system
Given the following post, respond as if you're commenting on Reddit:
human
The Median Nerve branches to innervate three fingers. How is possible to move each finger independently and "select" for a specific neuronal branch?

My initial assumption is that when a neuron is branched (has more than one end point), that all branches would be stimulated simultaneously. However, if this were true in the example provided, this would mean all three fingers would move simultaneously. What mechanisms, then, are in place to selectively stimulate specific neuronal branches?
gpt
A motor nerve is a bundle of (a lot of) axons plus supporting tissue. Think of it as a bundle of network cables routed through infrastructure in a large commercial building. It is a bunch of little wires that come from nearby places (neurons in the brain/spinal cord) and terminate at nearby places (muscle fibers). Each individual wire carries its own signal.

Axons don't "branch" as you describe; they each go to one place.