Anatomical neck of humerus

Anatomical Neck of Humerus

Anterior view of the humerus showing the anatomical neck (labelled as 3)

The Anatomical Neck of Humerus is a part of the humerus bone, which is located in the upper arm of the human body. It is a significant feature of the humerus, as it demarcates the upper limit of the shaft of the humerus and separates the head of the humerus from the tubercles.

Structure

The anatomical neck of humerus is a slightly constricted area that is located immediately below the head and above the greater and lesser tubercles of the humerus. It is a groove that encircles the bone, marking the line of the former epiphyseal plate.

Function

The anatomical neck of the humerus serves as the point of attachment for the capsular ligament of the shoulder joint. This ligament helps in stabilizing the shoulder joint and allows for a wide range of motion.

Clinical Significance

Fractures of the anatomical neck of the humerus are relatively rare but can be serious due to the close proximity to the axillary nerve and posterior circumflex humeral artery. Damage to these structures can lead to significant complications such as paralysis or ischemia.

See Also

• Humerus
• Head of the humerus
• Greater tubercle
• Lesser tubercle
• Shaft (bone)