KIN 2320 Lecture Notes - Lecture 26: Ulnar Styloid Process, Trochlear Notch, Radial Notch
19 Nov 2018
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Document Summary
The ulna, the stabilizing bone of the forearm, is the medial and longer of the two forearm bones. It proximal end has 2 prominent projections the olecranon posteriorly and the coronoid process anteriorly, they form the walls of the trochlear notch. The trochlear notch of the ulna articulates with the trochlea of the humerus. Inferior to the coronoid process is the tuberosity of the ulna. On the lateral side of the coronoid process is smooth, rounded, concavity, the radial notch, which articulates with the head of the radius. Distal to the radial notch is a prominent ridge the supinator crest, and between it and the distal part of the coronoid process is a concavity, the supinator fossa. Proximally, the shaft of the ulna is thick, but it tappers, diminishing in diameter distally. At its narrow distal end is the rounded head of the ulna with the small conical ulnar styloid process.
