Radius

Question 1

Radial Tuberosity

Answer 1

It’s a blunt and variable shaped structure on the anteromedial side of the proximal radial shaft. It marks the site of the bicep brachii muscle.

Question 2

Oblique Line

Answer 2

On the anterior surface of the shaft. It spirals inferolaterally from its origin at the base of the radial tuberosity.

Question 3

Interosseous Crest

Answer 3

The sharp medial edge of the radial shaft. It serves as the attachment site for a fibrous membrane (interosseous membrane) which divides the forearm into two compartments, anterior and posterior.

Question 4

Styloid Process

Answer 4

Sharp projection on the lateral side of the distal radius.

Question 5

Distal Articular Surface

Answer 5

Articulates with the wrist bones- The lunate on the medial side and the scaphoid on the lateral side.

Question 6

Ulnar Notch

Answer 6

Concave articular hollow on the medial distal corner of the radius. It articulates with the distal end of the ulnar.