As well known brain are connected to our body by neuronal cells. it transmits and receives its data by action potential during neuronal cells. i wonder if any one can explain to me the properties of this current. can we consider this current as an AC current?
You know those analogies of the brain being a computer and nerves being wires leading to and from it?
Those analogies are LIES.
There are no wires in the nervous system. Each neuron is a capacitor, the sodium potassium pumps create an electric charge in each neuron, and the neuron keeps that charge until the neighboring neuron (let's pretend it's not a sensory neuron) gives it a signal, in the form of an electric jolt or neurotransmitters.
That causes the neuron to equal out the charges on the inside and outside, called depolarization. Watch this video: action potential crash course A nerve could contain a bunch of neurons in a line next to each other, with one depolarizing the other.
This functions like a wire, in the way that it can transmit signals, but should be though of more like a domino effect, where the dominoes can stand themselves back up after the depolarization.
Electrons do not move from one end of the nerve to the other, only the "wave" of neural depolarization.
And since each neuron operates like a capacitor, it would be DC not AC current.
When I first learned about neurons, I was flabbergasted that it worked this way. I thought it was like wires, with a positive and negative end...
It couldn't be more different...