final chp 14 nervous system Flashcards Preview

Embryology > final chp 14 nervous system > Flashcards

Flashcards in final chp 14 nervous system Deck (13)
Loading flashcards...
1

the mantle layers increase in?

mass

2

mantle layers are composed of?

gray matter

3

the mantle layer sides form masses called?

dorsal columns
lateral columns
ventral columns

4

the marginal layer?

-framework of neuroepithelial and glia cells
-nerve fibers and myelin around the fibers
-thickening of area is due to the nerve fibers

5

during what month of development does the spinal cord extend the entire length of the embryo?

the third month of development

6

during the sixth month of development where does the spinal cord end?

1st sacral vertebra

7

at birth where does the spinal cord end?

levels of 2nd and 3rd lumbar vertebra

8

at adult where does the spinal cord end?

L1

9

what are the primary brain vesicles?

forebrain/prosoencephalon
midbrain/mesencephalon
hindbrain/ rhombencephalon

10

what are the secondary brain vesicles?

telencephalon
diencephalon
metencephalon
-pons
-cerebellum
-myelencephalon or medulla

11

describe the cephalic flexure?

located in midbrain
-external bending
-flexure causes the end of the head to bend ventrally

12

describe the cervical flexure?

located at junction of the myelencephalon and spinal cord
-external bending

13

describe the pontine flexure?

metencephalon and myelencephalon
-internal bending