how was the nervous system of the human body mapped?

Question

how was the nervous system of the human body mapped?

In: Biology

Answer 1

Cutting up dead bodies carefully.

Then; cutting up dead bodies even more carefully with smaller knives

Then imaging technology like MRI

Then ultra high speed cameras

Answer 2

In addition to the dissection of dead bodies, they also learned a lot from studying people with various damaged nerves. So they found out due to neck wounds which ones were necessary for breathing, which controlled the digestive tract, which ones when into the arms and which ones when into the legs.