Skull, Meninges and Cranial Cavity MCQs

Anatomy · 35 free questions with answers & explanations.

1. An epidural hematoma following temporal bone fracture is caused by rupture of which artery, and in which meningeal space does blood accumulate?
2. The pterion is the junction of which four bones, and why is it clinically significant?
3. A 25-year-old involved in a road traffic accident develops a lucid interval followed by rapid deterioration and loss of consciousness. CT brain shows a biconvex (lenticular) hyperdense haematoma temporally with a midline shift. The middle meningeal artery — responsible for the haematoma — is a branch of which parent vessel and runs in which layer?
4. An elderly patient with dilated cerebral veins develops a bilateral chronic subdural haematoma after a trivial head injury. These bridging veins drain into which sinus, making them susceptible to tearing?
5. A 65-year-old patient has a unilateral slowly enlarging mass at the vertex of the skull producing hyperostosis on CT. The most likely meningioma variant is parasagittal. Through which venous sinus does the meningioma spread intracranially to cause venous hypertension?
6. In a patient with raised intracranial pressure, cerebrospinal fluid can drain through which route to the lymphatics of the nasal mucosa — accounting for up to 50% of CSF absorption in some studies?
7. An extradural haematoma classically results from rupture of the middle meningeal artery. The middle meningeal artery enters the cranium through which foramen and runs in the epidural space?
8. The falx cerebri and tentorium cerebelli are folds of dura mater. At the tentorial notch (incisura), uncal herniation from supratentorial mass lesions first compresses which cranial nerve, producing a fixed dilated pupil?
9. A patient with a basal skull fracture through the petrous temporal bone may develop a CSF otorrhea with Battle's sign. The CSF leaks via which anatomical route?
10. The cavernous sinus receives venous drainage from the ophthalmic veins and communicates anteriorly with the pterygoid venous plexus through which foramen, creating a risk of septic cavernous sinus thrombosis from facial infections?
11. A 70-year-old patient on anticoagulants falls and presents with gradually worsening headache, confusion, and ipsilateral pupillary dilation over 3 weeks. A crescent-shaped hypodense collection is seen on CT over the cerebral convexity. This is consistent with:
12. The pterion is the thinnest part of the lateral skull wall. Deep to it runs which artery, and at which point does it enter the skull?
13. A patient presents to the emergency room 6 hours after a temporal head trauma with lucid interval followed by rapid deterioration. CT shows a biconvex (lenticular) hyperdense hematoma. The hematoma is most likely to be between which two layers?
14. A 50-year-old with chronic meningitis is found to have communicating hydrocephalus. Which arachnoid structures are responsible for CSF absorption into the venous sinuses, and where are they maximally concentrated?
15. A patient with a base of skull fracture through the cribriform plate of the ethmoid bone presents with CSF rhinorrhea and bilateral periorbital bruising. Loss of which sense is most specific for cribriform plate injury?
16. An extradural haematoma classically results from rupture of which vessel following a temporal bone fracture?
17. Following a temporal bone fracture, a patient develops an epidural haematoma with the classical 'lucid interval'. The middle meningeal artery runs in a groove on the temporal bone. At which point is it most vulnerable to rupture?
18. The cavernous sinus is a dural venous sinus in the middle cranial fossa. A cavernous sinus thrombosis (from facial infection via the dangerous area of face) would affect multiple cranial nerves. Which nerve runs WITHIN the substance of the lateral wall of the cavernous sinus?
19. A patient develops a chronic subdural haematoma. The haematoma accumulates in the potential space between the dural border cell layer and the arachnoid membrane. Which meningeal layer is actually split to create this subdural space, and why does it bleed slowly?
20. Cavernous sinus thrombosis can spread from facial skin infections because of communication with facial veins. The cavernous sinus communicates directly with the facial vein via which venous route?
21. An extradural haematoma classically results from rupture of the middle meningeal artery after a temporal bone fracture. The middle meningeal artery enters the skull via:
22. Cavernous sinus thrombosis, a dangerous complication of facial/paranasal infections, involves the valveless venous communication via which vein that allows spread from the 'danger triangle' of the face?
23. The cavernous sinus contains several cranial nerves within its lateral wall and the internal carotid artery within its cavity. Which nerve is most susceptible to damage by a cavernous sinus thrombosis, because it runs freely within the sinus lumen rather than in the lateral wall?
24. A middle meningeal artery tear causing extradural haematoma typically follows a fracture of which skull bone and at which point?
25. The middle meningeal artery, whose injury causes epidural hematoma, is a branch of which vessel and enters the skull through which foramen?
26. An extradural haematoma classically follows rupture of the middle meningeal artery. At which point is this artery most vulnerable to fracture of the pterion?
27. The arachnoid granulations (Pacchionian granulations) project into which dural sinus and function in CSF absorption?
28. The middle meningeal artery enters the skull through which foramen and runs in a groove on which bone? Rupture of this artery from a temporal bone fracture produces which haematoma type?
29. The cavernous sinus lies lateral to the sella turcica and contains multiple important structures. Which cranial nerve travels within the substance of the lateral wall of the cavernous sinus but NOT through its interior?
30. The pterion is the H-shaped suture junction on the lateral skull where four bones meet. It overlies which important structure, and why is a fracture here clinically significant?
31. The middle meningeal artery enters the skull through which foramen, and an extradural hematoma at the pterion results from injury to which specific branch of this artery?
32. Cerebrospinal fluid (CSF) is primarily produced by which structure, and the volume of CSF produced per day is approximately:
33. The middle meningeal artery enters the cranial cavity through the foramen spinosum. An extradural (epidural) hematoma classically results from its injury. The foramen spinosum is a foramen in which cranial bone?
34. The cavernous sinus receives venous blood from multiple sources. Which structures pass WITHIN the lateral wall of the cavernous sinus (within the dural layers)?
35. The middle meningeal artery is at risk in temporal bone fractures. It is a branch of which artery and enters the skull through which foramen?