Final Flashcards
What embryonic layer is the neural plate a thickening of?
Ectoderm
What is formed after the neural plate and then after that intermediate?
Neural plate - neural groove - neural tube
What are the primary vesicles in the 3 week embryo?
Prosencephalon
Mesencephalon
Rhombencephalon
What are the secondary brain vesicles that form from the primary vesicles?
Telencephalon
Diencephalon
Mesencephalon
Metencehpalon
Myelencephalon
What are the 4 major brain regions?
Cerebrum
Diencephalon
Brain stem
Cerebellum
What 2 structures are included in the diencephalon?
Thalamus
Hypothalamus
What 3 structures make up the brain stem?
Mesencephalon
Pons
Medulla oblongata
Gray matter forms ___ whereas white matter forms ___
Nuclei; tracts
What structures protect the brain? 4
Cranium
Meninges
CSF
BBB
What is the function of the cranial meninges?
Protect the brain
Framework for blood vessels
Circulate CSF
Is the epidural space of the skull a real space?
No, it is a potential space existing under pathological conditions
Is the subdural space a real space?
No, potential space only existing under pathological conditions
What does the subarachnoid space contain? 3
Actual space containing CSF, arteries, and veins
What are the 4 cranial dural septa?
Falx cerebri
Tentorium cerebelli
Falx cerebelli
Diaphragma selae
Where is the falx cerebri found and what does it separate?
In the longitudinal fissure; separates the R and L hemispheres
What 2 major veins are found within the falx cerebri?
Superior sagittal sinus
Inferior sagittal sinus
What shape does the tentorium cerebelli resemble and what structures does it separate?
Resembles a tent; separates the cerebrum from the cerebellum
What major blood vessels are found within the tentorium cerebelli?
Transverse sinuses
What does the diphragma selae separate?
Separates the pituitary and the hypothalamus
What is the purpose of the brain ventricles?
Buoyancy
Protection
Environmental stability
Where are the 2 lateral ventricles found?
One in each hemisphere
Where is the 3rd ventricle found?
In the diencephalon
Where is the 4th ventricle found?
Between the pons and the cerebellum
How does the 3rd ventricle communicate with the lateral ventricles and the 4th ventricle?
Lateral ventricles: interventricular foramen
4th ventricle: cerebral aqueduct