L15 Development

Question 1

central nervous system (CNS)
Orgin?

Answer 1

Neuroectoderm

Question 2

Upper part of neural tube gives?

Answer 2

Brain

Question 3

Lower part of neural tube gives?

Answer 3

Spinal cord

Question 4

Cavities of neural tube gives?

Answer 4

Ventricles

Question 5

NEURAL CREST DERIVATIVES:

Answer 5

• Spinal (dorsal root) ganglia
• Sympathetic chain and pre aortic ganglia
• Parasympathetic ganglia of the gastrointestinal tract
• Adrenal medulla
• Schwann cells
• Glial cells
• Meninges (forebrain)

Question 6

Wall of neural tube consist of? من الداخل للخارج

Answer 6

Neuroepithelial layer
Mantle layer ( nerve cell - neuroblast )
Marginal layer ( nerve fiber )

Question 7

ventral thickenings, The Basal plates, form ?

Answer 7

the motor areas in the neural tube

Question 8

The dorsal thickenings, The Alar plates, form?

Answer 8

the sensory areas.

Question 9

neuroepithelial cells give rise to?

Answer 9

Bipolar neuroblast
Gliablast cells

Question 10

Gliablast cells gives rise to?

Answer 10

Oligodendroglia
Fibrillar astrocyte
Protoplasmic astrocyte

Question 11

Oligodendroglia Arises from?

Answer 11

Gliablast cell

Question 12

Microglia cells arise from?

Answer 12

mesenchyme cells

Question 13

At 3rd month of intrauterine life the spinal cord?

Answer 13

fills the vertebral canal

Question 14

• At the 5th month of intrauterine life the lower level of the cord at?

Answer 14

the level of L5 or S1 vertebra

Question 15

• At birth the lower level of spinal cord at the level ?

Answer 15

3rd lumber vertebra

Question 16

• in adult lower level of spinal cord at level of?

Answer 16

Lower part of L1

Question 17

-Most defects of the spinal cord result from?

Answer 17

abnormal closure of the neural folds in the third and fourth weeks of development.

Question 18

Dorsal root ganglion arises from ?

Answer 18

Neural CREST cells

Question 19

Peripheral presses of dorsal root form?

Answer 19

Spinal nerve

Question 20

In the spinal cord, the myelin sheath is formed by?

Answer 20

oligodendroglia cells ( CNS )

Question 21

outside the spinal cord, the sheath is formed by?

Answer 21

Schwann cells ( PNS )

Question 22

Upper part of neural tube has 3 thickening:

Answer 22

(1) Prosencephalon, or Forebrain
(2) Mesencephalon, or Midbrain
(3) Rhombencephalon or Hindbrain.

Question 23

Caudate or lentiform nucleus arises from?

Answer 23

Telencephalon

Question 24

Cavity of forebrain is?

Answer 24

Lateral ventricle
3rd ventricle

Question 25

Cavity of diencephalon is?

Answer 25

3rd ventricle

Question 26

Cavity of telencephalon ?

Answer 26

Lateral ventricle

Question 27

Cavity of mesencephalon ( midbrain )?

Answer 27

Cerebral aqueduct

Question 28

Rhombencephalon or Hindbrain gives?

Answer 28

Metencephalon Myelencephalon

Question 29

Metencephalon gives?

Answer 29

Pons Cerebellum

Question 30

Myelencephalon gives?

Answer 30

Medulla

Question 31

Cavity of Rhombencephalon or Hindbrain ?

Answer 31

4th ventricle

Question 32

Lower part of neuronal tube cavity?

Answer 32

Central canal

Question 33

All motor functional component arise from?

Answer 33

Basal plate ( all motor nuclei ) eاللي هم GSE ,SVE ,GVE كل efferent وال motor neucli حقت الاعصاب

Question 34

All sensory functional component arise from?

Answer 34

Alar plate Aاللي هم SSA, GSA, SVA, GVA كل afferent وال sensory neucli حقت الاعصاب

Question 35

LGB arise from ?

Answer 35

Diencephalon