Severed Nerves, Reunited

摘要

Peripheral nerves show some ability to regenerate after damage, but it is not an easy process. When an axon is severed, the neuronal cell body must convert the remaining axon stump into a developing axon with a growth cone. Then the axon must find its way past the damaged region and on to its original target, along the way contending with disrupted tissues, inhibitory signals, and an absence of the developmental signals that built the connection in the first place.