HUMB1004 Study Guide - Final Guide: Ulnar Notch Of The Radius, Distal Radioulnar Articulation, Ulnar Collateral Ligament Of Elbow Joint
4 Aug 2018
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Document Summary
Shaft : has anterior, posterior and interosseous borders. Interosseus border between the bones, will face the radius, which is lateral so interosseous border is on lateral ulna. Joints: proximal radio ulnar joint radial notch of ulna + radial head, radius sits in its annular ligament and crosses over ulnar in pronation and back in supination. Radius rotates on its long axis to provide pro/sup: humero-ulnar joint trochlear of humerus + trochlear notch of ulna, pronation and supination, humero-radial head of radius + capitulum of humerus. Syndesmotic joint 4 the transmission of force. Directs stresses/transmission of forces: radius is thicker distally + ulna is thicker proximally. If we are to absorb force, we need to take the large force from the wrist and transfer them to the ulna, the ulna can then transfer them to the elbow to be absorbed. Muscle attachment: stable, fibrous base for muscle origination. Binds radial head and neck to ulna and keeps joint stability.
