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Flashcards in Development Of NS Deck (18)
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0
Q

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

A

Ectoderm

1
Q

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

A

Neural tube

2
Q

From what do PNS neurones originate?

A

Neural crest

3
Q

What embryonic cells form somites?

What do somites develop into?

A

Mesoderm

Vertebrae of SC and skeletal muscles

4
Q

What forms in initial differentiation?

A

Primary vesicles:

  • PROSENCEPHALON (forebrain)
  • Mesencephalon (midbrain)
  • RHOMBENCEPHALON (hindbrain)
5
Q

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

A

Optic vesicles —> optic nerve

Telencephalon —> cerebral hemispheres

6
Q

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

A

TECTUM

Superior and inferior colliculus

7
Q

The floor of the midbrain becomes?

A

TEGMENTUM

Substantia nigra and red nucleus

8
Q

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

A

Metencephalon

9
Q

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

A

Medulla

10
Q

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

A

Intermediate zone

11
Q

Thalamus and hypothalamus are derived from?

A

Diencephalon

12
Q

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

A

Dorsal

13
Q

Groups of cell bodies in the CNS form a?

A

Nucleus

14
Q

Groups of axons in PNS?

A

Nerve

15
Q

Group of cell bodies in PNS?

A

Ganglion

16
Q

Group of axons in CNS?

A

Tract

17
Q

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

A

Control chemical composition of extracellular fluid

Regulate NT- Remove NT from cleft