After rupture of middle meningeal artery bleeding occurs in which region –
**Core Concept:**
The middle meningeal artery is a branch of the external carotid artery that supplies blood to the meninges, which are the protective membranes covering the brain and spinal cord. When this artery ruptures, it can lead to bleeding in the surrounding region.
**Why the Correct Answer is Right:**
The correct answer is C, "paranasal sinus." The middle meningeal artery branches into two main branches: the frontotemporal and the sphenopalatine branches. Rupture of the middle meningeal artery typically results in bleeding into the paranasal sinus, which is one of the sphenopalatine branches' destinations.
**Why Each Wrong Option is Incorrect:**
A) "Petrous part of the temporal bone" is incorrect because a petrous part of the temporal bone is not the direct destination of the middle meningeal artery.
B) "Sphenoid sinus" is incorrect as well, as the sphenopalatine branch of the middle meningeal artery supplies the sphenoid sinus, but bleeding into the sphenoid sinus is less common compared to paranasal sinus.
D) "Ethmoid sinus" is incorrect, as the ethmoid sinus is supplied by the superior ophthalmic artery, which is a branch of the internal carotid artery, not the middle meningeal artery.
**Clinical Pearl / High-Yield Fact:**
Understanding the anatomy of the middle meningeal artery and its branches is crucial for accurate diagnosis and management of potential complications, such as meningitis or epidural hematoma, which can arise from rupture of the artery.
**Correct Answer:** C (paranasal sinus)