Embryonic Development

Question 1

During the first 26 days of development, what occurs?

Answer 1

• Ectoderm thickens, forming neural plate
• The neural plate invagintes, forming the neural groove
• the neural groove fuses dorsally and forms the Neural tube (head to tail)

Question 2

What are the three primary brain vesicles or regions?

Answer 2

The forebrain, the midbrain, and the hindbrain

Question 3

How do the three regions of the brain form?

Answer 3

The anterior end of the neural tube expands and constricts to form the forebrain, midbrain and hindbrain

Question 4

How does the Central Cavity of the brain form?

Answer 4

The central cavity of the neural tube remains continuous and expands into ventricles containing cerebrospinal fluid (CSF)

Question 5

What are the Secondary Brain Vesicles of the Forebrain?

Answer 5

• Telencephalon (contains the paired lateral ventricles)

- Diencephalon (contains the third ventricle)

Question 6

What makes up the Telencephalon vesicles (contains the paired lateral ventricles)

Answer 6

Cerebral hemispheres (cortex & white matter) and basal nuclei

Question 7

What makes up the Diencephalon (contains the third ventricle)

Answer 7

Thalamus, Hypothalamus, Epithalamus, Retina

Question 8

What are the Secondary Brain Vesicles of the Midbrain and Hindbrain together?

Answer 8

• Brain Stem (contains the cerebral aqueduct & the fourth ventricle)
• Cerebellum

Question 9

What makes up the Brain Stem? (containing the cerebral aqueduct & the fourth ventricle)?

Answer 9

Midbrain, Pons, Medulla Oblongata

Question 10

How does the Spinal Cord develop?

Answer 10

Develops from the caudal end of the neural tube