Upper Limb Anatomy and Injuries Quiz

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Questions and Answers

The carpal tunnel is formed by the extensor retinaculum.

False (B)

The largest carpal bone is the hamate.

False (B)

The scaphoid is the first carpal bone to ossify at 3 years of age.

False (B)

The primary blood supply to the scaphoid is through the palmar branch of the radial artery.

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

Inflammation of the synovial sheath is not painful because the synovial space remains empty.

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

The carpal tunnel is formed by the extensor retinaculum.

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

Carpal tunnel syndrome can lead to paraesthesia, numbness, and motor weakness of thumb muscles due to compression of the ulnar nerve.

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

The flexor retinaculum prevents 'bow stringing' of tendons during wrist flexion.

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

The articular capsule of the wrist joint is thick and tight.

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

The ligament that runs from the styloid process of ulna to triquetral is called the radial collateral ligament.

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

Pulled elbow, also known as subluxation, is a common injury in preschool children aged 1-3 years.

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

The carpometacarpal joint of the thumb is classified as a hinge type of synovial joint.

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

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Study Notes

Carpal Tunnel Anatomy

  • The carpal tunnel is formed by the extensor retinaculum.
  • The largest carpal bone is the hamate.
  • The scaphoid is the first carpal bone to ossify at 3 years of age.
  • The primary blood supply to the scaphoid is through the palmar branch of the radial artery.

Wrist Joint Functionality

  • The flexor retinaculum prevents 'bow stringing' of tendons during wrist flexion.
  • The articular capsule of the wrist joint is thick and tight.

Injuries and Conditions

  • Carpal tunnel syndrome can lead to paraesthesia, numbness, and motor weakness of thumb muscles due to compression of the ulnar nerve.
  • Pulled elbow, also known as subluxation, is a common injury in preschool children aged 1-3 years.

Joint Classification

  • The carpometacarpal joint of the thumb is classified as a hinge type of synovial joint.

Miscellaneous

  • Inflammation of the synovial sheath is not painful because the synovial space remains empty.
  • The ligament that runs from the styloid process of ulna to triquetral is called the radial collateral ligament.

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