The blood supply of anterior cruciate ligament (ACL) is primarily derived from –
**Core Concept**
The anterior cruciate ligament (ACL) is a critical stabilizer of the knee joint, and its blood supply plays a crucial role in its development, maintenance, and repair. The ACL receives its blood supply from multiple sources, which are essential for its function and integrity.
**Why the Correct Answer is Right**
The correct answer is derived from the fact that the ACL receives its primary blood supply from the middle genicular artery, which is a branch of the popliteal artery. This artery provides a rich network of vessels that supply the ACL with oxygenated blood. The middle genicular artery is responsible for the majority of the ACL's blood supply, making it a vital component of the ligament's maintenance and function.
**Why Each Wrong Option is Incorrect**
* **Option A:** The lateral genicular artery is a branch of the popliteal artery, but it primarily supplies the lateral aspect of the knee joint, rather than the ACL.
* **Option B:** The medial genicular artery is also a branch of the popliteal artery, but it primarily supplies the medial aspect of the knee joint, rather than the ACL.
* **Option D:** The superficial medial and lateral circumflex femoral arteries are not directly involved in the blood supply of the ACL.
**Clinical Pearl / High-Yield Fact**
It is essential to note that the ACL's blood supply is limited compared to other ligaments in the body, which makes it more susceptible to injury and degeneration. This knowledge is crucial for understanding the pathophysiology of ACL injuries and developing effective treatment strategies.
**Correct Answer:** C. The middle genicular artery.