Lecturio 2 The Neural Tube and Ventricular System (Nervous System Development)

Question 1

Which stage of CNS development is it?

Answer 1

The Three Vesicle-stages

Question 2

The Three Vesicle-stages

→ The neural tube and the neural canal within it develop distinctive regions as they enlarge.

→ Three distinct primary brain vesicles which are ____ develop first

Answer 2

1. Prosencephalon (forebrain)
2. Mesencephalon (midbrain)
3. Rhombencephaon (hindbrain)

Question 3

The Three Vesicle-stages

→ The neural tube and the neural canal within it develop distinctive regions as they enlarge

Three distinct primary brain vesicles develop first:

→ IDENTIFY 3 VESICLES

Answer 3

The Three Vesicle-stages

Question 4

After The Three Vesicle-stages, what is the next stage?

Answer 4

The Five Vesicle-stages

Question 5

What happen during The Five Vesicle-stages?

Answer 5

3 primary vesicles give rise to 5 secondary brain vesicles

Question 6

The Five Vesicle-stages

→ Prosencephalon gives rise to __(2)

Answer 6

• Telencephalon
• Diencephalon.

Question 7

The Five Vesicle-stages

→ Identify

Answer 7

Question 8

The Five Vesicle-stages

→ What does the mesencephalon give rise to?

Answer 8

Mesencephalon stays as mesencephalon.

Question 9

The Five Vesicle-stages

→ What does the rhombocephalon give rise to?

Answer 9

1. Metencephalon
2. Myelencephalon

Question 10

Differentiation of the Vesicles

Secondary brain vesicles develop into ___ and ___

Answer 10

the mature brain and brainstem.

Question 11

Differentiation of the Vesicles

Secondary brain vesicles develop into the mature brain and brainstem.

→ Telencephalon becomes ___ & ___

Answer 11

the left and right cerebral cortex.

Question 12

Differentiation of the Vesicles

Secondary brain vesicles develop into the mature brain and brainstem.

→ Diencephalon becomes ___ (3)

Answer 12

thalamus, hypothalamus, and pineal gland.

Question 13

Differentiation of the Vesicles

Secondary brain vesicles develop into the mature brain and brainstem.

→ Mesencephalon becomes ___

Answer 13

Mesencephalon becomes (stays) the midbrain.

Question 14

Differentiation of the Vesicles

Secondary brain vesicles develop into the mature brain and brainstem.

→ Metencephalon becomes ___(2)

Answer 14

the pons and cerebellum.

Question 15

Differentiation of the Vesicles

Secondary brain vesicles develop into the mature brain and brainstem.

→ Myelencephalon becomes ___

Answer 15

the medulla oblongata.

Question 16

Differentiation of the Vesicles

Secondary brain vesicles develop into the mature brain and brainstem.

→ The rest of the neural tube develops into ___

Answer 16

the spinal cord.

Question 17

Differentiation of the Vesicles

Identify

Answer 17

Question 18

Mature Appearance of the Ventricles

The neural canal enlarges along with the neural tube.

→ which cells line these cavities?

Answer 18

Ependymal cells

Question 19

Mature Appearance of the Ventricles

The neural canal enlarges along with the neural tube.

→ Ependymal cells, derived from ___, line these cavities.

Answer 19

the innermost layer of neuroepithelial cells

Question 20

Mature Appearance of the Ventricles

The neural canal enlarges along with the neural tube.

→ The left and right cerebral cortex surround ___ and ___

Answer 20

the left and right lateral ventricles.

Question 21

Mature Appearance of the Ventricles

The neural canal enlarges along with the neural tube.

→ The thalamus, hypothalamus, and pineal gland surround ____

Answer 21

the third ventricle.

Question 22

Mature Appearance of the Ventricles

The neural canal enlarges along with the neural tube.

→ The midbrain surrounds ____

Answer 22

the cerebral aqueduct.

Question 23

Mature Appearance of the Ventricles

The neural canal enlarges along with the neural tube.

→ The pons, cerebellum, and medulla oblongata all surround ___

Answer 23

the fourth ventricle.

Question 24

Mature Appearance of the Ventricles

The neural canal enlarges along with the neural tube.

→ The spinal cord surrounds ____

Answer 24

a central canal.

Question 25

**The Neural Tube and Neural Crest** → The ependymal lining of the lateral, third, and fourth ventricles develops \_\_\_\_

Answer 25

a vascular outgrowth called the **choroid plexus**.

Question 26

**The Neural Tube and Neural Crest** → The role of the **choroid plexus**.

Answer 26

filters blood to produce **cerebrospinal fluid** (CSF) that fills and travels through the ventricular system.

Question 27

**The Neural Tube and Neural Crest** → the **choroid plexus** leaves the fourth ventricle to surround \_\_\_\_

Answer 27

the central nervous system

Question 28

**The Neural Tube and Neural Crest** → the **choroid plexus** leaves ____ to surround the central nervous system

Answer 28

the fourth ventricle

Question 29

**The Neural Tube and Neural Crest** → the **choroid plexus** leaves the fourth ventricle to surround the central nervous system → enters the venous system and becomes \_\_\_

Answer 29

blood plasma

Question 30

**The Neural Tube and Neural Crest** As the neural tube grows it develops \_\_\_

Answer 30

a series of bends in the sagittal plane.

Question 31

**The Neural Tube and Neural Crest** At the three brain vesicle stage, the **cervical flexure** occurs between ___ and \_\_\_\_

Answer 31

the spinal cord and rhombencephalon.

Question 32

**The Neural Tube and Neural Crest** At the three brain vesicle stage, the **cephalic flexure** occurs between ___ and \_\_\_\_

Answer 32

the prosencephalon and mesencephalon.

Question 33

**The Neural Tube and Neural Crest** At the three brain vesicle stage 1. **\_\_\_\_\_\_** occurs between the spinal cord and rhombencephalon. 2. **\_\_\_\_\_\_** occurs between the prosencephalon and mesencephalon.

Answer 33

1. The **cervical flexure** 2. The **cephalic flexure**

Question 34

**The Neural Tube and Neural Crest** As the neural tube grows it develops \_\_\_

Answer 34

a series of bends in the sagittal plane.

Question 35

**The Neural Tube and Neural Crest** **→** Identify

Answer 35

Question 36

**The Neural Tube and Neural Crest** At the five brain vesicle stage, ___ develops between the myelencephalon and metencephalon

Answer 36

a **pontine flexure**

Question 37

**The Neural Tube and Neural Crest** At the five brain vesicle stage, a **pontine flexure** develops between ___ and \_\_\_

Answer 37

the myelencephalon and metencephalon.

Question 38

**The Neural Tube and Neural Crest** **→** Identify

Answer 38