Accessory obturator aery is a branch of
**Core Concept**
The **accessory obturator artery** is an anatomical variation that provides additional blood supply to the region of the obturator artery. It is related to the **iliac vessels** and the **obturator foramen**. Understanding its origin is crucial for surgical and radiological procedures.
**Why the Correct Answer is Right**
Given the typical anatomy, the **inferior epigastric artery**, a branch of the **external iliac artery**, is known to sometimes give off the **accessory obturator artery**. This branch then passes through the obturator foramen to supply the region. The mechanism involves the anastomosis between the **inferior epigastric** and **obturator arteries**, ensuring a collateral circulation.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not typically associated with the origin of the accessory obturator artery.
**Option B:** Incorrect as it does not directly relate to the common origin of the accessory obturator artery.
**Option D:** Incorrect because, although related to pelvic anatomy, it is not the primary source of the accessory obturator artery.
**Clinical Pearl / High-Yield Fact**
The existence of an **accessory obturator artery** is significant during pelvic surgeries, as it can be a source of bleeding if not identified and ligated. Knowing its possible origin from the **inferior epigastric artery** is crucial for surgeons.
**Correct Answer:** D. Inferior epigastric artery