forearm, forming the lateral side. It's smaller than the ulna and participates in wrist and hand rotation.

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Ulna

The long, bony structure on the pinky side of the forearm, primarily responsible for elbow formation. It's the larger of the two forearm bones.

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Proximal Radioulnar Joint

This joint is located at the elbow where the head of the radius articulates (connects) with the radial notch of the ulna. It facilitates forearm rotation.

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Distal Radioulnar Joint

This joint is located near the wrist where the distal end of the radius connects with the ulna. It allows for hand and forearm rotation.

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Pronation

The rotational movement of the forearm that brings the palm facing down or backward. During pronation, the radius crosses over the ulna.

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