During the first 26 days of development, what occurs?
- 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)
What are the three primary brain vesicles or regions?
The forebrain, the midbrain, and the hindbrain
How do the three regions of the brain form?
The anterior end of the neural tube expands and constricts to form the forebrain, midbrain and hindbrain
How does the Central Cavity of the brain form?
The central cavity of the neural tube remains continuous and expands into ventricles containing cerebrospinal fluid (CSF)
What are the Secondary Brain Vesicles of the Forebrain?
- Telencephalon (contains the paired lateral ventricles)
- Diencephalon (contains the third ventricle)
What makes up the Telencephalon vesicles (contains the paired lateral ventricles)
Cerebral hemispheres (cortex & white matter) and basal nuclei
What makes up the Diencephalon (contains the third ventricle)
Thalamus, Hypothalamus, Epithalamus, Retina
What are the Secondary Brain Vesicles of the Midbrain and Hindbrain together?
- Brain Stem (contains the cerebral aqueduct & the fourth ventricle)
- Cerebellum
What makes up the Brain Stem? (containing the cerebral aqueduct & the fourth ventricle)?
Midbrain, Pons, Medulla Oblongata
How does the Spinal Cord develop?
Develops from the caudal end of the neural tube
