How does brain know what nerve sent the signal?


I mean, you stub your toe, some sort of electric signal goes to spine/brain, right? But if it’s an electric signal, does it carry **specific data** to tell brain which body part got hurt? How does that work?

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2 Answers

Anonymous 0 Comments

The data each nerve sends is essentially the same. What matters the most is where it ends in the cortex. So the nerves in the toe that carry pain sensation end up in the cortical area that interprets pain in the toe.

Anonymous 0 Comments

It’s directly wired. It’s not 1 wire, it’s a bunch of them. Each wire is connected to different regions. So when you stub your toe, the nerves that signal damage in the toe trigger. This stimulates the parts of the brain responsible for detecting damage in the toe. You interpreted this as pain in your toe.