Brain Science with Ginger Campbell, MD: Neuroscience for Everyone cover image

BS 201 Brain Development with Bill Harris

Brain Science with Ginger Campbell, MD: Neuroscience for Everyone

CHAPTER

What Are the Chemical Signals That Guide the Axons?

The number of neurons in the human brain peaks before birth and declines. Neurons compete for a limited amount of survival factor that's released by their target cells. Only those that get enough of it by making good synapses survive.

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