Dr. Ken Tangen gives a quick overview of how the primitive streak becomes a neural tube and then becomes a brain.

1. Today’s Topic
Brain
Development

3. Primitive Streak
Outer layer of embryo thickens
Ectoderm forms a plate

4. Edges roll up

5. Zips up!
Forms a Neural Tube

6. Cells inside become:
glial cells & neurons

7. Tube with bulges

9. 1. Forebrain
Cerebral cortex
Basal ganglia
Limbic system
Thalamus
Hypothalamus

10. 2. Midbrain
Superior colliculi = vision
Inferior collicui = hearing
Homeostasis & reflexes

11. 3. Hindbrain
Medulla oblongata
Cerebellum
Pons

12. Dr. Ken Tangen
www.BiologicalPsych.com