Coronoid fossa of the humerus

Coronoid fossa of the humerus

The coronoid fossa of the humerus is a small depression located on the anterior surface of the humerus, one of the long bones in the upper limb. This anatomical feature is situated just above the trochlea of the humerus and serves as a space to accommodate the coronoid process of the ulna when the elbow joint is flexed.

Anatomy

The coronoid fossa is part of the distal end of the humerus, which also includes the capitulum, the trochlea, the olecranon fossa, and the radial fossa. The fossa is shallow and allows for the smooth movement of the ulna during elbow flexion. It is bordered by the medial and lateral epicondyles of the humerus.

Function

The primary function of the coronoid fossa is to provide space for the coronoid process of the ulna during the flexion of the elbow. This interaction is crucial for the full range of motion in the elbow joint, allowing the forearm to move closer to the upper arm.

Clinical Significance

Injuries or abnormalities involving the coronoid fossa can affect elbow movement and function. Conditions such as fractures of the humerus or arthritis can lead to complications in this area. Proper understanding of the coronoid fossa's anatomy is essential for orthopedic surgeons when performing procedures involving the elbow joint.

Related Structures

• Humerus
• Ulna
• Elbow joint
• Trochlea
• Capitulum
• Olecranon fossa
• Radial fossa
• Coronoid process

See Also

• Anatomy of the human arm
• Skeletal system
• Orthopedic surgery