Day 3

Question 1

What structures form during week 3 of development?

Answer 1

Neural plate
- neural groove
- neural fold

Question 2

What tissue layer is the nervous system derived from?

Answer 2

Ectoderm

Question 3

How do the cells form a neural groove?

Answer 3

cells invaginate (migrate inward) and form a groove

Question 4

Neural plate

Answer 4

Group of cells that are going to migrate inwards to form groove

Question 5

What happens during week 4 of development?

Answer 5

Neural crest and neural tube form
- separated from ectoderm

Question 6

What are the 3 primary brain vesicles?

Answer 6

• prosencephalon
• mesencephalon
• rhombencephalon

Question 7

Prosencephalon

Answer 7

Forebrain

Question 8

Mesencephalon

Answer 8

Midbrain

Question 9

Rhombencephalon

Answer 9

Hindbrain

Question 10

What are the 2 flexures that arise in week 4?

Answer 10

Cervical and cephalon flexure

Question 11

Where is the cervical flexure located?

Answer 11

End of hindbrain, between spinal cord and rhombencephalon, left of picture on slide

Question 12

Where is the cephalon flexure located?

Answer 12

In between the rhombencephalon and mesencephalon, right on picture on slides

Question 13

What forms from the mesencephalon during week 5?

Answer 13

• corpora quadrigemina
• cerebral peduncies
• cerebral aqueduct

Question 14

What secondary brain vesicles are formed from the prosencephalon?

Answer 14

Diencephalon and telencephalon

Question 15

What secondary brain vesicle is formed from the mesencephalon?

Answer 15

Mesencephalon

Question 16

What secondary brain vesicles are formed from the rhombencephalon?

Answer 16

Mesencephalon and myelencephalon

Question 17

Which primary brain vesicle is considered cranial and which is considered caudal?

Answer 17

• cranial = procencephalon
• caudal = rhombencephalon