olecranon fossa
bone anatomy
Quick Summary
The olecranon fossa is a depression on the posterior side of the humerus, the bone of the upper arm. This fossa receives the olecranon process of the ulna, which is one of the two bones in the forearm. This articulation forms a crucial part of the elbow joint, allowing for the straightening of the arm. The ulna itself has a C-shaped trochlear notch that articulates with the humerus, and the olecranon process forms the point of the elbow. The cubital fossa is a depression on the anterior (front) side of the elbow.123
Summary created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
3 Britannica Sources
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.
