Lecturio 2 The Neural Tube and Ventricular System (Nervous System Development) Flashcards
Which stage of CNS development is it?
The Three Vesicle-stages
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
- Prosencephalon (forebrain)
- Mesencephalon (midbrain)
- Rhombencephaon (hindbrain)
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
The Three Vesicle-stages
After The Three Vesicle-stages, what is the next stage?
The Five Vesicle-stages
What happen during The Five Vesicle-stages?
3 primary vesicles give rise to 5 secondary brain vesicles
The Five Vesicle-stages
→ Prosencephalon gives rise to __(2)
- Telencephalon
- Diencephalon.
The Five Vesicle-stages
→ Identify
The Five Vesicle-stages
→ What does the mesencephalon give rise to?
Mesencephalon stays as mesencephalon.
The Five Vesicle-stages
→ What does the rhombocephalon give rise to?
- Metencephalon
- Myelencephalon
Differentiation of the Vesicles
Secondary brain vesicles develop into ___ and ___
the mature brain and brainstem.
Differentiation of the Vesicles
Secondary brain vesicles develop into the mature brain and brainstem.
→ Telencephalon becomes ___ & ___
the left and right cerebral cortex.
Differentiation of the Vesicles
Secondary brain vesicles develop into the mature brain and brainstem.
→ Diencephalon becomes ___ (3)
thalamus, hypothalamus, and pineal gland.
Differentiation of the Vesicles
Secondary brain vesicles develop into the mature brain and brainstem.
→ Mesencephalon becomes ___
Mesencephalon becomes (stays) the midbrain.
Differentiation of the Vesicles
Secondary brain vesicles develop into the mature brain and brainstem.
→ Metencephalon becomes ___(2)
the pons and cerebellum.
Differentiation of the Vesicles
Secondary brain vesicles develop into the mature brain and brainstem.
→ Myelencephalon becomes ___
the medulla oblongata.
Differentiation of the Vesicles
Secondary brain vesicles develop into the mature brain and brainstem.
→ The rest of the neural tube develops into ___
the spinal cord.
Differentiation of the Vesicles
Identify
Mature Appearance of the Ventricles
The neural canal enlarges along with the neural tube.
→ which cells line these cavities?
Ependymal cells
Mature Appearance of the Ventricles
The neural canal enlarges along with the neural tube.
→ Ependymal cells, derived from ___, line these cavities.
the innermost layer of neuroepithelial cells
Mature Appearance of the Ventricles
The neural canal enlarges along with the neural tube.
→ The left and right cerebral cortex surround ___ and ___
the left and right lateral ventricles.
Mature Appearance of the Ventricles
The neural canal enlarges along with the neural tube.
→ The thalamus, hypothalamus, and pineal gland surround ____
the third ventricle.
Mature Appearance of the Ventricles
The neural canal enlarges along with the neural tube.
→ The midbrain surrounds ____
the cerebral aqueduct.
Mature Appearance of the Ventricles
The neural canal enlarges along with the neural tube.
→ The pons, cerebellum, and medulla oblongata all surround ___
the fourth ventricle.
Mature Appearance of the Ventricles
The neural canal enlarges along with the neural tube.
→ The spinal cord surrounds ____
a central canal.
The Neural Tube and Neural Crest
→ The ependymal lining of the lateral, third, and fourth ventricles develops ____
a vascular outgrowth called the choroid plexus.
The Neural Tube and Neural Crest
→ The role of the choroid plexus.
filters blood to produce cerebrospinal fluid (CSF) that fills and travels through the ventricular system.
The Neural Tube and Neural Crest
→ the choroid plexus leaves the fourth ventricle to surround ____
the central nervous system
The Neural Tube and Neural Crest
→ the choroid plexus leaves ____ to surround the central nervous system
the fourth ventricle
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 ___
blood plasma
The Neural Tube and Neural Crest
As the neural tube grows it develops ___
a series of bends in the sagittal plane.
The Neural Tube and Neural Crest
At the three brain vesicle stage, the cervical flexure occurs between ___ and ____
the spinal cord and rhombencephalon.
The Neural Tube and Neural Crest
At the three brain vesicle stage, the cephalic flexure occurs between ___ and ____
the prosencephalon and mesencephalon.
The Neural Tube and Neural Crest
At the three brain vesicle stage
- ______ occurs between the spinal cord and rhombencephalon.
- ______ occurs between the prosencephalon and mesencephalon.
- The cervical flexure
- The cephalic flexure
The Neural Tube and Neural Crest
As the neural tube grows it develops ___
a series of bends in the sagittal plane.
The Neural Tube and Neural Crest
→ Identify
The Neural Tube and Neural Crest
At the five brain vesicle stage, ___ develops between the myelencephalon and metencephalon
a pontine flexure
The Neural Tube and Neural Crest
At the five brain vesicle stage, a pontine flexure develops between ___ and ___
the myelencephalon and metencephalon.
The Neural Tube and Neural Crest
→ Identify
