Sem 1 Meninges, blood supply, cerebrospinal fluid Flashcards
Dura mater Forms duplications lined by endothelial cells
-> These duplications are called ___
dural sinuses.
Dura matter Is firmly attached onto ____
the internal surface of the neurocranium
Cerebellum is found in (1)____ (which fossa?) and is isolated from the brain by (2) ____
- the posterior cranial fossa
2. the horizontal tentorium cerebelli (cerebellar tentorium)
Identify
Falx cerebri
Identify
- Falx cerebri
2. Tentorium cerebelli
Dural venous sinuses are tipically enclosed by ___ and __ of dura matter
the periosteal and meningeal layers of the dura mater
____ is the longest sinus extending from the frontal crest to the internal occipital protuberance
Superior sagittal sinus
Which artery can you find in the cavernous sinuses?
the internal carotid arter
Cavernous sinuses are seen on the two sides of which fossa?
the hypophysial fossa
Identify
What is Danger triangle of the face?
an astomosis between the superior and/or inferior ophthalmic veins and the angular vein (terminal portion of facial vein).
Why is it called Danger triangle of the face?
Bacterial infections of the skin within this area may spread toward the orbit and the cavernous sinus and although it is rare, but cavernous sinus thrombosis, meningitis or brain abscess can develop as the most serious complications.
The biggest dural surface is supplied by _____ entering through foramen spinosum and spreading within the arterious sulci.
the middle meningeal artery (MMA, from maxillary artery arising from the external carotid artery)
ant. meningeal a. is an indirect branch of __ arising from
the ophthalmic a. arising from internal carotid a.
the post. meningeal a. is a terminal branch of ___ coming from ___
the ascending pharyngeal coming from external carotid
What s Epidural space?
is a virtual space between the bone of skull and the dura mater
Innervation of the dura
-> Identify
What are the nerves that innervate dura matter in middle cranial fossa?
maxillary and mandibular divisions of trigeminal nerve dominate
What are the nerves that innervate dura matter in posterior cranial fossa?
the vagus nerve and some cervical branches
What is a Subdural space?
A virtual space that is found between the dura and the continuous layer of arachnoid
What is Subarachnoid space?
a real space filled by cerebrospinal fluid and containing cerebral blood vessels.
What are subarachnoid cisterns?
compartments within the subarachnoid space where the pia mater and arachnoid membrane are not in close approximation: cisterns are distinct dilations of the subarachnoid space.
Identify
Circle of Willis encloses ___ (3 structures)
the optic chiasm, pituitary stalk and mamillary bodies
Oculomotor nerve exits between __ and ___
the posterior cerebral and superior cerebellar arteries.
Name of this sulcus (green part)
parietooccipital sulcus
Identify
Almost the total volume of veinous blood collected from the brain leaves the skull through __ and ___
the jugular foramen and the internal jugular vein.
If the jugular foramen and/or the internal jugular vein is getting occluded, blood may escape through ___ and ___ connecting the dural sinuses with the veins of the scalp skin.
the diploic and emissary veins
Identify
The role of Emissary veins
Rather form a network within the spongy substance of the bones to connect dural sinuses and the external veins
(do not pass through the skull directly)
Identify
Identify arteries (red lines)
What is the Site of CSF resorption?
arachnoid granulations in the superior sagittal sinus and lateral lacunae.
