Meninges and CSF Pathway Flashcards
Is the brain a solid or hollow organ?
Hollow
What is at the center of the brain?
Water
What structure allows the communication between the third ventricle and lateral ventricle?
Foramen of Monroe
What does the third ventricle look like?
Kinda like a dead chicken head
What is beside the THalamus?
THe THird Ventricle
What is the only ventricle found in the cerebellum?
The Fourth Ventricle
What connects the third and fourth ventricles?
Aqueduct of Sylvius at the midbrain
CSF from the 4th Ventricle Exits? (2)
Lushke: Lateral
Magendie: Medial
Complete Pathway of CSF
Cerebrum -> Lateral Ventricle -> Foramen of Monroe -> 3rd Ventricle -> Aqueduct of Sylvius -> 4th Ventricle -> Foramen of Lushke and Magendie
What forms the roof of the lateral ventricle?
Corpus Callosum
What separates the two lateral ventricles?
Septum Pellucidum
Where is the Septum Pellucidum attached?
Fornix
What is beneath the Fornix?
Foramen of Monroe
What forms the lateral wall of the lateral ventricles?
Caudate Nucleus
Is there CSF going through the Pons?
Is there CSF going through the Medulla?
Is there CSF going through the Spine?
No
No
Duh
What makes CSF?
Choroid Plexus
Where does the formed CSF go?
Subarachnoid Space
Subarachnoid Space is between?
Arachnoid Mater and Pia Mater
Where is the Circle of Willis found?
Subarachnoid Space
What is the biggest cistern of the subarachnoid?
Cisterna Magna
Also the only “important” one, the others are nice to know
How much CSF is made in a day?
What is the total volume of CSF?
500mL/d
Total Volume: 100-160 mL
Function of CSF
Cushions and nourishes brain
Excessive CSF in the brain is called?
Hydrocephaly
Name 3 Brain Protectors
- Meninges
- CSF
- Blood Brain Barrier
What separates the cerebrum from the cerebellum?
Tentorium
[Falx Cerebri]
Shape?
Attached to?
Sickle-shaped
Attached to the crista galli anteriorly and tentorium posteriorly
Where is the Falx Cerebelli?
Small dural reflection in between the cerebellar hemispheres
Location of the Diaphragma Sellae
Separates the sella turcica from everything else
[Venous Drainage]
Pathway
Superior Sagittal Sinus -> Transverse Sinus -> Sigmoid Sinus -> Jugular Vein
