Main blood supply to the head and neck of femur comes from:
**Core Concept**
The main blood supply to the head and neck of the femur is crucial for the survival of the femoral head, especially in conditions like femoral neck fractures. The blood supply is primarily provided by a network of arteries that arise from the medial and lateral circumflex femoral arteries.
**Why the Correct Answer is Right**
The correct answer is the medial circumflex femoral artery (MCF). The MCF arises from the profunda femoris artery and is responsible for supplying the majority of the blood to the head and neck of the femur. The MCF wraps around the posterior aspect of the femur, providing a rich network of vessels that anastomose with the lateral circumflex femoral artery. This network of vessels ensures that the femoral head receives a consistent supply of oxygen and nutrients.
**Why Each Wrong Option is Incorrect**
* **Option A:** The profunda femoris artery is the parent artery of the medial and lateral circumflex femoral arteries, but it is not the direct supplier of blood to the head and neck of the femur.
* **Option B:** The lateral circumflex femoral artery does contribute to the blood supply of the head and neck of the femur, but it is not the primary supplier.
* **Option D:** The gluteal arteries primarily supply the gluteal region and do not directly contribute to the blood supply of the head and neck of the femur.
**Clinical Pearl / High-Yield Fact**
In cases of femoral neck fractures, it is essential to preserve the blood supply to the femoral head to prevent avascular necrosis. The MCF is often damaged in these fractures, leading to a compromised blood supply.
**Correct Answer:** C. Medial circumflex femoral artery.