Nuerobio 3 Flashcards
Exam 2 (25 cards)
What are the three meninx layers? (meninges)
Dura mater
Arachnoid
Pia mater
What are the traits of the dura mater?
tough and fibrous
the most outer layer
encompasses venous sinuses
What is the function of the dura mater?
Protection
The infoldings of the dura mater separate which parts of the brain?
The faux cerebri between cerebral hemispheres
tentorium cerebelli between cerebrum and cerebellum
What are the traits of the arachnoid mater?
Spider web appearance
Forms granulations that absorb CSF
Location of small arteries
What is the function of the arachnoid mater?
Cushioning also the absorption of CSF
What are the traits of pia mater?
It’s delicate membrane
Follows the gyri and sulci of the brain
What is the function of the pia mater?
Barrier and blood vessel penetration
Which membrane(s) are considered pachymeninges?
The dura mater
What membrane(s) are considered leptomeninges?
The arachnoid mater and the pia mater
What is the epidural space?
The space between bone and dura
What is the subdural space?
Potential space
What is the subarachnoid space?
Location of the CSF
What does the dorsal spinal artery supply?
Dorsal white and grey mater
What does the ventral spinal artery supply?
Supplies ventral and lateral white and grey matter
What are the 2 major veins of the spinal cord?
Dorsal spinal vein
Ventral spinal vein
What is the function of the blood brain barrier?
Protect the neural tissue from pathogens and toxins in the bloodstream
What are the components of the blood brain barrier?
Endothelial cells with tight junctions
Basement membrane
Pericytes-contractile cells
Astrocyte foot processes
How was the blood brain barrier discovered?
Discovered early 1900s
IV injections of dye stained all tissues except the brain
No dye in CSF
Choroid plexus and meninges were stained
Where is the lateral ventricles located?
The telencephalon
Where is the third ventricle located?
The diencephalon
Where is the mesencephalic aqueduct located?
Mes-encephalon
Where is the fourth ventricle located?
The rhomb-encephalon
What are the traits of cerebrospinal fluid?
Clear, colorless fluid
Fills the ventricular system and subarachnoid space
Produced by choroid plexus from blood
