Which of the following is commonest source of Extradural haemorrhage –
**Core Concept**
Extradural hemorrhage, also known as epidural hemorrhage, is a type of traumatic brain injury where blood accumulates between the dura mater and the skull. The underlying cause is often a **head injury** that results in a fracture of the skull, leading to damage of an artery.
**Why the Correct Answer is Right**
The correct answer is related to the anatomy of the skull and the blood vessels that run close to it. The **middle meningeal artery** is commonly involved in extradural hemorrhages due to its location near the inner surface of the skull. When a head injury occurs, this artery can be damaged, leading to bleeding into the extradural space.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not directly related to the common cause of extradural hemorrhage.
**Option B:** This option is also incorrect as it is not typically associated with extradural hemorrhage.
**Option C:** This option is incorrect as it is not the most common source of extradural hemorrhage.
**Option D:** This option is not the correct answer as the middle meningeal artery is the most common source.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that extradural hemorrhages are often associated with a **lucid interval**, where the patient may appear fine after the initial injury, only to deteriorate rapidly as the hemorrhage expands.
**Correct Answer:** D. Middle meningeal artery.