Development of the CNS

Question 1

Name some derivatives of neural crest cells

Answer 1

Schwann cells
Glial cells
Adrenal medulla
Melanocytes

Question 2

What are the 3 primary brain vesicles formed following closure of neural tube?

Answer 2

1. Prosencephalon (forebrain)
2. Mesencephalon (midbrain)
3. Rhombencephalon (hindbrain)

Question 3

Name regulatory structures in the brain

Answer 3

left and right thalamus
Cerebellum
Hypothalamus

Question 4

At week 5 the 3 primary brain vesicles divide further. Name these divisions

Answer 4

Prosencephalon:

1. Telencephalon
2. Diencephalon

Mesencephalon remains the same

Rhombencephalon:

1. Metencephalon- pons and cerebellum
2. Myelencephalon- Medulla

Question 5

What are the 5 regions of the spinal cord?

Answer 5

Cervical
Thoracic
Lumbar
Sacral
coccygeal

Question 6

How many vertebrae in cervical spine?

Answer 6

7

Question 7

How many vertebrae in thoracic spine?

Answer 7

12

Question 8

How many vertbrae in lumbar spine?

Answer 8

5

Question 9

How many vertebrae in sacral spine?

Answer 9

5

Question 10

what are neuroblasts?

Answer 10

Primitive nerve cells that form the mantle layer

Question 11

What does the marginal layer contain?

Answer 11

Nerve fibres emerging from neuroblasts in the mantle layer