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AnatomyUpper limbElbow and forearmCoronoid process of ulna
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AnatomyUpper limbElbow and forearmCoronoid process of ulna

Coronoid process of ulna

Author: Roberto Grujičić, MD • Reviewer: Dimitrios Mytilinaios, MD, PhD
Last reviewed: October 30, 2023
Reading time: 2 minutes

Recommended video: Radius and ulna [14:04]
Overview of the bones that define the forearm, the radius and ulna.
Coronoid process of ulna
Processus coronoideus ulnae
1/2
Synonyms: none

The ulna is one of two bones of the forearm, together with the radius. Its proximal end is larger and specialized for articulation with the humerus proximally and radius laterally in order to form the elbow joint. 

The coronoid process is the smaller of two projections located on the proximal end of the ulna. The larger projection is called the olecranon. 

The coronoid process is pyramid-shaped and it projects anteriorly. It has a base, apex and four surfaces. The base is continuous with the body of the ulna, while the apex is directed in a superior direction. During flexion of the elbow the apex is accommodated in the coronoid fossa of the humerus. The lateral surface of the coronoid process forms the radial notch (for the head of the radius), while the superior surface forms the trochlear notch (for the trochlea of the humerus). 

The main function of the projections of the proximal ulna is to stabilize the elbow joint and prevent the hyperflexion of the elbow. In addition, it serves as the attachment for ligaments and muscles that act on the elbow joint.

Terminology English: Coronoid process of ulna
Latin: Processus coronoideus ulnae
Location Proximal aspect of ulna
Function Articulation with the humerus, stabilises the elbow joint, prevents hyperflexion of the elbow

Learn everything about the anatomy and structure of the elbow joint with the following study unit:

Elbow joint Explore study unit

Sources

All content published on Kenhub is reviewed by medical and anatomy experts. The information we provide is grounded on academic literature and peer-reviewed research. Kenhub does not provide medical advice. You can learn more about our content creation and review standards by reading our content quality guidelines.
  • Frank H.Netter MD: Atlas of Human Anatomy, 5th Edition, Elsevier Saunders.
  • Chummy S.Sinnatamby: Last’s Anatomy Regional and Applied, 12th Edition, Churchill Livingstone Elsevier.
  • Drake RL, Vogl AW, Mitchell WMA. Gray’s anatomy for students. 4th ed. 2020.
  • Moore, K. L., Dalley, A. F., & Agur, A. (2017). Clinically oriented anatomy (8th ed.). Lippincott Williams and Wilkins.

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