Neuron Genesis

Neuron Genesis

1. Brain- 100 billion neurones

   • Brain- 100 B neurones  Retinal ganglian cells; axon extend- optic nerve  
   • retinal ganglion; axons extend- optical nerve
     • Only ganglion cell axons (nasal retina) cross optic chiasm
       • axons 2 eyes- mix in optic tract
         • LGN (Lateral Geniculate nucleus) 3 types:
           • Ganglion cell type
           • Eye of origin
           • Retinotopic position
           • LGN neurones axons- optic radiations travel to:
             • Internal capsule- terminates @ primary vescicle

2. 3 Stages

   • 3. Cell differentiations
   • 2.Cell Migration
   • 1.Cell Proliferation