Now, here with 256 electrodes.

OK, now, these are my sprinting legs, made of carbon graphite,

We can introduce electrodes within those circuits.

First of all, these electrodes are noninvasive.

But look at all the electrodes around it.

This right here is carbon, and this is in the...in its graphite form

We got all these electrodes now, arrays are being developed.

Oh, we'll only be using two small electrodes on him.

So what we're doing is placing these electrodes throughout the brain.

So we went ahead and implanted electrodes in patients with depression.

Olds and Milner put electrodes into the brain of a rat.

liquid metals for both electrodes and a molten salt for the electrolyte.

We're going to see electrodes being placed for many disorders of the brain.

We copy this in the lab by outfitting cell culture systems with electrodes.

And what we tried with the pig was external electrodes on the skin,

These brain electrodes can tell us more than just where the seizures happen.

I mention, you can actually map the brain and understand these are actually electrodes that were implanted and you can localize where exactly is the electrodes are touching in the brain.

The electrodes are turned off now, and you can see that she has tremor.

So one of areas that they want to implant electrodes, we find it here.

Now, this is Dr. Lene Harbott applying electrodes to the head of John Morton.

It's fitted with solid electrodes and an electrolyte that's a solution of salt and water.

And the current passing between the electrodes generates enough heat to keep it at temperature.

These electrodes act like mini pacemakers to get the cells to contract in the lab.

Using a grid the size of your thumb, with 32 electrodes on the surface of his brain,

And we can use electrodes or antennae to pick that up and tell the arm to move.

Using a grid the size of your thumb, with 32 electrodes on the surface of his brain,

Two players who are being scanned using EEG electrodes are going to bargain over one to six dollars.

After doctors are sure where the seizures come from in the brain, they can take the electrodes out.

Then with a brush I smudge the graphite for a more even finish. I reinforce the shadow in the vicinity of the drop, and then smudge it.

This electrode here, called the gate, controls the flow of current from the source to the drain these two electrodes.

Based on where the doctors place the electrodes in the brain, we can ask questions about what the brain does.

You can see the movements on his chest, and those little hash marks are where we put our antennae, or electrodes.

And that's fortunate, because we can put two electrodes on your palm and measure the change in skin resistance produced by sweating.

Galvani's approach of probing the nervous system with electrodes has remained state of the art until today, despite a number of drawbacks.

Again, it's got technology it's got electrodes going into its left and right hemispheres it's got a camera on top of its head.

She's putting electrodes on his head so that we can monitor the electrical activity in John's brain as he races around the track.

We're going to place electrodes within the circuits that regulate your memory and cognitive function to see if we can turn up their activity.

I started as a neurophysiologist, poking little tiny cells with even tinier electrodes to see what they would tell me about creativity and innovation.

Now you've seen before that with electrodes you can control robotic arms, that brain imaging and scanners can show you the insides of brains.

In order to find the exact location of the seizure onset, doctors embed electrodes directly into the patient's brain around the suspected seizure center.

You're supposed to put a bunch of these things on there, but our little motor's making all kinds of noise right next to my electrodes.

They're both made of carbon, and yet one of them has carbon atoms in it that are arranged in one particular way on the left and you get graphite, which is soft and dark.

And I'm up there in Boston against people wearing legs made of all things carbon graphite and, you know, shock absorbers in them and all sorts of things and they're all looking at me like,

Now, clearly we're not going to put a couple of electrodes on his head and understand exactly what all of his thoughts are on the track.

Now the first example I'm going to show you is a patient with Parkinson's disease, and this lady has Parkinson's disease, and she has these electrodes in her brain, and I'm going to show you what she's like when the electrodes are turned off and she has her Parkinson's symptoms, and then we're going to turn it on.