
10/03/2025
The spinal cord is essentially a river that allows electrical impulses from the brain to flow to the extremities. Peripheral nerves and nerve roots are the streams branching from the river, providing flow to areas farther away from the spine. This allows for voluntary and involuntary movements, pain, sensation of touch and perception of hot and cold.
When an injury creates a "dam" in the spinal cord river, the extremities can no longer receive input from the brain, causing things like paralysis and loss of sensation.
In recent years it has become more clear that peripheral nerves can slowly heal, taking over the jobs of nerves impacted by injury, developing new routes for flow and returning some function.
Unfortunately, if the river itself dries up, it is a lot harder to return to the same level of function.
The analogy of the river is a simple way to understand why some spine or nerve injuries are worse than others.
roots