Aery forming anastomosis around surgical neck humerus
**Core Concept**
The formation of anastomosis around the surgical neck of the humerus refers to the network of blood vessels that connect and bypass each other to maintain blood supply to the humerus, particularly after a surgical intervention. This anastomotic network is crucial for ensuring the survival of the bone tissue.
**Why the Correct Answer is Right**
The primary arteries responsible for forming this anastomosis are the circumflex humeral artery and the profunda brachii artery. These arteries branch off from the axillary artery and create a network of vessels that anastomose around the surgical neck of the humerus. This anastomosis is facilitated by the presence of multiple small vessels, including the radial collateral and the medial collateral arteries, which connect to form a robust network. This network helps to maintain blood supply to the humerus, reducing the risk of ischemia and necrosis.
**Why Each Wrong Option is Incorrect**
**Option A:** The suprascapular artery does not contribute significantly to the anastomosis around the surgical neck of the humerus.
**Option B:** Although the brachial artery does supply blood to the arm, it is not directly involved in forming the anastomosis around the surgical neck of the humerus.
**Option C:** The subscapular artery primarily supplies the scapula and is not a significant contributor to the anastomotic network around the surgical neck of the humerus.
**Clinical Pearl / High-Yield Fact**
It is essential to recognize the importance of preserving the blood supply to the humerus during surgical procedures, particularly around the surgical neck. This is crucial for preventing complications such as humeral nonunion or avascular necrosis.
**Correct Answer: C. The subscapular artery primarily supplies the scapula and is not a significant contributor to the anastomotic network around the surgical neck of the humerus.