Artery, Circumflex Humerus, Posterior (A. Circumflexa Humeri Posterior, Pna, Bna)

Posterior humeral circumflex artery (A. Circumflexa Humeri Posterior, PNA, BNA): Overview and anatomical description

Introduction:
The anatomy of the human body is a complex and amazing system that includes many arteries, veins and other blood vessels. One of the important arteries providing blood supply to the upper limb is the posterior circumflex artery of the humerus (A. Circumflexa Humeri Posterior). In this article we will look at this artery, its anatomy and role in the body.

Anatomy:
The posterior circumflex humeral artery is a branch of the brachial artery (A. Brachialis) and provides blood supply to the posterior part of the shoulder. It runs around the posterior surface of the neck of the humerus and forms an anatomical connection between the anterior and posterior blood supply of the shoulder.

Blood flow paths:
The posterior humeral circumflex artery has two main flow paths known as the PNA (Posterior Non-Anastomotic) and BNA (Branching Non-Anastomotic) pathways.

1. PNA Path:
   The PNA pathway is the primary blood flow pathway for the posterior circumflex humeral artery. It penetrates into the deep layers of the shoulder muscles and forms a network of anastomoses with other arteries that supply blood to the shoulder. This pathway plays an important role in maintaining blood supply to the shoulder muscles and ensuring their normal functioning.

2. BNA Path:
   The BNA pathway is an additional blood flow pathway for the posterior circumflex humeral artery. In this path, the artery branches and forms small anatomical connections with other vessels in the shoulder area. Although this pathway is not a major one, it contributes to the overall circulatory system of the shoulder.

Role in the body:
The posterior humeral circumflex artery plays an important role in providing blood supply to the back of the shoulder and its associated muscles and tissues. By delivering oxygen and nutrients to these areas, it ensures their normal functioning and maintains optimal health of the upper limb.

Conclusion:
The posterior humeral circumflex artery is an important component of the shoulder's circulatory system. Its anatomy and blood flow pathways, such as the PNA and BNA, provide efficient blood supply to the posterior shoulder and its muscles. Understanding the anatomy and function of this artery is of great importance for medical practice, especially when performing surgical interventions or diagnosing diseases in the shoulder area.

It is important to note that this article provides a general overview of the posterior humeral circumflex artery and is not a substitute for consultation with a qualified healthcare professional. For any questions or concerns regarding shoulder anatomy or health, it is recommended that you consult a physician for individual advice and diagnosis.

Source:
List of anatomical terms.

Humeral circumflex artery, posterior (A. circumfexa humerii posterior)

General characteristics The circumflex artery of the humerus, posterior (circumfexa humerii lateralis, lat. lat. A. circumfleksa brachii lateralis) is the name of the artery that is located in the groove, which, on the inside of the arm, forms the shoulder region. It wraps around the humerus from behind and on both sides of the humerus. Anatomically, it connects to the subclavian artery and runs along its medial side. More than