> "...slow speed of the sodium pump recovering the resting potential..." Any neuroscientists out there know if cycles (from graph theory) are possible in the b

> "...slow speed of the sodium pump recovering the resting potential..." Any neuroscientists out there know if cycles (from graph theory) are possible in the brain? Put another way, would the signal generated from neuron1 be able to travel around in a circuit of other neurons and come back to activate neuron1 again? Or is this not possible because neuron1 would still be recovering? I've wondered this for awhile would love it if someone had the answer :)