CNS Embryology Flashcards Preview

Neuro Block 1-RG > CNS Embryology > Flashcards

Flashcards in CNS Embryology Deck (38):
1

This structure induces the formation of the neural plate

notochord

2

The neural tube forms from this original embryonic layer

ectoderm

3

Cells derived from ectoderm that form the neural tube

neuroectoderm

4

Cells straddling neuroectoderm cells

neural crest cells

5

Neural crest cells eventually become what type of neuronal cell

dorsal root ganglia cells (1˚ sensory neurons)

6

This is the process of neural tube formation

neurulation

7

The neural tube becomes what two structures

brain and cord

8

The neural crest becomes what neuronal structure

1˚ sensory neurons

9

The neural canal becomes what neuronal structure

ventricles of brain and cenral spinal canal

10

Three layers of developing spinal cord

-ventricular layer
-intermediate layer
-marginal layer

11

Function of spinal ventricular layer

-become glial and neuronal cell types
-lined with ependymal cells

12

Function of spinal intermediate layer

gray matter of cord

13

Function of marginal spinal layer

white matter

14

Name of two spinal plates

basal
alar

15

The basal plate becomes what

anterior and lateral gray horn

16

The alar plate becomes what

posterior gray horn

17

Myelination continues until approximately what age

2 y/o

18

+ Babinski is what

fanning of toes, not curling
may occur in infants up to 2 y/o

19

What is the length of the spinal cord at birth

L2 or L3

20

What is length of spinal cord in adulthood

L1

21

The proencephalon becomes what two intermediate structures

telencephalon
diencephalon

22

The telencephalon becomes what structures

cortex
olfactory bulbs

23

The diencephalon becomes what structures

thalamus
hypothalamus
epithalamus
subthalamus

24

The mesencephalon becomes what structure

midbrain

25

The rhobencephalon becomes what structures

metencephalon
myencephalon

26

The metencephalon becomes what structures

pons
cerebellum

27

The myencephalon becomes what structures

medulla

28

The lateral ventricles are formed from the cavity of which structure

telencephalon

29

The third ventricle is formed from the cavity of which structure

diencephalon

30

The aqueduct is formed from the cavity of which structurre

mesencephalon

31

The fourth ventricle is formed from the cavity of which structure

rhombencephalon

32

Syringomyelia

tubular defect in cervical cord, may lead to loss of pain and temperature sensation over shoulder and upper arm

33

Holoprosencephaly

failure of proencephalon to divide into two hemispheres

34

Hydrocephalus

dialation of ventricles due to overproduction of CSF or poor CSF drainage

35

Arnold-Chiar malformation

cerebellum protrudes through foramen magnum
clinical manifestations and age of onset may vary considerably

36

Congenital megacolon

failure of neural crest cells to migrate to colon--parasympathetic ganglia do nor form and parastalsis is halted

37

Neurolation begins when

end of week 3, about day 19

38

Skull begins forming when

end of week 4