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Flashcards in Neuroembryology Deck (19)
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1

Formation of Neural tube

Neurulation

2

T or F:
About the 16th day, the neural plate invaginates along its central axis to form a longitudinal median neural groove, which has neuralfolds on each side

F
18th Day

3

As the neural folds fuse to form neural tube, neuroectodermal cells migrate dorsolaterally to form ______ which soon divides into two cell masses

Neural crest

4

______ gives rise to the cells that forms the PNS and ANS; cranial, spinal & autonomic ganglia

Neural Crest

5

T or F
Neurulation begins during the early part of the 4th week

T

6

T or F:
Cranial 2/3 represents future brain; cranial neuropore closes on the 15th day

F
15th day

7

T or F
Caudal 1/3 represents future spinal cord; caudal neuropore closes 2 days later

T

8

Layers of Neural Tube

Ependymal layer
Mantle layer
Marginal layer

9

T or F
Axons are at first Unipolar;

F
Bipolar

10

Unipolar neurons in the spinal ganglia (DRG) are derived from?

neural crest cells

11

This produces myelin in the PNS.

Neurolemmal cells or Schwann cells

12

T or F
Recent evidence proves that Folic acid / Folate reduces the incidence of NTD’s by as much as 70% if 200 mg is taken dailybeginning 3 months prior to conception and continuing throughout gestation

F
400 mg

13

Type of Spina Bifida which contains meninges w/ CSF.

Spina Bifida with Meningocele

14

Fusion of the neural folds in the cranial region and closure of the rostral neuropore form how many primary brain vesicles?

Three

15

Prosencephalon divides into _____ and ______

Telencephalon
Diencephalon

16

Calvaria and brain are small but the face is normal size; grossly mentally retarded because brain is underdeveloped

Microencephaly

17

Failure of the cephalic part of the neural tube to close during the 4th week of dev’t

Exencephaly

18

Associated with acrania (absence of calvaria)

Meroanencephaly

19

2 Types pf Hydrocephaly

Obstructive or noncommunicating
Nonobstructive or communicating