24 Questions
What is the destination of the blood flowing from each superior sinus?
Transverse sinus
What is the destination of the blood flowing from each inferior sinus?
Internal jugular vein
What is the name of the sinus that receives blood from the superior sagittal sinus and the straight sinus?
Confluence of sinus
What is the name of the sinus that is located at the posterior cranial fossa?
Sigmoid sinus
What is the name of the artery that supplies the dura mater in the anterior cranial fossa?
Ophthalmic artery
What is the name of the nerve that supplies the supratentorial part of the dura mater?
Trigeminal nerve
What is the name of the nerve that supplies the middle cranial fossa?
Maxillary nerve
What is the name of the nerve that supplies the posterior cranial fossa?
Vagus nerve
Where does the superior sagittal sinus groove?
The vault of the skull
What is formed at the internal occipital protuberance?
The confluence of the sinuses
Where does the inferior sagittal sinus occupy?
The free lower margin of the falx cerebri
What is formed by the union of the inferior sagittal sinus with the great cerebral vein?
The straight sinus
Which sinus is usually continuous with the superior sagittal sinus?
The right transverse sinus
What do the transverse sinuses receive?
The superior petrosal sinuses, the inferior cerebral and cerebellar veins, and the diploic veins
Where do the transverse sinuses occupy?
The attached margin of the tentorium cerebelli
What do the transverse sinuses end as?
The sigmoid sinuses
What is a characteristic feature of dural venous sinuses?
They are lined by endothelium and have no muscular coat and no valves
What is the primary function of the dural venous sinuses?
To drain blood from the brain, meninges, orbit, internal ear, and diploe
Which of the following dural venous sinuses is unpaired?
Straight sinus
What is the connection between the dural venous sinuses and the diploic veins of the skull?
Through valveless emissary veins
Where do the dural venous sinuses ultimately drain into?
The internal jugular veins
What is the location of the superior sagittal sinus?
In the falx cerebri
What is the purpose of the arachnoid granulation in relation to the dural venous sinuses?
To absorb CSF
How many dural venous sinuses are paired?
6
Study Notes
Cerebral Dura Mater
- Characterized by a distinct feature: dural venous sinuses
- Dural venous sinuses:
- Lined by endothelium, no muscular coat, and valveless
- Collect blood from the brain, meninges, orbit, internal ear, and diploe
- Connected to valveless emissary veins to maintain internal and external venous pressure
- Projected into by arachnoid granulation for CSF absorption
- Blood ultimately drains into internal jugular veins in the neck
Dural Venous Sinuses
- 9 sinuses:
- Superior sagittal sinus
- Inferior sagittal sinus
- Straight sinus
- Transverse sinus
- Sigmoid sinus
- Occipital sinus
- Superior petrosal sinus
- Inferior petrosal sinus
- Cavernous sinus
Superior Sagittal Sinus
- Occupies the upper fixed border of the falx cerebri
- Begins anteriorly at the foramen cecum, occasionally receiving a vein from the nasal cavity
- Drains the cavernous sinus into the transverse sinus
Arterial Supply of the Dura Mater
- Anterior meningeal arteries: from ethmoidal arteries and internal carotid
- Middle meningeal artery: from maxillary artery
- Emissary veins: between dural venous sinuses and external veins
- Diploic veins
- Cerebral veins
Nerve Supply
- Supratentorial part: supplied by the ophthalmic division of the trigeminal nerve
- Anterior cranial fossa: supplied by anterior and posterior ethmoidal nerves and some twigs from the maxillary nerve
- Middle cranial fossa: supplied by the anteroposterior portion by a branch of the maxillary nerve and meningeal branches of the mandibular nerve
- Posterior cranial fossa: supplied by meningeal branches of the vagus and hypoglossal nerves
This quiz covers the characteristics and features of the cerebral dura mater and dural venous sinuses, including their structure and function. Topics include the endothelial lining, valveless nature, and connection to emissary veins and arachnoid granulation.
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