How nerves grow

Found this on SomaSimple and maybe if we understand it we can help them along.
1. The growth cone (with a gorgeous picture of a baby nerve tip!).
http://scienceblogs.com/neurophilosophy/2007/11/the_growth_cone.php

2. A novel axon guidance mechanism
http://scienceblogs.com/neurophilosophy/2007/11/a_novel_axon_guidance_mechanis.php

3. The turning point
http://scienceblogs.com/neurophilosophy/2007/11/the_turning_point.php

4. Axon guidance: new directions

http://scienceblogs.com/neurophilosophy/2007/11/axon_guidance_new_directions.php

And we could watch them grow by 3d microscope or wiring diagram of the brain or

array tomography. Can they grow into the dead- fluid-filled area? Inquiring minds want to know.