W19/L6: Embryology of NS Flashcards Preview

6. Neuro > W19/L6: Embryology of NS > Flashcards

Flashcards in W19/L6: Embryology of NS Deck (11):
1

What are the 3 layers of the trilaminar embryo?

Ectoderm
Mesoderm
Endoderm

2

What is the process of neuralation?

The epithelial cells take on a special character, forming the neural plate.

The neural plate begins to invaginate to form a groove.

The "lips" of the groove fold in on themselves to make a tube lying below the remaining ectoderm

3

What structure lies beneath the neural tube as it is developing?

The notochord

4

In what order does the neural fold "zip up?"

5

What does a failure in step 2 of neural fold closure cause?

Anecephaly

6

What does a failure in step 5 of neural fold closure cause?

Spina bifida

7

What nutrient is essential for neural fold closure?

Folate

8

What are the three initial vesicles of the neural tube called?

Prosencephalon (forebrain)
Mesencephalon (midbrain)
Rhombencephalon (hindbrain)

9

The prosencephalon splits into 2 segments, what are they called?

Telencephalon
Diencephalon

10

How many segments does the rhombencephalon then split into

7 (**check this, as it also splits into metencephalon and myeloencephalon)

11

The retinae form from

Outpouchings of the diencephalon called optic vesicle)