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Flashcards in Development Of NS Deck (18):
0

From what do the brain and SC (CNS) originate?

Neural tube

1

What type of embryonic cells does the NS (and skin) derive?

Ectoderm

2

From what do PNS neurones originate?

Neural crest

3

What embryonic cells form somites?

What do somites develop into?

Mesoderm

Vertebrae of SC and skeletal muscles

4

What forms in initial differentiation?

Primary vesicles:

- PROSENCEPHALON (forebrain)
- Mesencephalon (midbrain)
- RHOMBENCEPHALON (hindbrain)

5

Further differentiation forms secondary vesicles. What are the secondary vesicles of the forebrain (prosencephalon)?

Optic vesicles ---> optic nerve

Telencephalon ---> cerebral hemispheres

6

The roof (dorsal surface) of the mesencephalic vesicle becomes?

TECTUM
(Superior and inferior colliculus )

7

The floor of the midbrain becomes?

TEGMENTUM

(Substantia nigra and red nucleus)

8

What secondary vesicle is the rostral half of the hindbrain that develops into the pons and cerebellum?

Metencephalon

9

Myelencephalon is the caudal half of the hindbrain and develops into?

Medulla

10

What part of the SC is the grey matter between the dorsal and ventral horns involved in autonomic control?

Intermediate zone

11

Thalamus and hypothalamus are derived from?

Diencephalon

12

Surface of brainstem attached to cerebellum is the ventral or dorsal surface?

Dorsal

13

Groups of cell bodies in the CNS form a?

Nucleus

14

Groups of axons in PNS?

Nerve

15

Group of cell bodies in PNS?

Ganglion

16

Group of axons in CNS?

Tract

17

Astrocytes are the most common glial cell, what's their main function?

Control chemical composition of extracellular fluid
Regulate NT- Remove NT from cleft