Which part of the neural communication process uses the most energy (ATP)?

Assume we can record spatially related neural activity from the entorhinal cortex and hippocampus of human. You are on vacation in London and have a map to find the Tower of London (you also do not have a smartphone). What spatially related activity would you see in the entorhinal cortex as you are walking around London with your map with Cartesian coordinates? What activity pattern would you see in the hippocampus as you were moving toward your destination?

what is the role of the first aiders?

Why is the other part of the body being controlled by the brain