CNS Embryology Flashcards
The CNS is derived from what?
Rostral (cranial) end of neural tube (day 21)
CNS development is guided by underlying notochord which is derived from?
Mesoderm
CNS development begins with what?
3 primary dilations called vesicles
The 1st vesicle is known as the what?
Prosencephalon (forebrain)
The prosencephalon further develops into secondary vesicles which develop what?
Telencephalon
Diencephalon
The telencephalon develops into what?
Cerebral hemispheres
Lateral ventricles
The diencephalon gives rise to what?
Thalamus
Epithalamus
Subthalamic Nuclei
The 2nd vesicle is what?
Mesencephalon which becomes mid brain
The 3rd vesicle is what?
Rhombencephalon
The rhombencephalon further develops into what?
Metencephalon
Myelencephalon
The metencephalon develops into what?
Pons
Cerebellum
The myelencephalon becomes what?
Medulla Oblongata
The brain is 25% of adult size at birth and 75% by when?
End of 1st year
Subsequent growth is due to what?
Increase in cell size and axonal collaterals and NOT number of cells
